Q_Id int64 337 49.3M | CreationDate stringlengths 23 23 | Users Score int64 -42 1.15k | Other int64 0 1 | Python Basics and Environment int64 0 1 | System Administration and DevOps int64 0 1 | Tags stringlengths 6 105 | A_Id int64 518 72.5M | AnswerCount int64 1 64 | is_accepted bool 2
classes | Web Development int64 0 1 | GUI and Desktop Applications int64 0 1 | Answer stringlengths 6 11.6k | Available Count int64 1 31 | Q_Score int64 0 6.79k | Data Science and Machine Learning int64 0 1 | Question stringlengths 15 29k | Title stringlengths 11 150 | Score float64 -1 1.2 | Database and SQL int64 0 1 | Networking and APIs int64 0 1 | ViewCount int64 8 6.81M |
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24,086,346 | 2014-06-06T16:12:00.000 | 1 | 1 | 1 | 0 | python | 24,086,656 | 1 | true | 0 | 0 | You can retrieve loaded modules at runtime by reading sys.modules. This is a dictionary containing module names as keys and module objects as values. From module object you can get the path to the loaded module.
But be aware: somewhere in you project modules can be loaded in runtime. In this case you can try to find us... | 1 | 3 | 0 | I'm working on a fairly large Python project with a large number of modules in the main repo. The problem is that over time we have stopped using many of these modules without deleting or moving the .py file. So the result is we have far more files in the directory than we are actually using, and I would like to remove... | Finding unused python modules in a directory | 1.2 | 0 | 0 | 277 |
24,091,411 | 2014-06-06T22:15:00.000 | 1 | 0 | 0 | 0 | python-2.7,scipy,integrate | 24,771,340 | 1 | true | 0 | 0 | in scipy.integrate.quad there's a lower-level call to a difference function that is iterated over, and it's iterated over divmax times. In your case, the default for divmax=20. There are some functions that you can override this default -- for example scipy.integrate.quadrature.romberg allows you to set divmax (defau... | 1 | 3 | 1 | I am currently trying to compute out an integral with scipy.integrate.quad, and for certain values I get the following error:
/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/scipy/integrate/quadrature.py:616: AccuracyWarning: divmax (20) exceeded. Latest difference = 2.005732e-02
Accurac... | SciPy Quad Integration: Accuracy Warning | 1.2 | 0 | 0 | 2,346 |
24,093,235 | 2014-06-07T03:02:00.000 | 1 | 0 | 1 | 0 | python,regex | 24,093,407 | 3 | false | 0 | 0 | Let's look at each of your expressions, then we'll add one interesting twist that may resolve any outstanding confusion.
[ab]* is equivalent to (?:a|b)*, in other words match a or b any number of times, for instance abbbaab.
[ab] is equivalent to (?:a|b), in other words match a or b once, for instance a.
a* means match... | 2 | 0 | 0 | What makes me wonder is that
why [ab]* doesn't repeat the matched part, but repeat [ab]. In other words, why it is not the same as either a*, or b*?
why ([ab])\1 repeat the matched part, but not repeat [ab]. In other words, why it can only match aa and bb, but not ab and ba?
Is it because the priority of () is lo... | Compare two regexs [ab]* and ([ab])\1 | 0.066568 | 0 | 0 | 60 |
24,093,235 | 2014-06-07T03:02:00.000 | 1 | 0 | 1 | 0 | python,regex | 24,093,261 | 3 | true | 0 | 0 | They both are entirely different.
When you say [ab]*, it means that either a or b for zero or more times. So, it will match "", "a", "b", and any combination of a and b.
But ([ab])\1 means that either a or b will be matched and then it is captured. \1 is called a backreference. It refers to the already captured group i... | 2 | 0 | 0 | What makes me wonder is that
why [ab]* doesn't repeat the matched part, but repeat [ab]. In other words, why it is not the same as either a*, or b*?
why ([ab])\1 repeat the matched part, but not repeat [ab]. In other words, why it can only match aa and bb, but not ab and ba?
Is it because the priority of () is lo... | Compare two regexs [ab]* and ([ab])\1 | 1.2 | 0 | 0 | 60 |
24,093,913 | 2014-06-07T05:12:00.000 | 1 | 0 | 0 | 0 | php,python,mysql,google-cloud-messaging | 24,094,254 | 2 | false | 1 | 0 | From what I understand, if you want to store unstructured data and retrieve it really fast, you should be looking at NoSql segment for storage and try to do a POC using a few of the available solutions in market. I would like to suggest giving a try to Aerospike NoSql DB which has a track record of easily doing 1 Milli... | 1 | 2 | 0 | I need to design a mobile application which requires a lot of database queries. A lot of means, a peak value can be 1 million in a sec. I dont know which database to use and which backed to use. In client side, i will be using phonegap for android and ios and i will be needing a webinterface for pc also.
My doubts are... | very high number of queries in a second. | 0.099668 | 0 | 0 | 90 |
24,096,036 | 2014-06-07T10:01:00.000 | 0 | 0 | 1 | 0 | macos,python-2.7,neural-network,pybrain | 24,102,842 | 1 | true | 0 | 0 | I used pillow, and downloaded some fonts, so I successfully generated many files.
Thank you, community, for help. | 1 | 0 | 0 | I want to train my pyBrain network to recognise digits. They should be written in 16x16 bmp files. Since drawing manually 10 digits is not enough for machine to learn, how is it possible to generate a lot (20-40 each) of single digit files using many fonts (preferably already installed on computer)? | Creating a set of letters written in different fonts | 1.2 | 0 | 0 | 22 |
24,100,963 | 2014-06-07T19:46:00.000 | 2 | 0 | 1 | 0 | python,pycharm | 60,985,796 | 4 | false | 0 | 0 | To run in debug mode press the 'bug' button (or Shift + F9).
Step over - F8
Step into - F7
Step out - Shift+F8.
Step to next breakpoint (or end) - F9 | 1 | 16 | 0 | I am using PyCharm (community version) for my Python IDE. I want the program to debug in a line-by-line fashion. So I don't want to set every line as a break point... Is there a way I could do this? | PyCharm: debugging line by line? | 0.099668 | 0 | 0 | 17,147 |
24,103,468 | 2014-06-08T06:06:00.000 | 0 | 0 | 1 | 0 | python-3.x,pycharm,couchdb-python | 24,103,871 | 2 | false | 0 | 0 | Python 3 support for couchdb-python was recently committed, but not yet included in any release. You can either wait for the next release (0.10 I guess) or install package from sources, not from PyPI as PyCharm does. | 2 | 0 | 0 | I am using IDE PyCharm 3.4 and python 3.3 (tried use python 3.4 but the same problem). I want to install CouchDB package through IDE:
Step by step:
1) Install "Pygments" package (because it's required package)
2) Trying to install "CouchDB"package -
print 'Pygments not installed, syntax highlighting disabled'
Whe... | Python 3 can't use with couch db | 0 | 0 | 0 | 415 |
24,103,468 | 2014-06-08T06:06:00.000 | 0 | 0 | 1 | 0 | python-3.x,pycharm,couchdb-python | 24,103,890 | 2 | false | 0 | 0 | I tried installing "Pygments" and "CouchDB" with PyCharm 3.4 and Python 3.4.1.
I received the same results that you did, however I looked further and noticed a second CouchDB package for Python called "pycouchdb". I installed it no problem.
I hope this helped. | 2 | 0 | 0 | I am using IDE PyCharm 3.4 and python 3.3 (tried use python 3.4 but the same problem). I want to install CouchDB package through IDE:
Step by step:
1) Install "Pygments" package (because it's required package)
2) Trying to install "CouchDB"package -
print 'Pygments not installed, syntax highlighting disabled'
Whe... | Python 3 can't use with couch db | 0 | 0 | 0 | 415 |
24,108,241 | 2014-06-08T16:27:00.000 | 0 | 0 | 0 | 1 | python,google-app-engine | 24,108,384 | 1 | false | 1 | 0 | App Engine does not support Python 3.x. Do you still have 2.x installed? Go to your Google App Engine Launcher > Preferences, and make sure you have the proper Python Path to your v2.x. It should be something like "/usr/bin/python2.7"
From Terminal, typewhereis python to help find it. If you know you were using ver... | 1 | 0 | 0 | I installed Python 3.4 on my Mac (OS 10.9.3) and my command for running Google App Engine from the terminal via /usr/local/dev_appengine stopped working. I then (stupidly) did some rather arbitrary things from online help forums and now my Google App Engine itself stopped working as well. When I open it, it says:
Sorry... | Google App Engine SDK Fatal Error | 0 | 0 | 0 | 194 |
24,110,915 | 2014-06-08T21:16:00.000 | 2 | 0 | 0 | 0 | python,networking | 24,110,983 | 1 | false | 0 | 0 | There are 2 possible ways:
1) UPnP / NATPMP / PCP - These are protocols implemented by some(most?) routers
more likely local networks to allow applications behind a firewall interact
in this case you send packets (from both clients) to their respective routers
using the protocol mentioned above asking for a po... | 1 | 0 | 0 | How do you have two programs communicate when there is a firewall in the way. I would like something sort of like socket, but that doesn't work through firewalls. It is okay if you have to use a 3rd party resource. I am doing this in python. | Have programs communicate when there is a firewall? | 0.379949 | 0 | 1 | 73 |
24,112,027 | 2014-06-08T23:45:00.000 | 26 | 0 | 1 | 0 | python,broken-pipe | 24,112,053 | 1 | true | 0 | 0 | A pipe connects two processes. One of these processes holds the read-end of the pipe, and the other holds the write-end.
When the pipe is written to, data is stored in a buffer waiting for the other processes to retrieve it.
What happens if a process is writing to a pipe, but the process on the other side suddenly exit... | 1 | 13 | 0 | Running code in python, I discovered a "Broken Pipe Error." Can someone please explain to me what this is simply?
Thanks. | What is a broken pipe error? | 1.2 | 0 | 0 | 18,837 |
24,112,422 | 2014-06-09T01:02:00.000 | 0 | 0 | 0 | 0 | python,mysql,ruby-on-rails | 24,112,483 | 1 | true | 0 | 0 | Use ssh to login to your home computer, setup authorized keys for it and disable password login. setup iptables on your linux machine if you don't have a firewall on your router, and disable traffic on all ports except 80 and 22 (ssh and internet). That should get you started. | 1 | 0 | 0 | I have read a few posts on how to enable remote login to mysql. My question is: is this a safe way to access data remotely?
I have a my sql db located at home (on Ubuntu 14.04) that I use for research purposes. I would like to run python scripts from my Macbook at work. I was able to remote login from my old windows O... | Best way to access data from mysql db on other non-local machines | 1.2 | 1 | 0 | 49 |
24,113,496 | 2014-06-09T04:01:00.000 | 9 | 0 | 1 | 0 | python,utf-8,decode | 24,113,534 | 1 | true | 0 | 0 | The byte boundaries are easily determined from the bit patterns. In your case, \xc6 starts with the bits 1100, and \xe2 starts with 1110. In UTF-8 (and I'm pretty sure this is not an accident), you can determine the number of bytes in the whole character by looking only at the first byte and counting the number of 1 bi... | 1 | 8 | 0 | I've been doing a bunch of reading on unicode encodings, especially with regards to Python. I think I have a pretty strong understanding of it now, but there's still one small detail I'm a little unsure about.
How does the decoding know the byte boundaries? For example, say I have a unicode string with two unicode cha... | How does decoding in UTF-8 know the byte boundaries? | 1.2 | 0 | 0 | 919 |
24,113,602 | 2014-06-09T04:15:00.000 | 0 | 1 | 0 | 1 | python,amazon-web-services,amazon-ec2,flask,scalability | 24,115,986 | 1 | false | 1 | 0 | Autoscaling is tailor-made for situations like these. You could run an initial diagnostic to see what the CPU usage usually is when a single server is running it's maximum allowable tasks (let's say it's above X%).
You can then set up an autoscaling rule to spin up more instances once this threshold is crossed. Your ru... | 1 | 0 | 0 | There is a long running task (20m to 50m) which is invoked from a HTTP call to a Webserver. Now, since this task is compute intensive, the webserver cannot take up more than 4-5 tasks in parallel (on m3.medium).
How can this be scaled?
Can the auto-scaling feature of EC2 be used in this scenario?
Are there any other f... | Long running task scalablity EC2 | 0 | 0 | 0 | 63 |
24,116,662 | 2014-06-09T08:47:00.000 | 4 | 1 | 1 | 0 | python,x86,arm,raspberry-pi,raspbian | 24,117,029 | 1 | true | 0 | 0 | If you write code in python, it will work perfectly fine directly on both your desktop and the raspberry pi.
C, you'll have to recompile but that's about it. There might also be some issues if you start writing data structures to files directly and then using the same files across the different platforms -- you'll typi... | 1 | 3 | 0 | I recently purchased a Raspberry Pi.
I wish to start writing code for it using either C or Python.
I know the differences between ARM vs x86 architecture, viz. RISC vs CISC, but what I don't know is that are there any special considerations on the actual code that I would need to write.
If I write my code on my desktop... | Differences when writing code for ARM vs x86? | 1.2 | 0 | 0 | 3,679 |
24,117,449 | 2014-06-09T09:36:00.000 | 7 | 0 | 1 | 0 | python,conda | 24,172,920 | 3 | false | 0 | 0 | There's no simple command to do this, but one thing that may help is to make a metapackage using the conda metapackage command that depends on the packages you want, so that you can install just it. Something like conda metapackage mypackage 1.0 --dependencies package1 package2 package3 ....
Otherwise, you probably jus... | 1 | 9 | 0 | I'm using conda to run tests against different versions of python, numpy, etc., but there are some common dependencies for all combinations of python/numpy. Is there a way to install such packages into all conda environments, or do I have to specify each by hand? | Install a package into multiple/all conda environments? | 1 | 0 | 0 | 5,578 |
24,118,765 | 2014-06-09T10:53:00.000 | 1 | 0 | 0 | 0 | python,sqlite,tkinter | 24,123,191 | 1 | true | 0 | 1 | I think you would use
.grid() in a Frame or
multiple Listboxes with as many scrollbars as you like. | 1 | 0 | 0 | I have a database table (created using the SQLite3 library) and would like to be able to open a new window (in a program that I am writing) which will simply display the contents of the table (*.db) with a scroll bar to the user (perhaps on a grid like you would find in a spreadsheet).
Are there any easy ways of achiev... | Is there a tkinter widget to easily display a table (SQLite) in a window (canvas)? | 1.2 | 0 | 0 | 1,409 |
24,121,385 | 2014-06-09T13:31:00.000 | 1 | 0 | 1 | 0 | python,numpy | 24,121,981 | 1 | false | 0 | 0 | Anaconda installs python just like it already is on your system, only to a different location. It allows you to choose what packages you want to install. If you want to replace one you can go into the site-packages folder (Anaconda/lib/site-packages) and do so. In my experience, Anaconda was well worth the switch. | 1 | 0 | 0 | I'm pondering switching over to Anaconda from my vanilla Python in OSX. I know Anaconda brings its own NumPy. I was wondering if it was possible to make the GitHub version of NumPy the default version, or if Anaconda only works with its own version. | Installing Numpy developmental over anaconda | 0.197375 | 0 | 0 | 52 |
24,121,692 | 2014-06-09T13:49:00.000 | 3 | 0 | 1 | 0 | python,excel,xlwings | 24,122,113 | 1 | true | 0 | 0 | In "C:\Users\xxxxx\AppData\Local\Continuum\Anaconda3\lib\site-packages\xlwings__init__.py"
Try changing from xlwings import Workbook, Range, Chart, __version__
to from xlwings.xlwings import Workbook, Range, Chart, __version__ | 1 | 4 | 0 | I'm trying to use the new excel integration module xlwings
It works like a charm under Anaconda 2.0 for python 2.7
but I'm getting this error under Anaconda 2.0 for python 3.4
the xlwings file does contain class Workbook so I don't understand why it can't import it
when I simply use the xlwings file in my project for ... | importing xlwings module into python 3.4 | 1.2 | 1 | 0 | 2,145 |
24,121,883 | 2014-06-09T13:59:00.000 | -3 | 0 | 0 | 0 | python,matplotlib,histogram | 24,121,929 | 2 | false | 0 | 0 | Do you want to set the number of elements in each bin? I think that's a bar plot rather than a histogram. So simply use ax.bar instead.
EDIT Good point by tcaswell, for multidimensional images the equivalent is imshow rather than bar. | 1 | 1 | 1 | I am trying to plot values of z binned in (x,y). This would look like a hist2d in matplotlib but with the bin content being defined by another array instead of representing the number of counts. Is there any way to set the bin content in hist2d? | How to set bin content in a hist2d (matplotlib) | -0.291313 | 0 | 0 | 1,859 |
24,122,850 | 2014-06-09T14:50:00.000 | 1 | 0 | 0 | 0 | python,numpy,pandas | 27,997,033 | 6 | false | 0 | 0 | pip uninstall numpy uninstalls the old version of numpy
pip install numpy finds and installs the latest version of numpy | 1 | 16 | 1 | I took a new clean install of OSX 10.9.3 and installed pip, and then did
pip install pandas
pip install numpy
Both installs seemed to be perfectly happy, and ran without any errors (though there were a zillion warnings). When I tried to run a python script with import pandas, I got the following error:
numpy.d... | pandas ValueError: numpy.dtype has the wrong size, try recompiling | 0.033321 | 0 | 0 | 27,508 |
24,123,128 | 2014-06-09T15:05:00.000 | 0 | 1 | 0 | 1 | python,git | 24,123,328 | 2 | false | 0 | 0 | in the top of your python file add #!/usr/bin/python then you can rename mv myScript.py myScript and run chmod 755 myScript. This will make it so you can run the file with ./myScript look into adding the file directory to your path or linking it to the path if you want to be able to run it from anywhere. | 1 | 3 | 0 | I'm writing git commands through a Python script (on Windows)
When I double click on myScript.py, commands are launched in the Windows Command Prompt.
I would like to execute them in Git Bash.
Any idea how to do that without opening Git Bash and write python myScript.py? | Launch Python script in Git Bash | 0 | 0 | 0 | 28,190 |
24,123,389 | 2014-06-09T15:19:00.000 | 5 | 0 | 0 | 1 | python,web-services,dns,flask,tornado | 24,125,918 | 1 | true | 1 | 0 | I managed to solve it by myself, but I'll add this as an answer since evidently someone thought it was a worthwhile question.
It turns out that it was just me that did not understand how DNS works and what the difference between DNS and domain forwarding is. At most domain hosts you can configure "domain forwarding", w... | 1 | 6 | 0 | I have a small home-server running Flask set up at IP a.b.c.d. I also have a domain name xyz.com.
Now I would like it so that when going to xyz.com, the user is served the content from a.b.c.d, with xyz.com still showing in the address bar. Similarly, when going to xyz.com/foo the content from a.b.c.d/foo should be sh... | Custom domain routing to Flask server with custom domain always showing in address bar | 1.2 | 0 | 0 | 2,809 |
24,126,783 | 2014-06-09T18:44:00.000 | 0 | 0 | 1 | 0 | python,html,regex,bash,sed | 24,127,504 | 1 | false | 1 | 0 | I will write the outline for the code in some kind of pseudocode. And I don't remember Python well to quickly write the code in Python.
First find what type it is (if contains N=0 then type 3, if contains "+" then type 2, else type 1) and get a list of strings containing "N=..." by exploding (name of PHP function) by "... | 1 | 1 | 0 | I need to create a BASH script, ideally using SED to find and replace value lists in href URL link constructs with HTML sit files, looking-up in a map (old to new values), that have a given URL construct. There are around 25K site files to look through, and the map has around 6,000 entries that I have to search through... | How to find and replace 6 digit numbers within HREF links from map of values across site files, ideally using SED/Python | 0 | 0 | 1 | 95 |
24,127,601 | 2014-06-09T19:35:00.000 | -1 | 0 | 0 | 0 | python,uwsgi | 67,135,000 | 3 | false | 0 | 0 | it worked for me by comment
#master = true
and put this,
lazy-apps = true
in uwsgi.ini file | 2 | 52 | 0 | Trying to set the timeout for requests in uWSGI, I'm not sure of the correct setting. There seem to be multiple timeout options (socket, interface, etc.) and it's not readily evident which setting to configure or where to set it.
The behavior I'm looking for is to extend the time a request to the resource layer of a R... | uWSGI request timeout in Python | -0.066568 | 0 | 1 | 51,844 |
24,127,601 | 2014-06-09T19:35:00.000 | 22 | 0 | 0 | 0 | python,uwsgi | 28,458,462 | 3 | false | 0 | 0 | Setting http-timeout worked for me. I have http = :8080, so I assume if you use file system socket, you have to use socket-timeout. | 2 | 52 | 0 | Trying to set the timeout for requests in uWSGI, I'm not sure of the correct setting. There seem to be multiple timeout options (socket, interface, etc.) and it's not readily evident which setting to configure or where to set it.
The behavior I'm looking for is to extend the time a request to the resource layer of a R... | uWSGI request timeout in Python | 1 | 0 | 1 | 51,844 |
24,128,433 | 2014-06-09T20:26:00.000 | 6 | 0 | 0 | 0 | python,django,email,nginx,django-allauth | 24,129,038 | 2 | true | 1 | 0 | Django get hostname and port from HTTP headers.
Add proxy_set_header Host $http_host; into your nginx configuration before options proxy_pass. | 1 | 8 | 0 | I'm running django on port 8001, while nginx is handling webserver duties on port 80. nginx proxies views and some REST api calls to Django. I'm using django-allauth for user registration/authentication.
When a new user registers, django-allauth sends the user an email with a link to click. Because django is running... | django-allauth: how to modify email confirmation url? | 1.2 | 0 | 0 | 2,367 |
24,135,896 | 2014-06-10T08:06:00.000 | 0 | 1 | 0 | 0 | python,selenium-webdriver,selenium-firefoxdriver | 25,492,157 | 1 | false | 0 | 0 | Selenium is not the right tool to use for performance testing.
jmeter is a great tool for this. You would be able to see the response for each request. | 1 | 3 | 0 | Is it possible to calculate the performance testing through selenium with python?
If it is possible, how should I do it? | Is it possible to calculate the performance testing through selenium with python? | 0 | 0 | 1 | 304 |
24,135,908 | 2014-06-10T08:07:00.000 | 1 | 0 | 0 | 1 | google-app-engine,python-2.7,cron | 49,346,121 | 1 | true | 1 | 0 | The tip from @Greg above solved that problem for me.
Note the full sequence of events:
A past version of the application included a cron.yaml file that ran every hour
In a successive version, I removed the cron.yaml file, thinking that was enough, but then I discovered that the cron jobs were still running!
Uploading... | 1 | 1 | 0 | I start receiving errors from the CRON service even if I have not a single cron.yaml file defined.
The cron task runs every 4 hours.
I really don't know where to look at in order to correct such behaviour. Please tell me what kind of information is needed to correct the error.
Cron jobs
First Cron error
Cron Job : /ad... | Google Appengine runs Cron tasks even if they are no cron.yaml file defined | 1.2 | 0 | 0 | 645 |
24,153,503 | 2014-06-11T01:54:00.000 | 1 | 1 | 0 | 0 | python,c,matlab,mex | 24,154,260 | 2 | true | 0 | 1 | If you can build your program as a shared library, then you can use the ctypes foreign-function interface to call your functions.
This is often less work (and less complex) than wrapping the functions with Cython or writing your own C-API extension, but it is also more limited in what you can do. Therefore, I recommend... | 1 | 0 | 0 | I am currently working on a project to import a Matlab program to python for integration into ImageJ as a plugin. The program contains Mex files and the source code was written in C++. Is there a way to call the C++ functions without having to rewrite them in python. Thanks!!! | Call C/C++ code from Python | 1.2 | 0 | 0 | 1,339 |
24,155,105 | 2014-06-11T05:14:00.000 | 0 | 0 | 1 | 1 | python,path,pip | 24,155,174 | 1 | true | 0 | 0 | Try using easy_install
easy_install -U pip
This will remove pip.
If you don't have easy_install ... installed, do that first.
After uninstalling pip, simply reinstall it using the get-pip.py file. | 1 | 2 | 0 | I was able to install pip by using distribute_setup.py and get-pip.py. However, I had to add pip to path by adding C:\Python27\Scripts.
This worked for a little while but I had to do a system restore for other reasons and now when I type pip in the command prompt it returns: 'pip' is not recognized as an internal or ex... | Trouble with adding pip's system environment variable | 1.2 | 0 | 0 | 1,824 |
24,156,992 | 2014-06-11T07:25:00.000 | 0 | 0 | 0 | 0 | sql,node.js,python-2.7 | 24,157,502 | 3 | false | 1 | 0 | Yes its possible.
Two applications with different languages using one database is almost exactly the same as one application using several connections to it, so you are probably already doing it. All the possible problems are exactly the same. The database won't even know whether the connections are made from one appli... | 2 | 1 | 0 | The question is pretty much in the header, but here are the specifics. For my senior design project we are going to be writing software to control some hardware and display diagnostics info on a web front. To accomplish this, I'm planning to use a combination of Python and nodejs. Theoretically, a python service script... | Can two programs, written in different languages, connect to the same SQL database? | 0 | 1 | 0 | 1,076 |
24,156,992 | 2014-06-11T07:25:00.000 | 1 | 0 | 0 | 0 | sql,node.js,python-2.7 | 24,158,115 | 3 | true | 1 | 0 | tl;dr
You can use any programming language that provides a client for the database server of your choice.
To the database server, as long as the client is communicating as per the server's requirements (that is, it is using the server's library, protocol, etc.), then there is no difference to what programming language ... | 2 | 1 | 0 | The question is pretty much in the header, but here are the specifics. For my senior design project we are going to be writing software to control some hardware and display diagnostics info on a web front. To accomplish this, I'm planning to use a combination of Python and nodejs. Theoretically, a python service script... | Can two programs, written in different languages, connect to the same SQL database? | 1.2 | 1 | 0 | 1,076 |
24,158,704 | 2014-06-11T09:00:00.000 | 2 | 1 | 0 | 0 | python,django,heroku,imagemagick,pillow | 24,158,927 | 1 | false | 1 | 0 | I have had a similar experience (alas in Java) which might help make a decision .
Calling the ImageMagick library binding from Java (using JNI) seemed like a good idea, but turned out to leak memory by the tons.
We ended up moving to an external command-line invocation of ImageMagick - which worked a lot better, for th... | 1 | 3 | 0 | Our Heroku-hosted Django app does some simple image processing on images our users upload to Amazon S3—mostly resizing to the sizes we will display on the site. For this we use Pillow (the fork of the Python Imaging Library), running in a Celery task.
We have seen the time for this operation change from a fraction of a... | Which has the better memory footprint, ImageMagick or Pillow (PIL)? | 0.379949 | 0 | 0 | 1,421 |
24,159,713 | 2014-06-11T09:47:00.000 | -1 | 0 | 1 | 0 | python,python-2.7,dictionary,set,python-internals | 24,159,900 | 2 | false | 0 | 0 | These two are use the same datastructure in the backend. e.g in sets you cannot store duplicate values but in dict you can store multople same values and you can turn the dict to sets by changing the behavior of dict | 1 | 4 | 0 | Can anybody tell me how the internal implementation of set and dict is different in python? Do they use the same data structure in the background?
++ In theory, one can use dict to achieve set functionality. | difference between python set and dict "internally" | -0.099668 | 0 | 0 | 1,691 |
24,160,264 | 2014-06-11T10:11:00.000 | 0 | 0 | 0 | 0 | python,django,elasticsearch,full-text-search,django-haystack | 24,213,412 | 1 | true | 1 | 0 | The problem is that there was not enough memory. Upgrading from 2GB to 4GB in my VM fixed the problem. | 1 | 0 | 0 | I was wondering whats the maximum value for an indexable CharField in Django Haytack with elasticsearch?
I am asking this, because I am getting a timeout when I try to index a specific charfield that has a size of at least 736166.
This seems to be pretty big for me, but is there a way for me to avoid that timeout, or ... | Django Haystack Elastic Search maximum value for indexable CharField | 1.2 | 0 | 0 | 169 |
24,160,530 | 2014-06-11T10:24:00.000 | 1 | 0 | 0 | 0 | python,shell,pydoc | 26,183,554 | 1 | false | 0 | 0 | "--More--" means there is more stuff to show
Press Enter to show a line more, u can keep doing that
Press q to quit pydocs mode | 1 | 0 | 0 | I started learning Python recently. I'm using Zed Shaw's "Learning Python The Hard Way" and running my exercises mostly in Power Shell. OS is Windows 7 and I have Python 2.7.
Chapter 12 mentions pydoc. So here's the problem I'm running into with pydoc. Normally, I type in python -m pydoc whatever, it gives me the defin... | Power Shell issue with pydoc: "--More--" in last line and then can't type | 0.197375 | 0 | 0 | 75 |
24,164,407 | 2014-06-11T13:37:00.000 | 0 | 0 | 1 | 0 | python,windows | 24,164,716 | 1 | true | 0 | 0 | I've had exactly the same thing happen with Sublime. In my case I had moved / renamed the file after closing sublime. I reopened sublime some time later which reopened the old version of the file because I had left the file open when I last closed down sublime.
Have you tried closing the file and then opening it again ... | 1 | 0 | 0 | I'm currently using PyCharm and Sublime Text in Window to develop some Python script, but this morning something quite strange happens.
I am changing my code and testing it by running my code over test input. It is supposed to change the output text quite a lot. The output text at the end did not change at all. Then I ... | Unable to modify python script in Windows | 1.2 | 0 | 0 | 160 |
24,164,787 | 2014-06-11T13:54:00.000 | 1 | 1 | 1 | 0 | python,c++,c,unix,operating-system | 24,164,847 | 1 | false | 0 | 0 | On a lines you could use diff.
To Edit: xor_hash(new) - xor_hash(old) | 1 | 0 | 0 | I'm looking for a way to quantify the changes made to a file. That is, if I have a file with something written on, and I edit it and save it, is there a way to know (using Python or C/C++) how much the files has changed?
For example, if my file is "aaaaaaaaaaa" and I change it to "aaabbbbbbb", that quantification metho... | Quantify file changes | 0.197375 | 0 | 0 | 54 |
24,168,152 | 2014-06-11T16:37:00.000 | 2 | 0 | 0 | 0 | python,django,django-views,subprocess,popen | 24,169,550 | 1 | true | 1 | 0 | You don't say what "command" you want to call.
call_command is for calling Django management commands only - eg syncdb, runserver, or any custom management commands. It calls the command directly, without shelling out to the system.
popen and the various functions in subprocess etc are for shelling out to call any othe... | 1 | 0 | 0 | I want to start a command from django management/command from django.view but don't know which one to use. Can some one explain me the properties and differences of both.
Thanks in advance | Django call_command and popen. When to use what? | 1.2 | 0 | 0 | 437 |
24,168,239 | 2014-06-11T16:43:00.000 | 1 | 0 | 0 | 0 | mongodb,python-2.7,pymongo | 24,200,782 | 1 | true | 0 | 0 | After trying a combinaison of skip() + limit() I ended up with one of a easiest solution, it's just hard to find something about it.
So to retrieve a chunk in mongodb, for pagination for example use :
cursor = db.collection.find()[startItemPosition:stopItemPosition]
It's giving me a cursor with stopItemPosition - start... | 1 | 1 | 0 | I'm trying to create a module that give me X documents of a collection each time I call it.
I want to iterate through all my collection and get the next X elements each time I ask it.
I've tried to change the batch_size() of a cursor but I couldn't make it worked. I tried to set the limit() but it wasn't what I wanted.... | Read collection by chunk | 1.2 | 0 | 0 | 1,666 |
24,169,037 | 2014-06-11T17:27:00.000 | 2 | 0 | 0 | 0 | python,json,authentication,flask,werkzeug | 24,169,289 | 1 | false | 1 | 0 | It goes as follows:
your client POSTs JSON data without authentication
server receives the request (not necessarily in one long chunk, it might come in parst)
server evaluates the requests and finds it is not providing credentials, so decides stopping processing the request and replies 401.
With short POST size serve... | 1 | 0 | 0 | I've developed a fairly simple web service using Flask (Python 2.7, current Flask and dependencies), where clients POST a hunk of JSON to the server and get a response.
This is working 100% of the time when no authentication is enabled; straight up POST to my service works great.
Adding HTTP Digest authentication to th... | http POSTs over a certain size failing when authentication is enabled | 0.379949 | 0 | 0 | 119 |
24,169,303 | 2014-06-11T17:44:00.000 | 2 | 1 | 0 | 0 | python,logging | 24,169,956 | 1 | true | 0 | 0 | Syslog handler is a service, not a file
You seem to be confused by trying to specify logfile for syslog.
Quoting Wikipedia:
Syslog is a standard for computer message logging. It permits separation of the software that generates messages from the system that stores them and the software that reports and analyzes them.
... | 1 | 0 | 0 | I'm trying to find a Python script that uses logger to write file data to syslog. There's an application that outputs reports as log files, but I need these log files to be sent to syslog. I have this code, but I cannot determine how to target the log files and send it to syslog in Python.
This code has me on the right... | How to use Python script for logger to write file data to syslog? | 1.2 | 0 | 0 | 1,589 |
24,169,491 | 2014-06-11T17:56:00.000 | 2 | 0 | 1 | 0 | python,ipython-notebook | 26,172,404 | 2 | false | 0 | 0 | One way would be to make your cell a function. In another cell, just call time.sleep () in an appropriate loop. You could also have it check for the existence of some external resource to quit, if you don't want to loop an a priori known finite number of times. | 1 | 4 | 0 | I have a script in a notebook browser that does some live data analysis, that I would like to run periodically by itself once every few seconds/minutes, rather than I having to do Ctrl+Enter all the time.
Is there any way to achieve this? Do I need any additional plug-ins, and which ones | Python Notebook run automatically periodically | 0.197375 | 0 | 0 | 4,298 |
24,169,539 | 2014-06-11T17:59:00.000 | 1 | 1 | 0 | 1 | python,database,web-applications,ipc | 24,171,852 | 2 | false | 0 | 0 | Python has since early stages a very comfortable PyZMQ binding for ZeroMQ.
MATLAB can have the same, a direct ZeroMQ at work for your many-to-many communications.
Let me move in a bit broader view, from a few, but KEY PRINCIPAL POINTS, that are not so common in other software-engineering "products" & "stacks" we meet t... | 1 | 0 | 0 | At a high level, what I need to do is have a python script that does a few things based on the commands it receives from various applications. At this stage, it's not clear what the application may be. It could be another python program, a MATLAB application, or a LAMP configuration. The commands will be sent rarely, s... | How do I communicate and share data between python and other applications? | 0.099668 | 0 | 0 | 2,813 |
24,176,266 | 2014-06-12T04:04:00.000 | 0 | 0 | 0 | 0 | python,flash,flask,client,directory | 24,183,349 | 1 | false | 1 | 0 | Flask doesn't produce directory views; that's something generic file-serving HTTP servers like Apache and nginx can do (if so configured) but it is not functionality that Flask offers out of the box. You'd have to code this yourself. | 1 | 0 | 0 | Directory Structure:
static
game
something1.swf
something2.swf
something3.swf
templates
something.html
main.py
I have a small web game application that interacts with Flash .SWF files to show the images and everything back to the website.
If I call ./static/game/something1.swf, it loads. It loads any other f... | Flask can't find directory.. returns a 404? | 0 | 0 | 0 | 212 |
24,185,302 | 2014-06-12T13:11:00.000 | 0 | 0 | 0 | 0 | django,python-2.7,pandas | 35,639,956 | 1 | false | 0 | 0 | This is over a year old, but this is the only SO thread I found on this issue so thought I'd comment on what we did to fix it. It turns out there are issues with pd.read_csv(FileObject, engine="C") on an embedded wsgi process. We ended up solving this issue by upgrading to pandas 0.17.0. Another working solution was ... | 1 | 0 | 1 | Pandas read_csv causes a timeout on my production server with python 2.7, django 1.6.5, apache and nginx. This happens only when using a string buffer like StringIO.StringIO or io.BytesIO. When supplying a filename as argument to read_csv everything works fine.
Debugging does not help because on my development server t... | timeout pandas read_csv stringio timeout | 0 | 0 | 0 | 1,792 |
24,185,800 | 2014-06-12T13:33:00.000 | 0 | 0 | 0 | 0 | python,django,rest,extjs | 24,186,117 | 3 | false | 1 | 0 | In settings.py, set DEBUG=True to make Django show the whole error information in the web response.
With DEBUG=False you have to manually print the error to console using print or export it to a log with some log tool. | 1 | 1 | 0 | I'm developing a REST application using ExtJS4 and using Django 1.6.5 to create a simple mock API for this application, that for now I want to only save some data in the SQLite db and output some other to the console.
While testing the GET methods is fairly simple, when I have a problem with POST, PUT and DELETE I can'... | Show Django errors on console rather than Web Browser | 0 | 0 | 0 | 2,805 |
24,193,690 | 2014-06-12T20:51:00.000 | -3 | 0 | 1 | 0 | python,performance,comparison,equals | 24,193,976 | 3 | false | 0 | 0 | My experience with some Cortex M3 assembly (or at least my professors say that's what it is), is that when you check equality or non-equality, there is one compare command that sets up 3 bits, and one if statement (if you can call it that), which looks at a particular one. Essentially you compare A and B, the 3 bits ar... | 1 | 5 | 0 | When comparing any variable, there is the choice of comparing equality versus comparing inequality. For variables with one element, not a string/list/tuple/etc..., the difference is probably either non-existent or negligible.
The Question:
When comparing two multi-element variables, is checking whether they are equal ... | Comparing Performance in Python: equal versus non equal | -0.197375 | 0 | 0 | 2,494 |
24,194,217 | 2014-06-12T21:28:00.000 | 0 | 0 | 0 | 1 | python,google-app-engine,file-transfer,google-compute-engine | 24,194,583 | 4 | false | 1 | 0 | The most straightforward approach seems to be:
A user submit a form on App Engine instance.
App Engine instance makes a POST call to a handler on GCE instance with the new data.
GCE instance updates its own file and processes it. | 2 | 0 | 0 | I am working on a project that involves using an Google App Engine (GAE) server to control one or more Google Compute Engine (GCE) instances. The rest of the project is working well, but I am having a problem with one specific aspect: file management. I want my GAE to edit a file on my GCE instance, and after days of... | Using Google App Engine to update files on Google Compute Engine | 0 | 0 | 0 | 273 |
24,194,217 | 2014-06-12T21:28:00.000 | 0 | 0 | 0 | 1 | python,google-app-engine,file-transfer,google-compute-engine | 24,215,374 | 4 | false | 1 | 0 | You can set an action URL in your form to point to the GCE instance (it can be load-balanced if you have more than one). Then all data will be uploaded directly to the GCE instance, and you don't have to worry about transferring data from your App Engine instance to GCE instance. | 2 | 0 | 0 | I am working on a project that involves using an Google App Engine (GAE) server to control one or more Google Compute Engine (GCE) instances. The rest of the project is working well, but I am having a problem with one specific aspect: file management. I want my GAE to edit a file on my GCE instance, and after days of... | Using Google App Engine to update files on Google Compute Engine | 0 | 0 | 0 | 273 |
24,201,497 | 2014-06-13T09:01:00.000 | 1 | 1 | 0 | 0 | python,sqlalchemy | 24,201,579 | 1 | false | 1 | 0 | You will have to set the timing on the http server's (Apache for
example) configuration. The default should be more than 120 seconds, if I remember
correct. | 1 | 0 | 0 | I have a Python CGI that I use along with SQLAlchemy, to get data from a database, process it and return the result in Json format to my webpage.
The problem is that this process takes about 2mins to complete, and the browsers return a time out after 20 or 30 seconds of script execution.
Is there a way in Python (maybe... | Avoid Python CGI browser timeout | 0.197375 | 0 | 0 | 678 |
24,202,386 | 2014-06-13T09:45:00.000 | 2 | 0 | 0 | 0 | python | 24,202,505 | 1 | false | 0 | 0 | First of all: the question is not really related to Python at all. It's a general problem.
And the answer is simple: keep track of what your script does (in a file or directly in db). If it crashes continue from the last step. | 1 | 0 | 0 | I have a python script running on my server which accessed a database, executes a fetch query and runs a learning algorithm to classify and updates certain values and means depending on the query.
I want to know if for some reason my server shuts down in between then my python script would shut down and my query lost.
... | Python re establishment after Server shuts down | 0.379949 | 1 | 0 | 22 |
24,205,175 | 2014-06-13T12:21:00.000 | 1 | 0 | 1 | 0 | python,crash,startup,portability,portable-python | 24,205,317 | 1 | false | 0 | 0 | First i would start it after a fresh reboot and look which services run directly after reboot and after first, second... programm start.
Then looking at the ram acn be intresting. Maybe you got a ram leak/overflow.
Then i would compare theese results with a program start, when you did ur typical stuff (office, games, i... | 1 | 0 | 0 | When I run Python portable, sometimes it crashes, sometimes it does not. I am not sure if it is clashing with another program or if it is something else. I can never reproduce this situation. Can anyone help? | When I run python portable, sometimes it crashes, sometimes it doesnt | 0.197375 | 0 | 0 | 120 |
24,207,823 | 2014-06-13T14:33:00.000 | 0 | 0 | 0 | 0 | python,snmp | 24,229,459 | 1 | false | 0 | 0 | If .1.3.6.1.4.1.8072.2.255 is the last OID, then End of MIB is something expected for such a WALK operation.
If you want to in fact query .1.3.6.1.4.1.8072.2.255, you should use GET operation (snmpget), or WALK from another OID, such as .1.3.6.1.4.1.8072.2. | 1 | 0 | 0 | I've to implement something like a monitoring for specific value returned by a script on the server. I've done the script, in python... now I've tried to link it to SNMP via pass_persist:
pass_persist .1.3.6.1.4.1.8072.2.255 /root/isnmp/myscript.py
when I call
snmpwalk -On -c public -v 1 localhost .1.3.6.1.4.1.8072.2.... | END of MIB when calling pass_persist script SNMP | 0 | 0 | 0 | 733 |
24,209,812 | 2014-06-13T16:20:00.000 | 0 | 0 | 1 | 0 | python,mean | 24,209,906 | 1 | false | 0 | 0 | Use a dictionary with the year as the key and the temp and a counter as the value (as a list). If the year isn't found add an entry with the mean temp and the counter at 1. If the year is already there add the temperature to the existing temp and increment the counter.
The rest should be easy. Note this gives you the a... | 1 | 0 | 1 | Year Month MeanTemp Max Temp Min Temp Total Rain(mm) Total Snow(cm)
2003 12 -0.1 9 -10.8 45 19.2
1974 1 -5.9 8.9 -20 34.3 35.6
2007 8 22.4 34.8 9.7 20.8 0
1993 7 21.7 32.5 11 87.7 0
1... | Finding the yearly mean temperatures from scrambled months python | 0 | 0 | 0 | 554 |
24,210,666 | 2014-06-13T17:16:00.000 | 0 | 0 | 0 | 0 | python,google-maps,python-2.7,python-imaging-library,kml | 24,211,949 | 1 | false | 0 | 0 | You could use the width and height of the polygon/rectangle in longitude and latitude coordinates. Then use the ratio of that rectangle to the image size and it should fit.
Edit: I should note that depending on where your images are going to show up you might need some special math for the dateline (-180 to 180) or pri... | 1 | 0 | 0 | OS X 10.7.5, Python 2.7, GE 7.1.2.2041
I have some .kml data that includes a moderately large number of polygons. Each polygon has an image associated with it. I want to use each image in a <GroundOverlay> mode with its associated polygon.
The raw images are all a bit larger than the polygons. I can easily resize the i... | How to calculate Google Earth polygon size in pixels | 0 | 0 | 0 | 245 |
24,212,724 | 2014-06-13T19:37:00.000 | 5 | 1 | 0 | 1 | php,python | 34,741,305 | 1 | false | 0 | 0 | I know this post i old but for future reference, as I assume you have moved on... I can inform that after I read your question I contacted One.com (12 jan 2016) and they said that they do not support Python and are not planning to do so in the near future. | 1 | 0 | 0 | I am trying to run a python script on one.com after a user completes an action on my website. If I run it using a shell file (every couple of minutes) when I run it in the background and end the ssh session it ends the script. I have tried running if from php using shell_exec and system but these are blocked by one.com... | Running Python from PHP on one.com | 0.761594 | 0 | 0 | 3,118 |
24,213,788 | 2014-06-13T21:04:00.000 | 2 | 0 | 1 | 0 | ipython,spyder | 25,560,508 | 1 | false | 0 | 0 | The development version of Spyder has a Pandas Dataframe editor (and an numpy array editor, up to 3d). You can run this from source or wait for the next release, 2.3.1.
This is probably more adequate to edit or visualize dataframe than using the embedded qtconsole. | 1 | 2 | 1 | The new anaconda spyder has an integrated iPython console. I really dislike the way dataframes are displayed in this console. There are some border graphics around the dataframe and resizing that occurs with window resizing that make it difficult to examine the contents. In addition, often for large dataframes if on... | Anaconda Spyder integrated IPython display for dataframes | 0.379949 | 0 | 0 | 1,871 |
24,214,364 | 2014-06-13T22:00:00.000 | 0 | 0 | 0 | 0 | python,macos,numpy | 24,214,946 | 1 | true | 0 | 0 | From our conversation in chat and adding path to .bashrc not working:
Putting:
/usr/local/bin first in /etc/paths will resolve the issue | 1 | 1 | 1 | When I run 'pip freeze' it shows that numpy==1.8.1; however, when I start Python and import numpy and then check the version number via numpy.version.version I get 1.6.
This is confusing to me and it's also creating a problem for scipy and matplotlib. For example, when I attempt to do the following import 'from matplot... | Mac OS Mavericks numpy Version Issue | 1.2 | 0 | 0 | 469 |
24,218,114 | 2014-06-14T08:34:00.000 | 0 | 0 | 0 | 0 | python,sockets,tcp,timer | 24,218,375 | 1 | false | 0 | 0 | How about using a token that is switched when the client connects? Put it in a while loop and if the token is ever the same non-switched value twice in a row kill the loop and stop listen(). | 1 | 0 | 0 | I'll explain you better my problem.
I've code a simple python server who listening for web client connection.
The server is running but i must add a function and i don't know how resolve this..
I must set up a timer, if the client don't connect every N seconds, I've to log it.
I already looked for set up a timeout bu... | Python set up a timer for client connection | 0 | 0 | 1 | 458 |
24,224,539 | 2014-06-14T21:38:00.000 | 1 | 0 | 0 | 1 | python,ios,tornado | 24,232,201 | 1 | true | 1 | 0 | You can send your response with either self.write() or self.finish() (the main difference is that with write() you can assemble your response in several pieces, while finish() can only be called once. You also have to call finish() once if you're using asynchronous functions that are not coroutines, but in most cases ... | 1 | 1 | 0 | So far I have a pretty basic server (I haven't built in any security features yet, like cookie authentication). What I've got so far is an iOS app where you enter a username and password and those arguments are plugged into a URL and passed to a server. The server checks to see if the username is in the database and th... | What's the proper Tornado response for a log in success? | 1.2 | 0 | 0 | 246 |
24,227,510 | 2014-06-15T07:34:00.000 | 1 | 0 | 0 | 1 | python,google-app-engine,google-cloud-datastore | 24,227,785 | 2 | false | 1 | 0 | You can't, that's not what it's for at all. It's only for very broad-grained statistics about the number of each types in the datastore. It'll give you a rough estimate of how many Person objects there are in total, that's all. | 1 | 0 | 0 | How can I use Google Cloud Datastore stats object (in Python ) to get the number of entities of one kind (i.e. Person) in my database satisfying a given constraint (i.e. age>20)? | How to use Google Cloud Datastore Statistics | 0.099668 | 1 | 0 | 68 |
24,227,779 | 2014-06-15T08:17:00.000 | 0 | 0 | 0 | 0 | php,python,mysql,wamp | 24,228,304 | 1 | false | 0 | 0 | I'd comment, but I don't have enough rep. yet. You should be able to start the Apache and PHP services separately from the WAMP tray icon. If you can't, try this:
You should be able to use the WAMP menu on the tray icon to open WAMP's my.ini file. In there, just change the port number from 3306 to something else (mi... | 1 | 1 | 0 | I have a script in Python that retrieves data from a remote server into a MySQL database located on my computer (the one that runs the Python script).
This script is executed daily to retrieve fresh data into the MySQL database. I am using Workbench 6.0 for Windows 64.
I want to add a web GUI to the system that will pr... | Python and PHP use the same mySQL database | 0 | 1 | 0 | 1,052 |
24,229,203 | 2014-06-15T11:37:00.000 | 1 | 0 | 1 | 1 | python,google-app-engine | 45,396,993 | 7 | false | 1 | 0 | YES! Google App engine supports python v3, you need to set up flexible environments.
I got a chance to deploy my application on app engine and It's using python 3.6 runtime and works smoothly... :) | 1 | 50 | 0 | I started learning Python 3.4 and would like to start using libraries as well as Google App Engine, but the majority of Python libraries only support Python 2.7 and the same with Google App Engine.
Should I learn 2.7 instead or is there an easier way? (Is it possible to have 2 Python versions on my machine at the same ... | Does Google App Engine support Python 3? | 0.028564 | 0 | 0 | 20,010 |
24,230,147 | 2014-06-15T13:38:00.000 | 2 | 0 | 0 | 0 | python,django,caching,varnish | 24,230,332 | 1 | true | 1 | 0 | Varnish is a caching HTTP reverse proxy. It's always in front of your server. However Redis is a key-value store. So they are not located in the same level. For me, I use redis to store builded objects, result of DB queries, and varnish for static pages (Don't cache your dynamic content with Varnish this will cause a l... | 1 | 0 | 0 | I've read up on some documentation and had a few questions.
I am aware we can use redis as a cache backend for Django. We can then use the decorators in Django's cache framework to cache certain views. I understand to this point but I've learned about a HTTP accelerator called Varnish.
How does Varnish work if used wit... | Caching in Django: Redis + Django & Varnish | 1.2 | 0 | 0 | 739 |
24,231,504 | 2014-06-15T16:05:00.000 | 4 | 0 | 0 | 0 | python,django,python-2.7,networkx | 24,231,580 | 1 | true | 1 | 0 | You could simply install it as a global variable. Call the function that loads it in a module-level context and import that module when you need it (or use a singleton pattern that loads it on first access, but it's basically the same thing).
You should never use a global variable in a webapp if you expect to alter the... | 1 | 2 | 0 | The scenario: I have a Networkx network with around 120.000 edges which I need to query each time a user requests a page or clicks something on the page, so a lot of calls.
I could load and parse the network each call, but that would be a waste of time as that would take around 4 seconds each time (excluding the queryi... | Django large variable storage | 1.2 | 0 | 1 | 118 |
24,232,701 | 2014-06-15T18:23:00.000 | 6 | 0 | 0 | 0 | python,python-2.7,pandas,offset | 24,232,729 | 1 | true | 0 | 0 | You can shift A column first:
df['A'].shift(-1) - df['B'] | 1 | 5 | 1 | I have a data frame in which column A is the start time of an activity and column B is the finish time of that activity, and each row represents an activity (rows are arranged chronologically). I want to compute the difference in time between the end of one activity and the start of the next activity, i.e. df[i+1][A] ... | Pandas diff() functionality on two columns in a dataframe | 1.2 | 0 | 0 | 5,331 |
24,233,264 | 2014-06-15T19:25:00.000 | 1 | 1 | 0 | 1 | python,linux,bash,raspberry-pi,cp | 24,233,353 | 3 | false | 0 | 0 | you can use rsync, which can be used pretty much like cp is used, but offers an option for progress indicator. It is sent to standard out, and you ought to be able to intercept it for your own fancies. | 1 | 0 | 0 | Is there a way to poll the cp command to get its current progress? I understand there's a modified/Advanced copy utility that adds a small little ASCII progress bar, but I want to build my own progress bar using led lights and whatnot, and need to be able to see the current percentage of the file activity in order to d... | Poll the linux cp command to GET progress | 0.066568 | 0 | 0 | 606 |
24,235,268 | 2014-06-16T00:23:00.000 | 1 | 0 | 1 | 0 | python,list,max | 24,235,302 | 9 | false | 0 | 0 | Sounds like homework to me, but perhaps some logics can help you out:
when you iterate the list, the point is that you want to know whether the current element is the MAX of all others. This can be solved by keeping the MAX up to the current element (say M*) and do a simple comparison between M* and your current elemen... | 1 | 0 | 0 | I need to find the max value of a list but I can't use the max() method. How would I go about doing this? I'm just a beginner so I'm sure this is pretty easy to find a workaround, however I'm stumped.
Edit: Forgot to mention that it's python I'm working in. | max value of list without max() method | 0.022219 | 0 | 0 | 35,265 |
24,236,079 | 2014-06-16T02:53:00.000 | 5 | 1 | 1 | 0 | python,numpy | 24,236,471 | 2 | true | 0 | 0 | You can use Cython to compile the bottlenecks to C. This is very effective for numerical code where you have tight loops. Python loops add quite a lot of overhead, that is non-existent if you can translate things to pure C. In general, you can get very good performance for any statically typed code (that is, your types... | 1 | 3 | 0 | I have written a small scientific experiment in Python, and I now need to consider optimizing this code. After profiling, what tools should I consider in order to improve performance. From my understanding, the following wouldn't work:
Psyco: out of date (doesn't support Python 2.7)
Pyrex: last update was in 2010
Pypy:... | As of June 2014, what tools should one consider for improving Python code performance? | 1.2 | 0 | 0 | 165 |
24,237,335 | 2014-06-16T05:54:00.000 | 1 | 0 | 1 | 0 | c#,python,.net,share,shared-objects | 24,281,523 | 2 | false | 0 | 1 | Since python is running as another process. This is no way for python to access object in c# directly since process isolation.
A way of marshal and un-marshal should be included to communicate between processes.
There are many way to communicate between processes. Share memory, file, TCP and so on. | 2 | 3 | 0 | I have created a windows app which runs a python script. I'm able to capture the output of the script in textbox.
Now i need to pass a shared object to python script as an argument from my app.
what type of shared object should i create so that python script can accept it and run it or in simple words how do i create s... | shared object in C# to be used in python script | 0.099668 | 0 | 0 | 912 |
24,237,335 | 2014-06-16T05:54:00.000 | 1 | 0 | 1 | 0 | c#,python,.net,share,shared-objects | 32,651,105 | 2 | false | 0 | 1 | 5.4. Extending Embedded Python
will help you to access the application object.
In this case both application and python running in single process. | 2 | 3 | 0 | I have created a windows app which runs a python script. I'm able to capture the output of the script in textbox.
Now i need to pass a shared object to python script as an argument from my app.
what type of shared object should i create so that python script can accept it and run it or in simple words how do i create s... | shared object in C# to be used in python script | 0.099668 | 0 | 0 | 912 |
24,238,274 | 2014-06-16T07:09:00.000 | 0 | 0 | 1 | 0 | python,shapefile,gdal | 24,384,358 | 1 | true | 0 | 0 | Problem solved while using the pyshp module, along with copyfile for projections and list to input and output each set of coordinates, fields and records... | 1 | 0 | 0 | I will detail my problem here..
I have a polyline-shapefile, which I have successfully read into python using pyshp module.
My problem is to save the 2nd node of every line feature into a separate, single point file. I have successfully been able to retrieve the 2nd node, using
for i in range(len(shapRecs)):
... | Copy queried attributes of a shapefile to a new shapefile | 1.2 | 0 | 0 | 250 |
24,239,875 | 2014-06-16T08:54:00.000 | 0 | 0 | 1 | 0 | python,timer,continue | 24,242,953 | 1 | true | 0 | 0 | If I've correctly undestood your problem, you want something to count how long the application is opened, and pausing all the time the application is minimized. For that, you do not need to use any sleep. You simply react to events, noting the time the event occurs and cumulating open time. In pseudo code, it gives :
... | 1 | 0 | 0 | How to create Python timer with Stop, Pause and Continue functions without using "time" module, especially time.sleep() because my programm freezes after this function?
Thank you
To be more specific what i am trying to acchieve , I want to create an inapplication script that counts for how long was the programm opened.... | Python timer with Stop Pause and Continue without using time module | 1.2 | 0 | 0 | 1,053 |
24,243,891 | 2014-06-16T12:35:00.000 | 0 | 0 | 0 | 1 | python,google-app-engine,python-2.7 | 24,250,751 | 2 | false | 0 | 0 | If you are running your app from the terminal, using dev_appserver.py try using the --skip_sdk_update_check switch, it may be the SDK update check that is failing. | 1 | 0 | 0 | I trying to run a hello world app on my device environment using ga and Python, however even not doing any explicit url request, the urllib2 is having some problems with my proxy server.
I tried adding the localhost to the list of exclusion and it didn't work. If I disable the proxy on machine it works perfectly.
How... | Need to ignore proxy without disabling it on control panel | 0 | 0 | 1 | 27 |
24,247,829 | 2014-06-16T16:03:00.000 | 0 | 0 | 0 | 0 | python,angularjs,flask | 24,302,497 | 1 | true | 1 | 0 | You should give user just a link to download this data and convert it to JSON on your backend. Don't do this on frontend, because you don't do any post-processing things on frontend.
Make an url for your query view with postfix like '/csv' and make a view for it. | 1 | 0 | 0 | I have a Flask application performs an API query to a database, which returns a typically large JSON file (around 20-50MB). My intentions are to convert this JSON response into csv data, and return this back to the frontend, which should then prompt the user to download the file. The conversion part I have handled, but... | Flask send large csv to angularJS frontend to download | 1.2 | 0 | 0 | 540 |
24,249,626 | 2014-06-16T18:07:00.000 | 0 | 0 | 0 | 0 | android,python,django,twitter-bootstrap,titanium | 24,252,267 | 1 | false | 1 | 0 | Titanium is a platform in which you can create mobile apps using JavaScript as your main language. However it doesn't use HTML and CSS to render UI of your app. You are creating different view objects by calling Ti.UI.create* methods which Titanium translates to native objects. This way look&feel of your app will be as... | 1 | 0 | 0 | I am working on building a web interface, Android and iOS applications for the same application.
I have my web interface in Django. There is a multi agent system built using Python in the backend, to which I send and receive messages using zeromq from the django application. The Django application uses bootstrap for t... | Using Django as server (backend) for Titanium mobile application? | 0 | 0 | 0 | 222 |
24,249,796 | 2014-06-16T18:20:00.000 | 0 | 0 | 1 | 0 | python,exception,exception-handling | 24,249,840 | 4 | false | 0 | 0 | how does the caller of something know if that something would throw an exception or not?
By reading the documentation for that something. | 2 | 0 | 0 | In the Java world, we know that the exceptions are classified into checked vs runtime and whenever something throws a checked exception, the caller of that something will be forced to handle that exception, one way or another. Thus the caller would be well aware of the fact that there is an exception and be prepared/co... | In python how does the caller of something know if that something would throw an exception or not? | 0 | 0 | 0 | 75 |
24,249,796 | 2014-06-16T18:20:00.000 | 0 | 0 | 1 | 0 | python,exception,exception-handling | 24,249,818 | 4 | false | 0 | 0 | As far as I know Python (6 years) there isn't anything similar to Java's throws keyword in Python. | 2 | 0 | 0 | In the Java world, we know that the exceptions are classified into checked vs runtime and whenever something throws a checked exception, the caller of that something will be forced to handle that exception, one way or another. Thus the caller would be well aware of the fact that there is an exception and be prepared/co... | In python how does the caller of something know if that something would throw an exception or not? | 0 | 0 | 0 | 75 |
24,250,152 | 2014-06-16T18:44:00.000 | 2 | 0 | 1 | 0 | python,metadata,categories,pelican | 24,419,741 | 1 | false | 0 | 0 | You might try adding a key/value dictionary to your Pelican settings file that contains your category metadata, and then access that information from within your theme's index.html template. | 1 | 4 | 0 | I want to organize a blog into multiple categories. For each category index page I want to add some metadata like title, description, meta etc. specific to the category.
Pelican uses folders to split posts into categories but how do I define the metadata for each category? Is it possible to use a metadata file to put i... | pelican blog define metadata for category index page | 0.379949 | 0 | 0 | 590 |
24,254,300 | 2014-06-17T01:00:00.000 | 0 | 0 | 0 | 1 | python,django,deployment | 24,258,210 | 2 | false | 1 | 0 | I know some of this tip can be obvious but never knows:
Do you update all your settings in settings.py ? (paths to static files, path to project...)
Wich server are you using ? django server ? apache ? nginx ?
Do you have permissions over all file in the project ? You should check that the owner of the files is the us... | 1 | 0 | 0 | I hope you can help me.
I have been building this webshop for the company I work for with Django and Lightning Fast Shop.
It's basically finished now and I have been running it of a virtual ubuntu machine on my PC. Since it got annoying leaving my PC on the entire time, so others could access the site, I wanted to de... | Copying Django project to root server is not working | 0 | 0 | 0 | 103 |
24,256,518 | 2014-06-17T05:45:00.000 | 1 | 0 | 1 | 0 | python,trace32 | 26,437,728 | 1 | false | 0 | 0 | What you intend is to read register values from target under test in Trace32 using python, correct me if
I am wrong.
If my understanding is right, then what you intend can be achieved. api_remote.pdf help document can be found in the installation folder of Trace32. In this document hlinknet.c and hremote.c files are m... | 1 | 1 | 0 | I want to run a .cmm file that reads the register values in kernel in TRACE32 and i want to initiate that using python so that data analysis becomes easy. Kindly help me with the procedure and commands to do so | Running TRACE32 using python | 0.197375 | 0 | 0 | 2,360 |
24,257,803 | 2014-06-17T07:16:00.000 | 12 | 0 | 0 | 1 | python,google-app-engine,installation,pip,distutils | 37,644,135 | 8 | false | 1 | 0 | Another solution* for Homebrew users is simply to use a virtualenv.
Of course, that may remove the need for the target directory anyway - but even if it doesn't, I've found --target works by default (as in, without creating/modifying a config file) when in a virtual environment.
*I say solution; perhaps it's just anot... | 3 | 147 | 0 | I've been usually installed python packages through pip.
For Google App Engine, I need to install packages to another target directory.
I've tried:
pip install -I flask-restful --target ./lib
but it fails with:
must supply either home or prefix/exec-prefix -- not both
How can I get this to work? | DistutilsOptionError: must supply either home or prefix/exec-prefix -- not both | 1 | 0 | 0 | 56,894 |
24,257,803 | 2014-06-17T07:16:00.000 | 2 | 0 | 0 | 1 | python,google-app-engine,installation,pip,distutils | 48,954,780 | 8 | false | 1 | 0 | If you're using virtualenv*, it might be a good idea to double check which pip you're using.
If you see something like /usr/local/bin/pip you've broken out of your environment. Reactivating your virtualenv will fix this:
VirtualEnv: $ source bin/activate
VirtualFish: $ vf activate [environ]
*: I use virtualfish, but I ... | 3 | 147 | 0 | I've been usually installed python packages through pip.
For Google App Engine, I need to install packages to another target directory.
I've tried:
pip install -I flask-restful --target ./lib
but it fails with:
must supply either home or prefix/exec-prefix -- not both
How can I get this to work? | DistutilsOptionError: must supply either home or prefix/exec-prefix -- not both | 0.049958 | 0 | 0 | 56,894 |
24,257,803 | 2014-06-17T07:16:00.000 | 24 | 0 | 0 | 1 | python,google-app-engine,installation,pip,distutils | 45,668,067 | 8 | false | 1 | 0 | On OSX(mac), assuming a project folder called /var/myproject
cd /var/myproject
Create a file called setup.cfg and add
[install]
prefix=
Run pip install <packagename> -t . | 3 | 147 | 0 | I've been usually installed python packages through pip.
For Google App Engine, I need to install packages to another target directory.
I've tried:
pip install -I flask-restful --target ./lib
but it fails with:
must supply either home or prefix/exec-prefix -- not both
How can I get this to work? | DistutilsOptionError: must supply either home or prefix/exec-prefix -- not both | 1 | 0 | 0 | 56,894 |
24,258,400 | 2014-06-17T07:47:00.000 | 0 | 0 | 0 | 0 | android,python,sl4a,ase | 24,258,557 | 2 | true | 1 | 0 | The ADT could make an easy transfer between PC and android. But you could use wifi keyboard or some app like this, and write in android directly. Also, debuging on PC is a pain, emulated android is slow and error prone for third party like SL4A; the best/fastest is remote control but run script on android. I use a ssh ... | 1 | 0 | 0 | Is there a way to write Python scripts for SL4A (ASE) on P.C. and then deploy it on the hardware? I'm new to this and I could write the basic scripts on the device but writing long scripts on phone is tedious. Is there a support for that?
Thanks in advance! | SL4A Scripting on P.C | 1.2 | 0 | 0 | 621 |
24,262,946 | 2014-06-17T11:45:00.000 | 0 | 0 | 0 | 0 | django,python-2.7,django-forms,django-views | 24,264,757 | 1 | true | 1 | 0 | There is no "right" here. Forms can be defined in either views.py or forms.py (calling it "forms.py" is merely a naming convention that has been widely adopted). It really comes down to personal preference.
Larger projects will likely benefit by keeping forms separate (if only to keep things less cluttered). | 1 | 0 | 0 | Is it right to write django forms inside views.py or should i keep 2 separate files
views.py
forms.py
Which is the right convention ? I have seen different projects following these two convensions | Writing Django forms and views | 1.2 | 0 | 0 | 74 |
24,263,981 | 2014-06-17T12:35:00.000 | 1 | 0 | 1 | 0 | python,multithreading,list | 24,264,391 | 2 | false | 0 | 0 | So long as each thread operates on different items in the list, then there will be no data races.
However, if you can partition the data off so cleanly, wouldn't it make more sense for each thread to operate on its own private data? Why have a list, visible outside the worker threads, containing items that are private... | 1 | 0 | 0 | If I have a list of say 4 items in python and each thread accesses only 1 item in the list, for example thread 1 assigned to the first item, thread 2 assigned to the 2nd item etc... will I have race conditions? do I need to use mutexes?
edit: I meant modify sorry, each thread will modify 1 item in the list. I added I w... | If I have 4 threads each accessing only 1 element of a list will I run into race conditions? | 0.099668 | 0 | 0 | 112 |
24,268,634 | 2014-06-17T16:11:00.000 | 2 | 0 | 1 | 0 | python | 24,268,970 | 1 | true | 0 | 1 | Segmentation Fault is an system error, which occurs when your program tries to access wrong memory address. It is internal program problem and you cannot continue process. It could be possible, but believe me, you should not. So, you should fix it.
To fix it, you should dig into Qt internals, but I'd like to suggest yo... | 1 | 1 | 0 | Pretty self-explanatory from the title. I'm using PyQt4 to crawl pages and I occasionally get a SegFault error.
The overall program seems to still be working regardless though, so all I want to do is prevent that "Segmentation Fault (core dumped)" error from being shown on the console. How is this done? | "Segmentation Fault" being thrown by third party package. How to prevent it from displaying on console? | 1.2 | 0 | 0 | 205 |
24,269,245 | 2014-06-17T16:46:00.000 | 0 | 0 | 0 | 0 | python,web-scraping,scrapy | 24,275,158 | 2 | false | 1 | 0 | It sure can, there is multiple way:
Add SgmlLinkextractor to follow that next link.
Or make Request in your function, like yield(Request(url))
In your case url = erthdata.---.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=21&SID=d89sduisd&excludeEventConfig=ExcludeIfFromFullRecPage&page=1&doc=4&cacheurlF... | 1 | 0 | 0 | Can scrapy save a web page, follow the next button and save the next web page etc., in a series of search results? It always needs to follow the "next" button and nothing else.
This is the url (obfuscated) that links to the next page:
erthdata.---.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=21&SID=d89s... | Can scrapy step through a website by following "next" button | 0 | 0 | 0 | 124 |
24,269,552 | 2014-06-17T17:04:00.000 | 4 | 0 | 1 | 0 | python,windows,vim | 24,270,897 | 1 | true | 0 | 0 | You can try renaming / symlinking python34.dll to python32.dll; if they are fully binary-compatible, this might work. But it is expected (and safer) to recompile Vim whenever your Python (or Perl, or any other language integration for that matter) version changes (which shouldn't be too often). | 1 | 1 | 0 | I'm beginning my journey into Vim and have run into a snag in attempts to turning it into my primary Python IDE. I'm using Vim v7.4 (latest) in addition to the python-mode plugin. Issue is that while this version of Vim is compiled with +python/dyn and +python3/dyn, it's pointing to python32.dll instead of python34.dll... | Point Vim to updated Python version instead of recompiling | 1.2 | 0 | 0 | 305 |
24,269,715 | 2014-06-17T17:16:00.000 | 2 | 0 | 1 | 0 | python,python-3.x,python-2.x | 24,269,948 | 2 | false | 0 | 0 | No, type and class means the same.
Though, builtin types and C-extension (interpreter extension at all, like Java classes in Jython) may be treated a little differently, for example you may not be able to monkey-patch it. In old versions of CPython there was also an issue with subclassing builtins, but that was so long... | 1 | 5 | 0 | I'm reading a Python book and it always speaks about "given X its type is Y", so I'm getting confused.
Is there any difference between asking the type of an object and the class of membership of an object in python2 and python3?
I mean, are type and class two different concepts?
This question comes from the fact that ... | Is there any difference between type and class? | 0.197375 | 0 | 0 | 131 |
24,271,006 | 2014-06-17T18:36:00.000 | 0 | 1 | 0 | 0 | python,django,caching,django-rest-framework | 24,293,403 | 1 | false | 1 | 0 | One technique is to key the URLs on the content of the media they are referring too. For example if you're hosting images then use the sha hash of the image file in the url /images/<sha>.
You can then set far-future cache expiry headers on those URLs. If the image changes then you also update the URL referring to it,... | 1 | 1 | 0 | Using Python's Django (w/ Rest framework) to create an application similar to Twitter or Instagram.
What's the best way to deal with caching content (JSON data, images, etc.) considering the constantly changing nature of a social network? How to still show updated state a user creates a new post, likes/comments on a po... | Handling Cache with Constant Change of Social Network | 0 | 0 | 0 | 83 |
24,279,321 | 2014-06-18T07:19:00.000 | 1 | 0 | 1 | 0 | python,virtualenv | 24,279,522 | 1 | true | 0 | 0 | Delete or rename the file /virtualenv_root/lib/python3.4/no-global-site-packages.txt
OR
Add a symlink between /virtualenv_root/lib/python3.4/site-packages/ and /path/to/desired/site-packages/
Here virtualenv_root is the name of your virtual environment. | 1 | 0 | 0 | How can a virtualenv be modified after it is created so as to achieve the same effect as creating it with virtualenv --system-site-packages? In other words, how to enable accessing any systemwide installed packages in a virtualenv which was originally created with that access disabled? | How to modify virtualenv to achieve the same effect as --system-site-packages? | 1.2 | 0 | 0 | 76 |
24,279,336 | 2014-06-18T07:19:00.000 | 1 | 0 | 0 | 0 | python,django,mongoengine,flask-mongoengine,django-mongodb-engine | 24,280,473 | 3 | false | 1 | 0 | Django MongoEngine aim is to provide better integration with Django - however currently (June 2014) its not stable and the readme says
DO NOT CLONE UNTIL STABLE
So beware! | 2 | 1 | 0 | What are the differences between the Mongoengine, flask-MongoEngine and Django-MongoEngine projects?
I am using Mongoengine in my Django project. Will I get any benefits if I use Django-MongoEngine instead? | Difference among Mongoengine, flask-MongoEngine and Django-MongoEngine? | 0.066568 | 0 | 0 | 1,114 |
24,279,336 | 2014-06-18T07:19:00.000 | 0 | 0 | 0 | 0 | python,django,mongoengine,flask-mongoengine,django-mongodb-engine | 58,571,661 | 3 | false | 1 | 0 | Django framework provides a unified unified interface to connect to a Database backend which is usually an SQL based database such as SQLite or Postgresql. That means that the developer does not have to worry about writing code specific to the database technology used, but defines Models and perform transactions and ru... | 2 | 1 | 0 | What are the differences between the Mongoengine, flask-MongoEngine and Django-MongoEngine projects?
I am using Mongoengine in my Django project. Will I get any benefits if I use Django-MongoEngine instead? | Difference among Mongoengine, flask-MongoEngine and Django-MongoEngine? | 0 | 0 | 0 | 1,114 |
24,282,955 | 2014-06-18T10:16:00.000 | 0 | 0 | 0 | 0 | python,firefox,selenium,amazon-web-services,amazon-ec2 | 26,747,525 | 1 | false | 0 | 0 | I was facing the same problem.
Running the scripts as root solved the problem.
Also making an user running the test a sudoer worked. | 1 | 1 | 0 | I am trying to run a python script in which I am opening a webpage and clicking on some element. But the script is running very slow and giving random exceptions .
Mostly it halts at line
driver = webdriver.Firefox()
Message -
selenium.common.exceptions.WebDriverException: Message: 'Can\'t load the profile. Profile ?... | Unable to run python selenium webdriver scripts over Amazon EC2 | 0 | 0 | 1 | 1,073 |
24,284,390 | 2014-06-18T11:30:00.000 | 3 | 0 | 0 | 0 | python,numpy,scipy,sympy | 24,289,392 | 2 | false | 0 | 0 | Although it would be nice if there were an existing routine for calculating the spherical Hankel functions (like there is for the ordinary Hankel functions), they are just a (complex) linear combination of the spherical Bessel functions of the first and second kind so can be easily calculated from existing routines. S... | 1 | 3 | 1 | I knew that there is no builtin sph_hankel1 in scipy then i want to know that how to implement it in the right way?
Additional: Just show me one correct implementation of sph_hankel1 either using of Scipy or Sympy. | How can i implement spherical hankel function of the first kind by scipy/numpy or sympy? | 0.291313 | 0 | 0 | 997 |
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