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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25,270,885 | 2014-08-12T17:48:00.000 | 0 | 0 | 1 | 1 | python,batch-file,python-3.x,cx-freeze | 33,244,651 | 3 | false | 0 | 0 | Make sure the Version of Python is correct, if you have more than one version on your computer, just simply type "python" in console to check the version of your python. I just had this problem earlier. | 2 | 26 | 0 | I am using python 3.4 at win-8. I want to obtain .exe program from python code. I learned that it can be done by cx_Freeze.
In MS-DOS command line, I wrote pip install cx_Freeze to set up cx_Freeze. It is installed but it is not working.
(When I wrote cxfreeze to command line, I get this warning:C:\Users\USER>cxfreez... | installing cx_Freeze to python at windows | 0 | 0 | 0 | 27,553 |
25,273,987 | 2014-08-12T21:03:00.000 | 1 | 0 | 0 | 0 | python,shapefile,qgis | 29,585,421 | 3 | false | 0 | 1 | QgsGeometry has the method wkbType that returns what you want. | 1 | 7 | 0 | I'm writing a script that is dependent on knowing the geometry type of the loaded shapefile.
but I've looked in the pyqgis cookbook and API and can't figure out how to call it.
infact, I have trouble interpreting the API, so any light shed on that subject would be appreciated.
Thank you | How to get shapefile geometry type in PyQGIS? | 0.066568 | 0 | 0 | 8,852 |
25,273,989 | 2014-08-12T21:03:00.000 | 9 | 0 | 0 | 0 | python,flask,global-variables | 25,274,042 | 1 | true | 1 | 0 | Generally speaking, global variables are shared between requests.
Some WSGI servers can use a new separate process for each request, but that is not an efficient way to scale your requests. Most will use treading or several child processes to spread the load but even in the case of separate child processes each subproc... | 1 | 2 | 0 | If I have global variables in flask and have multiple users accessing the site at once, can one persons session overwrite the global variables of another persons session, or does flask make a unique instance of my site and program code each time its requested from a users browser? | Flask global variables and sessions | 1.2 | 0 | 0 | 2,915 |
25,274,746 | 2014-08-12T21:57:00.000 | 1 | 0 | 1 | 0 | python,algorithm | 25,275,905 | 7 | false | 0 | 0 | I'm pretty sure python is not a good language to do this in, but if the length of distinct substrings you want to find is not small like 5 but larger like 1000 where your main string is very long, then a linear time solution to your problem is to build a suffix tree, you can read about them online. A suffix tree for a ... | 1 | 6 | 0 | Given a string i want to count how many substrings with len = 5 i have on it.
For example: Input: "ABCDEFG" Output: 3
And I'm not sure what should be the easiest and fast way to do this in python. Any idea?
Update:
I want only to count different substrings.
Input: "AAAAAA"
Substrings: 2 times "AAAAA"
Output: 1 | Counting the number of different 5 characters substrings inside a string | 0.028564 | 0 | 0 | 216 |
25,275,654 | 2014-08-12T23:19:00.000 | 1 | 0 | 0 | 0 | python,url,web-crawler,urllib2 | 25,275,720 | 2 | false | 1 | 0 | You can store the hash of the content of pages previously seen and check if the page has already been seen before continuing. | 1 | 1 | 0 | I am writing a web crawler, but I have a problem with function which recursively calls links.
Let's suppose I have a page: http://en.wikipedia.org/wiki/Stirling_numbers_of_the_second_kind.
I am looking for all links, and then open each link recursively, downloading again all links etc.
The problem is, that some links, ... | Predict if sites returns the same content | 0.099668 | 0 | 1 | 52 |
25,279,746 | 2014-08-13T06:48:00.000 | 2 | 0 | 1 | 1 | python,windows | 25,279,812 | 4 | false | 0 | 0 | Create a service that runs permanently.
Arrange for the service to have an IPC communications channel.
From your desktop python code, send messages to the service down that IPC channel. These messages specify the action to be taken by the service.
The service receives the message and performs the action. That is, ex... | 2 | 0 | 0 | I am writing a test application in python and to test some particular scenario, I need to launch my python child process in windows SYSTEM account.
I can do this by creating exe from my python script and then use that while creating windows service. But this option is not good for me because in future if I change anyth... | How to launch a python process in Windows SYSTEM account | 0.099668 | 0 | 0 | 1,368 |
25,279,746 | 2014-08-13T06:48:00.000 | 0 | 0 | 1 | 1 | python,windows | 25,281,143 | 4 | false | 0 | 0 | You could also use Windows Task Scheduler, it can run a script under SYSTEM account and its interface is easy (if you do not test too often :-) ) | 2 | 0 | 0 | I am writing a test application in python and to test some particular scenario, I need to launch my python child process in windows SYSTEM account.
I can do this by creating exe from my python script and then use that while creating windows service. But this option is not good for me because in future if I change anyth... | How to launch a python process in Windows SYSTEM account | 0 | 0 | 0 | 1,368 |
25,284,879 | 2014-08-13T11:25:00.000 | 1 | 0 | 1 | 1 | python,linux,pip | 25,284,972 | 2 | true | 0 | 0 | This sounds to me like a good approach but perhaps instead of placing the .desktop file in the system wide /usr/share/applications/ folder, you could place the file in the users applications folder at ~/.local/share/applications.
This would also not require elevated permissions to access the root owned /user directory ... | 1 | 8 | 0 | I have a python application that is supposed to be launchable via GUI so it has to have a .desktop file in /usr/share/applications/. The application only supports Linux. Normally, pip installs all files in one directory but it is possible to specify other locations (e.g. the .desktop file) in the setup.py using data_fi... | Install .desktop file with setup.py | 1.2 | 0 | 0 | 1,893 |
25,288,032 | 2014-08-13T13:52:00.000 | 1 | 0 | 1 | 0 | python,python-2.7,nlp,nltk | 25,298,846 | 1 | true | 0 | 0 | The way how topic modelers usually pre-process text with n-grams is they connect them by underscore (say, topic_modeling or white_house). You can do that when identifying big rams themselves. And don't forget to make sure that your tokenizer does not split by underscore (Mallet does if not setting token-regex explicitl... | 1 | 0 | 1 | Background: I got a lot of text that has some technical expressions, which are not always standard.
I know how to find the bigrams and filter them.
Now, I want to use them when tokenizing the sentences. So words that should stay together (according to the calculated bigrams) are kept together.
I would like to know if... | Python NLTK tokenizing text using already found bigrams | 1.2 | 0 | 0 | 317 |
25,288,653 | 2014-08-13T14:20:00.000 | 6 | 0 | 1 | 0 | python,python-2.7,comparison,operators | 25,288,736 | 2 | false | 0 | 0 | That's just division. And, at least for integers a >= 0 and b > 0, a/b is truthy if a>=b. Because, in that scenario, a/b is a strictly positive integer and bool() applied to a non-zero integer is True.
For zero and negative integer arguments, I am sure that you can work out the truthiness of a/b for yourself. | 1 | 6 | 0 | I recently got into code golfing and need to save as many characters as possible.
I remember seeing someone say to use if a/b: instead of if a<=b:. However, I looked through Python documentation and saw nothing of the sort.
I could be remembering this all wrong, but I'm pretty sure I've seen this operator used and reco... | Using '/' as greater than less than in Python? | 1 | 0 | 0 | 482 |
25,294,601 | 2014-08-13T19:32:00.000 | 2 | 0 | 0 | 0 | python,biopython,blast,ncbi | 25,295,081 | 1 | false | 0 | 0 | If you want to use BLAT online, there's not such tool as Bio.Blast.NCBIWWW.
If you want to use BLAT locally, there's not such tool as Bio.Blast.NCBIStandalone
The good news are that you can install BLAT locally and use the subprocess library to call BLAT, and Biopython provides the Bio.SearchIO.BlatIO to parse the out... | 1 | 0 | 0 | I'd like to run several BLAT queries with different sequences and then perform a multiple sequence alignment on the results.
How can I use Python to run these BLAT queries?
I know that there is a way to use BLAST, but I am not sure about BLAT. | Using Biopython to run a BLAT search through NCBI | 0.379949 | 0 | 0 | 982 |
25,297,446 | 2014-08-13T22:47:00.000 | 1 | 0 | 1 | 0 | python,recursion | 25,297,640 | 7 | false | 0 | 0 | Note: This answer is limited to your topmost question, i.e. "Is it advisable to write recursive functions in Python?".
The short answer is no, it's not exactly "advisable". Without tail-call optimization, recursion can get painfully slow in Python given how intensive function calls are on both memory and processor time... | 3 | 10 | 0 | I have written a verilog (logic gates and their connectivity description basically) simulator in python as a part of an experiment.
I faced an issue with the stack limit so I did some reading and found that Python does not have a "tail call optimization" feature (i.e. removing stack entries dynamically as recursion pro... | Is it advisable to write recursive functions in Python | 0.028564 | 0 | 0 | 1,765 |
25,297,446 | 2014-08-13T22:47:00.000 | 0 | 0 | 1 | 0 | python,recursion | 25,298,141 | 7 | false | 0 | 0 | I use sys.setrecursionlimit to set the recursion limit to its maximum possible value because I have had issues with large classes/functions hitting the default maximum recursion depth. Setting a large value for the recursion limit should not affect the performance of your script, i.e. it will take the same amount of ti... | 3 | 10 | 0 | I have written a verilog (logic gates and their connectivity description basically) simulator in python as a part of an experiment.
I faced an issue with the stack limit so I did some reading and found that Python does not have a "tail call optimization" feature (i.e. removing stack entries dynamically as recursion pro... | Is it advisable to write recursive functions in Python | 0 | 0 | 0 | 1,765 |
25,297,446 | 2014-08-13T22:47:00.000 | 3 | 0 | 1 | 0 | python,recursion | 25,297,631 | 7 | false | 0 | 0 | A lot depends on the specific nature of the recursive solution you're trying to implement. Let me give a concrete example. Suppose you want the sum of all values in a list. You can set the recursion up by adding the first value to the sum of the remainder of the list - the recursion should be obvious. However, the ... | 3 | 10 | 0 | I have written a verilog (logic gates and their connectivity description basically) simulator in python as a part of an experiment.
I faced an issue with the stack limit so I did some reading and found that Python does not have a "tail call optimization" feature (i.e. removing stack entries dynamically as recursion pro... | Is it advisable to write recursive functions in Python | 0.085505 | 0 | 0 | 1,765 |
25,298,281 | 2014-08-14T00:26:00.000 | 2 | 0 | 0 | 0 | python,excel,com,win32com | 25,308,893 | 1 | true | 0 | 1 | When an application registers itself, only the first instance gets registered, until it dies and then the very next instance to register gets registered.
There's no registration queue, so when your first instance dies, the second keeps unregistered, so any call to Excel.Application will launch a third instance and they... | 1 | 3 | 0 | I am using python to parse an Excel file and am accessing the application COM using excel = Dispatch('Excel.Application') at the beginning of a restart the code will find the application object just fine and I will be able to access the active workbook.
The problem comes when I have had two instances of Excel open an... | win32com dispatch Won't Find Already Open Application Instance | 1.2 | 1 | 0 | 1,075 |
25,299,681 | 2014-08-14T03:40:00.000 | 4 | 0 | 0 | 1 | python,google-app-engine,http-status-code-413 | 25,311,367 | 1 | true | 1 | 0 | Looks like it was because I was making a GET request. Changing it to POST fixed it. | 1 | 3 | 0 | I've implemented an app engine server in Python for processing html documents sent to it. It's all well and good when I run it locally, but when running off the App engine, I get the following error:
"413. That’s an error. Your client issued a request that was too large. That’s all we know."
The request is only 155KB, ... | Google App Engine 413 error (Request Entity Too Large) | 1.2 | 0 | 0 | 5,558 |
25,302,979 | 2014-08-14T08:04:00.000 | 0 | 0 | 0 | 1 | python,ftp,ftplib | 25,303,266 | 1 | true | 0 | 0 | It seems that it uses, per default, two connections (one for sending commands, one for datatransfer?).
That's how ftp works. You have a control connection (usually port 21) for commands and a data connection for data transfer, file listing etc and a dynamic port.
However my ftpserver only accepts one connection at an... | 1 | 0 | 0 | I have a bit of a problem with the ftplib from python. It seems that it uses, per default, two connections (one for sending commands, one for datatransfer?). However my ftpserver only accepts one connection at any given time. Since the only file that needs to be transfered is only about 1 MB large, the reasoning of bei... | python ftpclient limit connections | 1.2 | 0 | 1 | 691 |
25,312,626 | 2014-08-14T16:04:00.000 | 3 | 0 | 0 | 0 | python,django,model-view-controller | 25,312,789 | 6 | false | 1 | 0 | Just check that the object retrieved by the primary key belongs to the requesting user. In the view this would be
if some_object.user == request.user:
...
This requires that the model representing the object has a reference to the User model. | 1 | 5 | 0 | I'm new to the web development world, to Django, and to applications that require securing the URL from users that change the foo/bar/pk to access other user data.
Is there a way to prevent this? Or is there a built-in way to prevent this from happening in Django?
E.g.:
foo/bar/22 can be changed to foo/bar/14 and expos... | How to prevent user changing URL to see other submission data Django | 0.099668 | 0 | 0 | 3,945 |
25,315,082 | 2014-08-14T18:26:00.000 | 0 | 0 | 1 | 0 | python,macos,io,ipython | 25,315,127 | 2 | false | 0 | 0 | In the Terminal find out the process id using the "top" command. It is the PID column, and under the COMMAND column you will see IPython, or something similar.
Them run kill -9 PID | 1 | 3 | 0 | I'm using iPython to control some other equipment connected to my Mac. Most of the time it runs fine, but sometimes I gave a wrong command to the equipment, iPython is just hanging forever since it's waiting for a response but won't get one, so I need a way to kill the iPython process. ctrl+c doesn't do anything, it ju... | How to kill a running iPython process | 0 | 0 | 0 | 17,768 |
25,315,217 | 2014-08-14T18:34:00.000 | -2 | 0 | 1 | 0 | python,python-2.7 | 25,315,304 | 2 | false | 0 | 0 | __name__ belongs to the local scope (attribute) of the module that you call with python, ie: in this case manage.py. | 1 | 0 | 0 | My current understanding is that, when one writes from foo import bar, foo which is a package and has __init__.py, will have its __init__.py automatically processed after which its resource bar will be imported. If from the command prompt, I write python manage.py, and in that module call from foo import bar, in the __... | What is the value of __name__ when accessed in a __init__.py | -0.197375 | 0 | 0 | 908 |
25,318,344 | 2014-08-14T22:09:00.000 | 0 | 1 | 1 | 0 | php,python,struct | 35,089,240 | 3 | false | 0 | 0 | If you are trying to pass a null value from PHP to a Python dictionary, you need to use an empty object rather than an empty array.
You can define a new and empty object like $x = new stdClass(); | 1 | 11 | 0 | I cannot find how to write empty Python struct/dictionary in PHP. When I wrote "{}" in PHP, it gives me an error. What is the equivalent php programming structure to Python's dictionary? | What is the equivalent php structure to python's dictionary? | 0 | 0 | 0 | 6,548 |
25,319,035 | 2014-08-14T23:15:00.000 | 1 | 0 | 0 | 0 | javascript,python,ajax,websocket,flask | 25,319,136 | 1 | true | 1 | 0 | You have to store the current state on your server and when a page is requested, you have to build a page from your server that will show the current state.
When anything changes the current state (I don't know what actions can change the state as you haven't stated how that works), then you must update the state on th... | 1 | 1 | 0 | I have a web app with several AJAX call and from them it draws realtime graphs from the call. And the problem is that everytime we connect to the page, it start over and draw and make calls from there. I want everybody to share the same state of the page, not each person reloading and getting different values.
How do I... | AJAX and Javascript to display the same for everyone? | 1.2 | 0 | 0 | 29 |
25,320,342 | 2014-08-15T02:14:00.000 | 1 | 0 | 1 | 0 | python,cx-freeze | 25,331,281 | 1 | true | 0 | 0 | AFAIK, cx_Freeze doesn't use the description option, but it's a standard part of setup.py files, which use the same mechanism (distutils) that Python has for distributing packages.
I think the version field can be embedded in the executable, though. | 1 | 0 | 0 | I installed cx_Freeze a while ago, and recently froze my first program. In all the example setup scripts I've seen, the call to setup() contains several options, including things such as version and description. Why does cx_Freeze want a description of my program? What does it do with that information? Most importantly... | What does the description option in a cx_Freeze setup script do? | 1.2 | 0 | 0 | 97 |
25,321,391 | 2014-08-15T04:48:00.000 | 2 | 1 | 1 | 0 | python,lua | 25,321,438 | 2 | false | 0 | 0 | Leave your conditional empty by doing this
if <condition> then end | 1 | 1 | 0 | I've recently started learning Lua. The only other programming language I have some experience in is Python. In Python there is the "pass" function that does nothing. I was wondering what the equivalent (if any) of this would be in Lua. | Function that does nothing in Lua | 0.197375 | 0 | 0 | 3,469 |
25,325,004 | 2014-08-15T10:35:00.000 | 2 | 1 | 1 | 0 | python | 25,325,351 | 1 | true | 0 | 0 | *.pyd are compiled python extensions (on windows). *.lib are library modules used for building and linking with python itself. The *.h are C include files needed when you are creating your own extensions.
Generally these are all quite small and do not consume material disk space. I recommend you leave them alone. even ... | 1 | 1 | 0 | What are the purposes of *.pyd files in the DLLs directory, header files (*.h) in the include directory, and *.lib files in the libs directory? When I delete them it seems that at least some basic python code works properly. | Purposes of different files in python installation | 1.2 | 0 | 0 | 32 |
25,327,192 | 2014-08-15T13:24:00.000 | 1 | 0 | 0 | 0 | python,django,cookies,csrf,django-1.6 | 25,334,477 | 1 | true | 1 | 0 | I think we finally figured it out. The separate "CSRF_COOKIE_DOMAIN" for each environment (".beta.site.com", ".demo.site.com", etc.) stopped the cross-environment issues. We also ended up setting "CSRF_COOKIE_NAME" to "csrf_token" instead of the default "csrftoken" so that users with old csrftoken cookies weren't neg... | 1 | 4 | 0 | We've been experiencing issues with duplicate CSRF token cookies in Django in our most recent release. We just upgraded from Django 1.4 to 1.6 and we never had any issues back in 1.4. Basically, everything starts fine for each user, but at some point they end up having more than one CSRF token cookie and the browser ... | Issue with CSRF token cookies in Django 1.6 | 1.2 | 0 | 0 | 596 |
25,328,259 | 2014-08-15T14:28:00.000 | 0 | 0 | 1 | 0 | python | 25,328,446 | 5 | false | 0 | 0 | Something like gist.github.com or jsfiddle.net whould work, though they're both "cloudish". You could always create a local directory and use git or hg or some other distributed version control system to manage your code. That would be a good learning experience too. | 2 | 0 | 0 | I am learning with an online interpreter and would like to save bits of code in my Google drive. Is there a good way to do this so I can easily copy and paste my work back into a webpage. If there is a better way to save it that isn't in the cloud I would be interested in that as well. | How best to save python code? | 0 | 0 | 0 | 86 |
25,328,259 | 2014-08-15T14:28:00.000 | 0 | 0 | 1 | 0 | python | 25,328,332 | 5 | false | 0 | 0 | If you download or have a text editor ( something like Sublime text ) you can paste it into that, put in the syntax you are using so your code is highlighted. Save it via that. However if you want something online, use github or for simplicity dropbox. | 2 | 0 | 0 | I am learning with an online interpreter and would like to save bits of code in my Google drive. Is there a good way to do this so I can easily copy and paste my work back into a webpage. If there is a better way to save it that isn't in the cloud I would be interested in that as well. | How best to save python code? | 0 | 0 | 0 | 86 |
25,328,558 | 2014-08-15T14:44:00.000 | 4 | 0 | 1 | 0 | python,regex | 25,328,630 | 2 | true | 0 | 0 | I always use r"[\s\S]" all whitespace and non-whitespace, so everything. | 1 | 5 | 0 | My regexp needs both the default non-newline-matching dot and the re.DOTALL dot (. matches newline). I need several of the former and just one of the latter within a single regexp. Nevertheless, because I need one dot to match newlines, I have to use DOTALL, and use [^\n] several times to get the default "anything exce... | How to match anything (DOTALL) without DOTALL? | 1.2 | 0 | 0 | 347 |
25,334,643 | 2014-08-15T21:43:00.000 | 0 | 0 | 0 | 0 | python,sockets,networking,udp,frame-rate | 26,517,593 | 1 | false | 0 | 0 | It looks to me that the network is getting congested, transmitting old packets that got into the routers' queues and dropping the new packets.
Programming UDP is something of a black art — it requires reacting to network congestion when needed, and slowing down your sending rate. A simple solution would be to have the... | 1 | 3 | 0 | I have written an application in Python 2.7 and I'm using UDP sockets to implement networking capabilities. Though my application is not a game, I would consider it a game for networking purposes because the screen is redrawn 60 times per second.
I do not need extreme precision, so I don't need to send a ton of packets... | How often should UDP packets be sent? | 0 | 0 | 1 | 769 |
25,341,332 | 2014-08-16T14:53:00.000 | 0 | 0 | 0 | 0 | python,django,google-chrome,gunicorn | 25,341,679 | 1 | false | 1 | 0 | The session information, i.e. which user is logged in, is saved in a cookie, which is send from browser to server with each request. The cookie is set through the server with your login request.
For some reason, chrome does not send or save the correct cookie. If you have a current version of each browser, they should ... | 1 | 0 | 0 | i have a strange error with my website which created by django .
for the server i use gunicorn and nginx .yes it works well at first,when i use firefox to test my website.
i create an account ,login the user ,once i submit the data,the user get login .
one day i change to chrome to test my website ,i go to the login pa... | django website with gunicorn errror using chrome when login user | 0 | 0 | 0 | 211 |
25,344,239 | 2014-08-16T21:38:00.000 | 10 | 1 | 0 | 1 | python,rabbitmq,amqp,pika | 25,345,174 | 1 | true | 1 | 0 | Your code is fine logically, and runs without issue on my machine. The behavior you're seeing suggests that you may have accidentally started two consumers, with each one grabbing a message off the queue, round-robin style. Try either killing the extra consumer (if you can find it), or rebooting. | 1 | 3 | 0 | I'm testing out a producer consumer example of RabbitMQ using Pika 0.98. My producer runs on my local PC, and the consumer runs on an EC2 instance at Amazon.
My producer sits in a loop and sends up some system properties every second. The problem is that I am only seeing the consumer read every 2nd message, it's as t... | Python RabbitMQ - consumer only seeing every second message | 1.2 | 0 | 0 | 1,694 |
25,344,841 | 2014-08-16T23:09:00.000 | 1 | 1 | 1 | 1 | python,bash,filesystems,sys | 64,768,294 | 3 | false | 0 | 0 | sys.path and PATH are two entirely different variables. The PATH environment variable specifies to your shell (or more precisely, the operating system's exec() family of system calls) where to look for binaries, whereas sys.path is a Python-internal variable which specifies where Python looks for installable modules.
T... | 1 | 6 | 0 | I would like to access the $PATH variable from inside a python program. My understanding so far is that sys.path gives the Python module search path, but what I want is $PATH the environment variable. Is there a way to access that from within Python?
To give a little more background, what I ultimately want to do is... | sys.path vs. $PATH | 0.066568 | 0 | 0 | 1,684 |
25,345,130 | 2014-08-17T00:02:00.000 | 4 | 1 | 1 | 0 | python,setup.py | 25,345,187 | 1 | true | 0 | 0 | Using a setup.py script is only useful if:
Your code is a C extension, and then depends on platform-specific features that you really don't want to define manually.
Your code is pure Python but depends on other modules, in which case dependencies may be resolved automatically.
For a single file or a few set of files ... | 1 | 3 | 0 | Disclaimer: I'm still not sure I understand fully what setup.py does.
From what I understand, using a setup.py file is convenient for packages that need to be compiled or to notify Disutils that the package has been installed and can be used in another program. setup.py is thus great for libraries or modules.
But what ... | Should every python program be distributed with a setup.py? | 1.2 | 0 | 0 | 157 |
25,347,001 | 2014-08-17T07:01:00.000 | 1 | 0 | 1 | 0 | python,linux,windows,string | 25,347,015 | 1 | true | 0 | 0 | In Windows, newline is "\r\n", while on Linux it is "\n". This is why there is a character count discrepancy. | 1 | 0 | 0 | This is the first question I'm posting so please pardon my ignorance. I am using python to write into files and then read them. Using the usual suspects (file.read(), file.write())
The code is being run on both windows and Linux.
A particular string I'm reading, say str is giving a length of 6 on Windows, while it is g... | Python string has a character that is present in Linux but missing in Windows | 1.2 | 0 | 0 | 117 |
25,347,991 | 2014-08-17T09:35:00.000 | 6 | 0 | 1 | 0 | ipython,ipython-notebook | 25,347,992 | 2 | true | 0 | 0 | It turns out that I forgot to install dependencies to ipython notebook (I just did: pip install ipython). After you install ipython[notebook] or ipython[all] (or just install notebook depencies by hand) ipython profile create will also create notebook config files. | 1 | 5 | 0 | I have installed brand new ipython in a virtual enviorment, after that I tried to create configuration files via: ipython profile create, however ipython_notebook_config.py was not created, while ipython_config.py and ipython_nbconvert_config.py were created.
What can I do to create this file? | After calling ipython profile create ipython_notebook_config.py was not created | 1.2 | 0 | 0 | 2,048 |
25,348,557 | 2014-08-17T10:55:00.000 | 2 | 0 | 1 | 0 | python,virtualenv | 25,348,608 | 1 | true | 0 | 0 | Readable, but not writeable. :-)
A virtualenv is simply a place where a Python interpreter with a private library can be found. You can put your virtualenvs into a directory that the user can read (and change to), but has no write permissions. They will be able to use the python interpreter, but not change anything wit... | 1 | 0 | 0 | I am setting up a PC with different virtual environments for Python develoment. The environments are set up and should not be messed with. A user with no root access is expected to write and test some Python code on this PC.
How the file permissions should be set up so that this no-root-access user could switch between... | Minimum permissions to work with different virtualenvs in Python | 1.2 | 0 | 0 | 43 |
25,349,639 | 2014-08-17T13:32:00.000 | 0 | 0 | 0 | 0 | python,pygame | 25,518,175 | 1 | false | 0 | 1 | If you change your files to bmp, it should help. If you have really that little ram, then you should lower the resolution of your files using an image editor such as Preview or Paintbrush. Also, space might be saved through more efficient programming, such as putting objects in a list and just calling a list update. | 1 | 1 | 0 | I'm using PyGame on a Raspberry Pi, so I only have 512mb of RAM to work with. I have to load and display a lot of images in succession, though. I can't naively load all of these images into RAM as PyGame surfaces - I don't have enough RAM. The images themselves are fairly small, so I assume that PyGame surfaces are fai... | Loading many images in PyGame with limited RAM | 0 | 0 | 0 | 595 |
25,350,882 | 2014-08-17T15:52:00.000 | -1 | 0 | 0 | 1 | python,linux | 25,350,907 | 1 | false | 0 | 0 | history is not an executable file, but a built-in bash command. You can't run it with os.system. | 1 | 0 | 0 | I am trying to using os.system function to call command 'history'
but the stdout just show that 'sh :1 history: not found'
Other example i.e. os.system('ls') is works. Can anyone can tell me why 'history' does not work, and how to call 'history' command in Python script. | Call system command 'history' in Linux | -0.197375 | 0 | 0 | 227 |
25,351,113 | 2014-08-17T16:18:00.000 | 0 | 0 | 1 | 0 | python,python-2.7,pygame | 25,352,369 | 1 | true | 0 | 1 | Alex Reynolds idea to use tar archives seems to be a perfect match. | 1 | 0 | 0 | I'm currently tasked with the difficult problem of figuring out how to efficiently pack an image and some text within a single file. In doing so, I need to make the file relatively small (it shouldn't be much bigger than the size of the image file alone), and the process of accessing and saving the information should b... | How would I go about serializing multiple file objects into one file? | 1.2 | 0 | 0 | 49 |
25,351,968 | 2014-08-17T17:52:00.000 | 0 | 0 | 0 | 0 | python,html,pandas | 63,317,500 | 9 | false | 1 | 0 | For those who like to reduce typing (i.e., everyone!): pd.set_option('max_colwidth', None) does the same thing | 1 | 374 | 1 | I converted a Pandas dataframe to an HTML output using the DataFrame.to_html function. When I save this to a separate HTML file, the file shows truncated output.
For example, in my TEXT column,
df.head(1) will show
The film was an excellent effort...
instead of
The film was an excellent effort in deconstructing the com... | How can I display full (non-truncated) dataframe information in HTML when converting from Pandas dataframe to HTML? | 0 | 0 | 0 | 438,196 |
25,352,523 | 2014-08-17T18:50:00.000 | 1 | 0 | 1 | 0 | regex,python-2.7 | 25,352,554 | 1 | false | 0 | 0 | The $ denotes the end of the string. You want to match *x that's at the end of the string, so you need to write \*x$.
Also, since strings are iterables, l.extend('asd') will essentially do l.append('a'); l.append('s'); l.append('d'). You probably want to use append, not extend. | 1 | 0 | 0 | I wanted to see if I could strip the *x from these elements without using rstrip. I tried the following:
import re
import time
list = ["3*x", "2", "4*x", "1", "3*x", "0"]
new_list = []
for terms in list:
new_list.extend(re.sub(r'$(\*x)','', terms))
print new_list
time.sleep(4)
This logically makes sense, b... | Why does this simple regex error occur? | 0.197375 | 0 | 0 | 50 |
25,352,831 | 2014-08-17T19:24:00.000 | 1 | 0 | 1 | 1 | python-2.7,module,pip,python-requests | 25,352,852 | 1 | true | 0 | 0 | Since the "python -m pip install -U pip" actually displayed something, on a hunch I tried:
"python -m pip install requests"
This worked! I don't know why any of the installation guides do not say to do this. | 1 | 0 | 0 | I am new to Python (2.7) but I am trying to run a program that requires the "requests" module. I have installed pip using the get-pip.py script and registered the Python27 and Python27/Scripts paths as environment variables.
When I run "python -m pip install -U pip" it says the package is already up-to-date.
Following ... | Pip/Easy_install do not install desired package | 1.2 | 0 | 0 | 97 |
25,353,008 | 2014-08-17T19:47:00.000 | 4 | 0 | 1 | 1 | python,console,icons,pyinstaller | 46,946,166 | 2 | false | 0 | 0 | You must have group.icns file for app in Mac OS | 2 | 4 | 0 | This is a really short question. I have created a package for Mac using Pyinstaller and I am mainly trying to add an icon to it. I am also trying to get the program to run without launching the terminal as the user has no interaction with the terminal. Currently I am keeing the following into cmd when running pyinstall... | Pyinstaller add icon, launch without console for Mac | 0.379949 | 0 | 0 | 3,926 |
25,353,008 | 2014-08-17T19:47:00.000 | 1 | 0 | 1 | 1 | python,console,icons,pyinstaller | 33,063,961 | 2 | false | 0 | 0 | Try using --windowed instead. As far as I can tell they're the same thing, but it might do the trick.
As for icons, I've only gotten that to work on console windows. It just doesn't carry over to my main GUI window. | 2 | 4 | 0 | This is a really short question. I have created a package for Mac using Pyinstaller and I am mainly trying to add an icon to it. I am also trying to get the program to run without launching the terminal as the user has no interaction with the terminal. Currently I am keeing the following into cmd when running pyinstall... | Pyinstaller add icon, launch without console for Mac | 0.099668 | 0 | 0 | 3,926 |
25,355,287 | 2014-08-18T01:36:00.000 | 1 | 0 | 0 | 0 | python,selenium,selenium-webdriver | 25,355,323 | 2 | false | 1 | 0 | I'd use findelement(by.name(" submit.button2-click.x")).click() or use find element(by.cssSelector("selector ")).click() | 1 | 0 | 0 | I'm using the following code to click a button on a page but the XPath keeps changing so the code keeps breaking:
mydriver.find_element_by_xpath("html/body/div[2]/div[3]/div[1]/div/div[2]/div[2]/div[4]/div/form[2]/span/span/input").click()
Is there a better way I should be doing this? Here is the code for the button I ... | Python - Issues with selenium button click using XPath | 0.099668 | 0 | 1 | 531 |
25,359,288 | 2014-08-18T08:41:00.000 | 6 | 0 | 1 | 0 | python,opencv,video,frame,frame-rate | 35,372,469 | 5 | false | 0 | 0 | Another solution that doesn't depend on the sometimes buggy CV_CAP_PROP getters is to traverse your whole video file in a loop
Increase a frame counter variable every time a valid frame is encountered and stop when an invalid one comes (end of the video file).
Gathering information about the resolution is trickier bec... | 1 | 99 | 0 | How to know total number of Frame in a file ( .avi) through Python using open cv module.
If possible what all the information (resolution, fps,duration,etc) we can get of a video file through this. | How to know total number of Frame in a file with cv2 in python | 1 | 0 | 0 | 111,201 |
25,362,508 | 2014-08-18T11:42:00.000 | 0 | 0 | 0 | 0 | python,django,neo4j,neo4django | 25,363,972 | 1 | false | 1 | 0 | This sounds like a network setup problem. Can you check what URL the library is trying to connect to and that that one really goes to your local Neo4j Server? | 1 | 0 | 0 | I have neo4j-2.1.3 installed and server running on my Linux system . I created model "publisher" in my app . And then in manage.py shell , whenever I save a node with
from BooksGraph.models import Publisher
p=Publisher.objects.create(name='Sunny',address='b-1/196')
a long error pops up with:
Traceback (mo... | Neo4Django create node not working in manage.py shell | 0 | 0 | 0 | 113 |
25,365,036 | 2014-08-18T13:53:00.000 | 2 | 0 | 1 | 0 | python,oop | 25,365,197 | 4 | false | 0 | 0 | Each object has its own copy of data members whereas the the member functions are shared. The compiler creates one copy of the member functions separate from all objects of the class. All the objects of the class share this one copy.
The whole point of OOP is to combine data and functions together. Without OOP, the dat... | 2 | 2 | 0 | I usually use classes similarly to how one might use namedtuple (except of course that the attributes are mutable). Moreover, I try to put lengthy functions in classes that won't be instantiated as frequently, to help conserve memory.
From a memory point of view, is it inefficient to put functions in classes, if it is... | Python OOP: inefficient to put methods in classes? | 0.099668 | 0 | 0 | 167 |
25,365,036 | 2014-08-18T13:53:00.000 | 6 | 0 | 1 | 0 | python,oop | 25,365,082 | 4 | true | 0 | 0 | Methods don't add any weight to an instance of your class. The method itself only exists once and is parameterized in terms of the object on which it operates. That's why you have a self parameter. | 2 | 2 | 0 | I usually use classes similarly to how one might use namedtuple (except of course that the attributes are mutable). Moreover, I try to put lengthy functions in classes that won't be instantiated as frequently, to help conserve memory.
From a memory point of view, is it inefficient to put functions in classes, if it is... | Python OOP: inefficient to put methods in classes? | 1.2 | 0 | 0 | 167 |
25,367,508 | 2014-08-18T16:05:00.000 | 1 | 0 | 0 | 0 | python-2.7,stored-procedures,pyramid,pymssql | 25,646,833 | 1 | true | 1 | 0 | The solution was rather trivial. Within one object instance, I was calling two different stored procedures without closing the connection after the first call. That caused a pending request or so in the MSSQL-DB, locking it for further requests. | 1 | 0 | 0 | From a pyramid middleware application I'm calling a stored procedure with pymssql. The procedure responds nicely upon the first request I pass through the middleware from the frontend (angularJS). Upon subsequent requests however, I do not get any response at all, not even a timeout.
If I then restart the pyramid appl... | pyramid middleware call to mssql stored procedure - no response | 1.2 | 1 | 0 | 122 |
25,368,199 | 2014-08-18T16:48:00.000 | 1 | 0 | 0 | 0 | python,django,post,browser | 25,370,027 | 1 | true | 1 | 0 | Solution #1)
skip all this and see Rjzheng's link below -- it's much simpler.
Solution #2)
Since webbrowser.open() doesn't take POST args:
1) write a javascript page which accepts args via GET, then does an Ajax POST
2) have webbbrowser.open() open URL from step #1
Not glamorous, but it'll work :)
Be careful with secu... | 1 | 0 | 0 | I made a local GUI which requires the users to enter their usernames and passwords. Once they click submit, I want to have a pop out window which directs them to a website with their personal information through POST, which requires a request. I know that there is webbroswer.open() to open a website, but it doesn't tak... | How to use webbrowser.open() with request in python | 1.2 | 0 | 1 | 2,534 |
25,368,320 | 2014-08-18T16:56:00.000 | 1 | 0 | 1 | 0 | python,tkinter,py2exe | 25,370,162 | 2 | false | 0 | 1 | Well, I had installed both versions of Python 32 bit and 64 bit in my machine. When I was making it a stand alone probably some dlls were copied from the wrong library. So I completely uninstalled both versions and then installed 32 bit and it worked fine. | 1 | 0 | 0 | I have a python script that works fine on my computer (Python 2.7 32 bit installed). It has the following imports :
import mechanize
from bs4 import BeautifulSoup
from Tkinter import *
import json
import webbrowser
I wanted to distribute this to others so I found that we can create exe files usi... | exe generated from a python script with Py2exe does not work on xp | 0.099668 | 0 | 0 | 579 |
25,370,287 | 2014-08-18T19:02:00.000 | 4 | 0 | 1 | 0 | python,django,lifecycle | 25,370,876 | 1 | true | 1 | 0 | This is not a function of Django at all, but of whatever system is being used to serve Django. Usually that'll be wsgi via something like mod_wsgi or a standalone server like gunicorn, but it might be something completely different like FastCGI or even plain CGI.
The point is that all these different systems have their... | 1 | 3 | 0 | When using Django, how long does the Python process used to service requests stay alive? Obviously, a given Python process services an entire request, but is it guaranteed to survive across across requests?
The reason I ask is that I perform some expensive computations at when I import certain modules and would like t... | Django Process Lifetime | 1.2 | 0 | 0 | 266 |
25,373,895 | 2014-08-19T00:12:00.000 | 1 | 0 | 0 | 0 | python-2.7,opengl,pygame | 25,383,333 | 1 | true | 0 | 1 | I am no expert in Python but you could try:
Multiply the color of the image by a value like 0.1, 0.2, 0.3 (anything less that 1) which will give you a very dark texture. This would be the easiest method as it involves just reducing the color values of that texture.
Or you could try a more complex method such as drawing... | 1 | 0 | 0 | I'm trying to make an OpenGL in python/pygame but I don't know how to add shadow. I don't want to make a lot of darker images for my game. Can someone help me? | How can you edit the brightness of images in PyGame? | 1.2 | 0 | 0 | 933 |
25,374,338 | 2014-08-19T01:18:00.000 | 0 | 0 | 0 | 0 | javascript,python,ajax,highcharts,graphite | 25,381,895 | 1 | true | 0 | 0 | Maybe better is call one ajax which gets all data and then prepare parser which will return data for each chart. | 1 | 0 | 0 | In general I want to know the possible benefits of Graphite. For now I have a web app that receives data directly from JavaScript Ajax call and plots the data using high chart.
It first run 20 different queries for each graph using Python from my SQL database.
And sends each result data to HighChart library using G... | Graphite or multiple query with AJAX call? | 1.2 | 1 | 0 | 199 |
25,375,469 | 2014-08-19T03:57:00.000 | 0 | 0 | 0 | 0 | python,mysql,django,testing | 25,793,512 | 1 | false | 1 | 0 | The celery workers are still feeding off of the dev database even if the test server brings up other databases because they were told to in the settings file.
One fix would be to make a separate settings_test.py file that specifies the test database name and bring up celery workers from the setup command using subproce... | 1 | 1 | 0 | I have some code (a celery task) which makes a call via urllib to a Django view. The code for the task and the view are both part of the same Django project.
I'm testing the task, and need it to be able to contact the view and get data back from it during the test, so I'm using a LiveServerTestCase. In theory I set up ... | LiveServerTestCase server sees different database to tests | 0 | 0 | 0 | 190 |
25,375,903 | 2014-08-19T04:58:00.000 | 0 | 0 | 0 | 0 | python,django,windows-7-x64,aptana3 | 25,376,287 | 1 | false | 1 | 0 | After some searching, finally figured out that the default program to run the django-admin.py was aptana studio 3, even though the program had supposedly been uninstalled completely from my system. I changed the default program to be the python console launcher and now it works fine. There goes 2 hours down the drain.. | 1 | 0 | 0 | I am having an issue with starting a new project from the command prompt. After I have created a virtual env and activated the enviroment, when I enter in .\Scripts\django-admin.py startproject new_project, a popup window shows up which says "AptanaStudio3 executable launcher was unable to locate its companion shared l... | Aptana Studio 3 newproject error with Django | 0 | 0 | 0 | 116 |
25,380,448 | 2014-08-19T09:52:00.000 | 1 | 0 | 1 | 0 | python,excel,csv,export-to-csv | 25,380,579 | 2 | false | 0 | 0 | You shall inspect the real content of CSV file you have created and you will see, that there are ways to enclose text in quotes. This allows distinction between delimiter and a character inside text value.
Check csv module documentation, it explains these details too. | 1 | 1 | 0 | I am using python's CSV module to output a series of parsed text documents with meta data. I am using the csv.writer module without specifying a special delimiter, so I am assuming it is delimited using commas. There are many commas in the text as well as in the meta data, so I was expecting there to be way more column... | Python CSV module - how does it avoid delimiter issues? | 0.099668 | 1 | 0 | 518 |
25,382,412 | 2014-08-19T11:36:00.000 | 2 | 0 | 1 | 1 | python,python-3.x | 25,382,814 | 1 | false | 0 | 0 | The code works, the problem is probably your terminal settings. Go there and find the settings for "bell" and make sure it's set to "audible" or whatever your system calls it (as opposed to "visual" or "disabled" etc.).
To prove that it isn't Python's fault, try pressing backspace at the terminal prompt when nothing h... | 1 | 1 | 0 | I have tried print('\a') just to preduce a sound, but it didn't work. Why and How can I make it work? I'm on a linux system. | print('\a') doesn't work on linux (no sound) | 0.379949 | 0 | 0 | 788 |
25,383,624 | 2014-08-19T12:37:00.000 | 2 | 1 | 0 | 0 | python,c++,cross-platform,buffer,communication | 34,848,899 | 2 | false | 0 | 1 | I think we can use Named Pipes for communication between a python and C++ program if the processes are on the same machine.
However for different machines sockets are the best option. | 1 | 13 | 0 | I am looking for an efficient and smart way to send data between a C++-program and a Python-script. I have a C++ program which calculates some coordinates in-real-time 30Hz. And I wanna access these coordinates with a Python-script. My first idea was to simply create a .txt-file and write the coordinates to it, and the... | Communication between C++ and Python | 0.197375 | 0 | 0 | 20,489 |
25,383,954 | 2014-08-19T12:53:00.000 | 0 | 0 | 1 | 0 | python,mpi,mpi4py | 28,458,585 | 3 | false | 0 | 0 | I had a similar problem. For me, the easiest way to work around this was to have each process write out to its own file, and include a time stamp. This file can then be processed afterwards to put everything in order.
For example, include (python3-style) prints like:
print("Process %d just received point %r at %s" % (r... | 2 | 1 | 0 | I am using mpi4py to model a distributed application and I want all the processes to write to a common file. Is there any function which allows this without the race condition ? | file writing in mpi using python without race condition | 0 | 0 | 0 | 1,017 |
25,383,954 | 2014-08-19T12:53:00.000 | 0 | 0 | 1 | 0 | python,mpi,mpi4py | 25,389,738 | 3 | false | 0 | 0 | You should check out one of the many tutorials out there for using MPI I/O. I'm sure there's some way to use it in mpi4py. | 2 | 1 | 0 | I am using mpi4py to model a distributed application and I want all the processes to write to a common file. Is there any function which allows this without the race condition ? | file writing in mpi using python without race condition | 0 | 0 | 0 | 1,017 |
25,385,706 | 2014-08-19T14:13:00.000 | 0 | 0 | 0 | 0 | python,django,configuration,distributed,etcd | 26,611,821 | 2 | false | 1 | 0 | I haven't used CoreOS or Docker but read a lot and think it's very sexy stuff. I guess the solution depends on how you set up your app. If you have the same sort of "touch-reload" support you see in many appservers (uWSGI f.ex.), you can set key_file in /etc/etcd/etcd.conf and make your appserver watch that. This fe... | 1 | 6 | 0 | Let's say that I have a Django app, and I've offloaded environment variable storage to etcd. When I deploy a new server, the app can read from etcd, write the vars into (for example) a Python file that can be conditionally loaded on the app boot. This much is acceptable.
When the configuration changes, however, I have ... | Using etcd to manage Django settings | 0 | 0 | 0 | 1,116 |
25,386,119 | 2014-08-19T14:32:00.000 | 0 | 0 | 0 | 0 | python,django,many-to-many,foreign-key-relationship,one-to-one | 69,433,734 | 2 | false | 1 | 0 | In my point of View the diff b/w One-To-One & One-To-Many is
One-To-One : it means one person can contain one passport only
One-To-Many : it means one person can contain many address like(permanent address, Office address, Secondary Address)
if you call the parent model it will automatically call the many child class | 1 | 93 | 0 | I'm having a little difficulty getting my head around relationships in Django models.
Could someone explain what the difference is between a OneToOne, ManyToMany and ForeignKey? | Whats the difference between a OneToOne, ManyToMany, and a ForeignKey Field in Django? | 0 | 0 | 0 | 31,671 |
25,388,124 | 2014-08-19T16:07:00.000 | 0 | 0 | 0 | 1 | python,google-app-engine,google-bigquery | 25,393,093 | 1 | true | 1 | 0 | This is a known issue that has lingered for far far too long. It is fixed in this week's release, which should go live this afternoon or tomorrow. | 1 | 1 | 0 | We have a query which returns 0 records sometimes when called. When you call the getQueryResults on the jobId it returns with a valid pageToken with 0 rows. This is a bit unexpected since technically there is no data. Whats worst is if you keep supplying the pageToken for subsequent data-pulls it keeps giving zero rows... | BigQuery Api getQueryResults returning pageToken for 0 records | 1.2 | 1 | 0 | 471 |
25,388,571 | 2014-08-19T16:32:00.000 | 0 | 0 | 0 | 0 | python,gtk,gtk3,pygobject | 25,463,540 | 1 | false | 0 | 1 | Assuming the new parent is at the same level of the tree, you could use treestore.swap, otherwise you may have to just remove all the rows in the subtree and reinsert them at the new position | 1 | 0 | 0 | I have a treeiter created with the treeiter = self.devices_treestore.append(parent_treeiter, column_values_list) call.
How can I move it to another parent (with the whole subtree it holds)? | GTK+: Move tree element to another parent | 0 | 0 | 0 | 102 |
25,389,095 | 2014-08-19T17:02:00.000 | 1 | 1 | 1 | 0 | python | 61,017,490 | 22 | false | 0 | 0 | I used the ../ method to fetch the current project path.
Example:
Project1 -- D:\projects
src
ConfigurationFiles
Configuration.cfg
Path="../src/ConfigurationFiles/Configuration.cfg" | 1 | 221 | 0 | I've got a python project with a configuration file in the project root.
The configuration file needs to be accessed in a few different files throughout the project.
So it looks something like: <ROOT>/configuration.conf
<ROOT>/A/a.py, <ROOT>/A/B/b.py (when b,a.py access the configuration file).
What's the best / eas... | Python - Get path of root project structure | 0.009091 | 0 | 0 | 355,036 |
25,392,779 | 2014-08-19T20:53:00.000 | 0 | 0 | 1 | 0 | python,json,synchronization | 25,403,785 | 3 | false | 0 | 0 | If concurrency is not required, maybe consider writing 2 functions to read and write the data to a shelf file? Our is the idea to have the dictionary" aware" of changes to update the file without this kind of thing? | 2 | 5 | 0 | In perl there was this idea of the tie operator, where writing to or modifying a variable can run arbitrary code (such as updating some underlying Berkeley database file). I'm quite sure there is this concept of overloading in python too.
I'm interested to know what the most idiomatic way is to basically consider a lo... | In Python, how do I tie an on-disk JSON file to an in-process dictionary? | 0 | 0 | 0 | 500 |
25,392,779 | 2014-08-19T20:53:00.000 | 1 | 0 | 1 | 0 | python,json,synchronization | 25,406,625 | 3 | false | 0 | 0 | This is a developpement from aspect_mkn8rd' answer taking into account Gerrat's comments, but it is too long for a true comment.
You will need 2 special container classes emulating a list and a dictionnary. In both, you add a pointer to a top-level object and override the following methods :
__setitem__(self, key, va... | 2 | 5 | 0 | In perl there was this idea of the tie operator, where writing to or modifying a variable can run arbitrary code (such as updating some underlying Berkeley database file). I'm quite sure there is this concept of overloading in python too.
I'm interested to know what the most idiomatic way is to basically consider a lo... | In Python, how do I tie an on-disk JSON file to an in-process dictionary? | 0.066568 | 0 | 0 | 500 |
25,393,067 | 2014-08-19T21:13:00.000 | 1 | 0 | 1 | 0 | python,multithreading,resources | 25,393,196 | 1 | true | 0 | 0 | Python threads (as opposed to multiprocessing processes) use the same block of memory. If a thread adds something to a data structure that is directly or indirectly referenced from the master thread or other workers (for instance, a shared dictionary or list), that data won't be deleted when the thread dies. So basic... | 1 | 0 | 0 | I am writing super awesome software where i will create a new thread every new minute. This thread will store some data on a remote database server and end. When a new thread is created resources(memory...) are assigned to that thread. If i don't correctly free those resources at some time i will have a problem.
The th... | Python MultiThreading. Releasing resources | 1.2 | 0 | 0 | 362 |
25,393,753 | 2014-08-19T22:05:00.000 | 3 | 0 | 0 | 0 | python,django,django-south | 25,393,815 | 1 | false | 1 | 0 | It sounds like you want your program to add and delete fields from the model? That sounds like a bad idea. That would imply that your database schema will change dynamically under program control, which would be very unusual indeed. Think harder about what data you need to represent, and come up with a database sche... | 1 | 0 | 0 | I have need to dynamically (not manually edit models.py) alter/add/remove from a Django Model. Is this possible? Once the model is altered, will it persist? I then want to use South for running the database migration from the altered model. | Dynamically add to Django Model | 0.53705 | 0 | 0 | 106 |
25,395,229 | 2014-08-20T01:00:00.000 | 4 | 0 | 1 | 0 | python,python-2.7,code-organization,namedtuple | 25,395,776 | 1 | true | 0 | 0 | The thought process used for deciding where to place the namedtuples is no different than the one you would use for any other line of code:
Modules define logical units of functionality. Certain pieces of code may never need to know about or interact with another piece of code. The identification of these boundary lin... | 1 | 3 | 0 | I'm using quite a few namedtuples in my Python codebase and they're littered all over the .py files. Is it a good practice to extract all these declarations into a separate file or should they stay put where they're used?
In a few cases other modules need to use reference the namedtuples in separate modules since that'... | Should all namedtuples be in a separate file? | 1.2 | 0 | 0 | 948 |
25,395,814 | 2014-08-20T02:22:00.000 | 0 | 1 | 0 | 1 | python,terminal,raspberry-pi,tesseract,raspbian | 25,409,597 | 1 | false | 0 | 0 | There are ways to do what you asked, but I think you lack some research of your own, as some of these answers are very "googlable".
You can print commands to LX terminal with python using "sys.stdout.write()"
For the boot question:
1 - sudo raspi-config
2 - change the Enable Boot to Desktop to Console
3 - there is more... | 1 | 0 | 0 | okay, So for a school project I'm using raspberry pi to make a device that basically holds both the functions of an ocr and a tts. I heard that I need to use Google's tesseract through a terminal but I am not willing to rewrite the commands each time I want to use it. so i was wondering if i could either:
A: Use python... | can I use python to paste commands into LX terminal? | 0 | 0 | 0 | 428 |
25,396,421 | 2014-08-20T03:48:00.000 | 0 | 0 | 0 | 0 | python,http,python-requests | 25,396,973 | 1 | false | 0 | 0 | Spawn a thread (import threading). Run an HTTP server in there. You can generate a unique port on demand by socket.socket().bind(0). In the HTTP server, just write the incoming data to a file (perhaps named by timestamp and incoming port number). Then send your requests there. | 1 | 0 | 0 | I am looking for a recipe for writing and reading the raw data generated by a requests transaction from files rather than a socket. By "raw data" I mean the bytes just before they are written to or read from the underlying socket. I've tried:
Using "hooks". This seems to be mostly deprecated as the only remaining hook... | Perofrming a python-requests Request/Reponse transaction using files rather than a socket | 0 | 0 | 1 | 107 |
25,396,898 | 2014-08-20T04:50:00.000 | 0 | 1 | 0 | 0 | python-2.7,ftp | 25,397,066 | 2 | false | 0 | 0 | This is impossible
"The original FTP specification and recent extensions to it do not include any way to preserve the time and data for files uploaded to a FTP server." | 1 | 0 | 0 | How to change a modification time of file via ftp?
Any suggestions? Thanks! | How to set file modification time via ftp with python | 0 | 0 | 0 | 318 |
25,397,840 | 2014-08-20T06:12:00.000 | 2 | 0 | 0 | 0 | python,plot,widget,pyqt,pyqtgraph | 25,578,618 | 1 | false | 0 | 1 | For (1), you will have to break your data into two separate lines, and assign the colors individually. PyQtGraph does not yet support multiple colors per line.
For (2), consider using pg.InfiniteLine or pg.VTickGroup. | 1 | 2 | 0 | I'm making a time series monitoring program.
I'd like to change the color of a plot starting at half the range of the x-axis.
For a 100 x 20 plot widget I would like to change last 50 data points to another color.
How can I draw a custom vertical grid whenever every xx items of data are passed? | How can I obtain a pyqtgraph plotwidget with variable colors and grids depending on the data? | 0.379949 | 0 | 0 | 1,047 |
25,400,493 | 2014-08-20T08:50:00.000 | 0 | 1 | 1 | 0 | python,c++,multithreading,cpython,gil | 25,400,635 | 2 | false | 0 | 1 | Only if you spawn separate interpreters.
GIL is one-per-interpreter policy to protect interpreter internals. One interpreter will run one line at a time.
The only other way is to program at least one of your threads in pure C++ and offer a communication queue API to your python script or any way to communicate asynchro... | 1 | 1 | 0 | Can python embedded into c++ allow you to run n python scripts concurrently?
I am currently dealing with the dread which is the GIL. My project requires concurrency of at least 2 threads and the easy typing in Python would really help with code simplicity.
Would embedding my Python code in a C++ script which deals with... | Python GIL: concurrent C++ embed | 0 | 0 | 0 | 1,020 |
25,403,160 | 2014-08-20T11:07:00.000 | 1 | 0 | 0 | 1 | python,tornado | 25,410,159 | 1 | true | 0 | 0 | These methods are used internally; you shouldn't call them yourself. | 1 | 1 | 0 | I am learning the web framework Tornado. During the study of this framework, I found the class tornado.httpserver.HTTPserver. I know how to create a constructor of this class and create instance tornado.httpserver.HTTPserver in main() function. But this class tornado.httpserver.HTTPserver has 4 methods. I have not fo... | How to call methods of class tornado.httpserver.HTTPserver? | 1.2 | 0 | 0 | 120 |
25,407,197 | 2014-08-20T14:20:00.000 | 1 | 0 | 0 | 1 | python,google-app-engine,jinja2 | 25,407,418 | 1 | true | 1 | 0 | These are very artificial distinctions, and it's a mistake to assume that all apps have each of these layers, or that any particular function will fit only into one of them.
Jinja2 is a template language. It's firmly in the presentation layer.
There isn't really any such thing as the data access layer. If you really ne... | 1 | 0 | 0 | I'm new in Python/GAE and jinja2, and I want to present a schema of this architecture with displaying that in Layered, like this:
Presentation Layer: HTML+CSS+JQUERY
Business Layer: webapp2
DAO Layer: (I don't know what I put here when it's Python, I find some exemples for java thay put here "JDO orJDO or low level ... | In which design layer i can put jinja2 | 1.2 | 0 | 0 | 54 |
25,408,726 | 2014-08-20T15:28:00.000 | 1 | 0 | 0 | 0 | python,qt,qgraphicsview | 25,409,718 | 1 | true | 0 | 1 | You need to set QGraphicsItem::ItemIgnoresTransformations flag for text items. See the documentation:
This flag is useful for keeping text label items horizontal and unscaled, so they will still be readable if the view is transformed. | 1 | 1 | 0 | Is there a way of somehow putting a QGraphicsTextItem so that the text is always displayed undistorted and in the same size with respect to the user?
Imagine a scene that is zoomed in and out, but has points that are marked with a dot and some text. If the texts is part of the scene it is zoomed with the scene and will... | Qt display text in QGraphicsView undistorted, even in IgnoreAspectRatio views | 1.2 | 0 | 0 | 74 |
25,410,153 | 2014-08-20T16:43:00.000 | 3 | 0 | 1 | 0 | python-2.7,argparse | 25,410,267 | 1 | true | 0 | 0 | The documentation is talking about having flags (what it refers to as optional arguments) as being required (presumably positional arguments should be used instead). But if you insist on having them be required, that is the way to do it. | 1 | 2 | 0 | I have been using optparse module till python 2.6
But as 2.7 documentation says that optparse is deprecated, I am trying to explore argparse
Looks like I am stuck at a point wherein I need to write a script which accepts multiple 'mandatory' arguments where their position is not fixed. In addition it may have optional ... | Non-positional but required argument with argparse | 1.2 | 0 | 0 | 927 |
25,412,094 | 2014-08-20T18:39:00.000 | 1 | 0 | 0 | 0 | javascript,python,google-app-engine,google-plus,google-signin | 25,419,890 | 2 | true | 1 | 0 | You cannot perform reliable access control using only client-side javascript.
This is because since the javascript is executed on the user's browser, the user will be able to bypass any access control rule you've set there.
You must perform your access control on server-side, in your case in Python code.
Generally, peo... | 1 | 0 | 0 | I decided to use social media benefits on my page and currently I'm implementing Google+ Sign-In.
One of the pages on my website should be accessible for logged in users only (adding stuff to the page). I am logging user to website via JavaScript.
I'm aware that javascript is executed on client-side but I am curious i... | Google+ Sign-In - Page accessible for logged in users only | 1.2 | 0 | 1 | 73 |
25,412,906 | 2014-08-20T19:27:00.000 | 0 | 0 | 1 | 0 | python,macos,ipython,packages | 25,412,973 | 1 | true | 0 | 0 | Use the pip/easy_install binary located in /sw/bin to install packages. If you want this to be the default when the command is called, just put /sw/bin before /usr/bin in your .profile. | 1 | 0 | 0 | I have Mac OS X 10.7. I have a "default" ipython, but also a different ipython installed at a different location /sw/bin/ipython. When I install packages with pip install, though, I can't access them with the ipython at /sw/bin/ipython. How would I install packages for this other ipython? | How can python packages be installed for ipython located in a special location on a Mac? | 1.2 | 0 | 0 | 32 |
25,413,343 | 2014-08-20T19:55:00.000 | 0 | 0 | 0 | 0 | python,mysql,solr,django-haystack | 25,414,143 | 1 | true | 1 | 0 | I'd go with a modified version of the first one - it'll keep user specific data that's not going to be used for search out of the index (although if you foresee a case where you want to search for favourite'd articles, it would probably be an interesting field to have in the index) for now. For just display purposes li... | 1 | 0 | 0 | Let's assume I am developing a service that provides a user with articles. Users can favourite articles and I am using Solr to store these articles for search purposes.
However, when the user adds an article to their favourites list, I would like to be able to figure out out which articles the user has added to favouri... | Solr & User data | 1.2 | 1 | 0 | 102 |
25,414,394 | 2014-08-20T21:04:00.000 | 1 | 0 | 0 | 1 | python,django,eventlet,green-threads | 25,425,696 | 1 | true | 1 | 0 | There is no such context manager, though you are welcome to contribute one.
You have monkey patched everything, but you do not want to monkey patch socket in memcache client. Your options:
monkey patch everything but socket, then patcher.import_patched particular modules. This is going to be very hard with Django/Tast... | 1 | 1 | 0 | I have a Django/Tastypie app where I've monkey patched everything with eventlet.
I analysed performance during load tests while using both sync and eventlet worker clasees for gunicorn. I tested against sync workers to eliminate the effects of waiting for other greenthreads to switch back, and I found that the memcache... | Prevent greenthread switch in eventlet | 1.2 | 0 | 0 | 349 |
25,415,104 | 2014-08-20T21:57:00.000 | 24 | 0 | 1 | 1 | python,linux,multiprocessing | 25,415,676 | 4 | true | 0 | 0 | SIGQUIT (Ctrl + \) will kill all processes even under Python 2.x.
You can also update to Python 3.x, where this behavior (only child gets the signal) seems to have been fixed. | 2 | 22 | 0 | I am running a Python program which uses the multiprocessing module to spawn some worker threads. Using Pool.map these digest a list of files.
At some point, I would like to stop everything and have the script die.
Normally Ctrl+C from the command line accomplishes this. But, in this instance, I think that just interru... | Kill Python Multiprocessing Pool | 1.2 | 0 | 0 | 10,314 |
25,415,104 | 2014-08-20T21:57:00.000 | 0 | 0 | 1 | 1 | python,linux,multiprocessing | 25,415,725 | 4 | false | 0 | 0 | I found that using the python signal library works pretty well in this case. When you initialize the pool, you can pass a signal handler to each thread to set a default behavior when the main thread gets a keyboard interrupt.
If you really just want everything to die, catch the keyboard interrupt exception in the main ... | 2 | 22 | 0 | I am running a Python program which uses the multiprocessing module to spawn some worker threads. Using Pool.map these digest a list of files.
At some point, I would like to stop everything and have the script die.
Normally Ctrl+C from the command line accomplishes this. But, in this instance, I think that just interru... | Kill Python Multiprocessing Pool | 0 | 0 | 0 | 10,314 |
25,416,553 | 2014-08-21T00:32:00.000 | 0 | 0 | 1 | 0 | python,oop,rotation | 25,417,646 | 1 | false | 0 | 0 | Geometric objects that have a fixed boundary/end-points can be translated and rotated in place. But for a line, unless you talk about a line from point A to point B with a fixed length, you are looking at both end-points either being at infinity or -infinity (y = mx + c). Division using infinity or -infinity is not sim... | 1 | 1 | 0 | I run into an OOP problem when coding something in python that I don't know how to address in an elegant solution. I have a class that represents the equation of a line (y = mx + b) based on the m and b parameters, called Line. Vertical lines have infinite slope, and have equation x = c, so there is another class Verti... | Elegant Solution to an OOP Issue involving type-changing in python | 0 | 0 | 0 | 45 |
25,419,510 | 2014-08-21T06:23:00.000 | 0 | 0 | 0 | 1 | android,python,ssh,kivy | 41,788,451 | 3 | false | 0 | 1 | Don't know you found the answer or not. But what i have understood is that you are trying to connect android device from Ubuntu. If I am right then (go on reading) you are following wrong steps.
First :- Your Ubuntu does not have ssh server by default so you get this error message.
Second :- You are using 127.0.0.1 add... | 3 | 1 | 0 | This seems to be a dumb question, but how do I ssh into the kivy-remote-shell?
I'm trying to use buildozer and seem to be able to get the application built and deployed with the command, buildozer -v android debug deploy run, which ends with the application being pushed, and displayed on my android phone, connected via... | How to connect to kivy-remote-shell? | 0 | 0 | 0 | 1,540 |
25,419,510 | 2014-08-21T06:23:00.000 | 1 | 0 | 0 | 1 | android,python,ssh,kivy | 25,423,631 | 3 | false | 0 | 1 | 127.0.0.1
This indicates something has gone wrong - 127.0.0.1 is a standard loopback address that simply refers to localhost, i.e. it's trying to ssh into your current computer.
If this is the ip address suggested by kivy-remote-shell then there must be some other problem, though I don't know what - does it work on an... | 3 | 1 | 0 | This seems to be a dumb question, but how do I ssh into the kivy-remote-shell?
I'm trying to use buildozer and seem to be able to get the application built and deployed with the command, buildozer -v android debug deploy run, which ends with the application being pushed, and displayed on my android phone, connected via... | How to connect to kivy-remote-shell? | 0.066568 | 0 | 0 | 1,540 |
25,419,510 | 2014-08-21T06:23:00.000 | 2 | 0 | 0 | 1 | android,python,ssh,kivy | 25,426,085 | 3 | false | 0 | 1 | When the app is running, the GUI will tell you what IP address and port to connect to. | 3 | 1 | 0 | This seems to be a dumb question, but how do I ssh into the kivy-remote-shell?
I'm trying to use buildozer and seem to be able to get the application built and deployed with the command, buildozer -v android debug deploy run, which ends with the application being pushed, and displayed on my android phone, connected via... | How to connect to kivy-remote-shell? | 0.132549 | 0 | 0 | 1,540 |
25,422,847 | 2014-08-21T09:29:00.000 | -1 | 1 | 0 | 0 | python,robotframework | 25,830,228 | 5 | false | 1 | 0 | Actually, you can SET TAG to run whatever keyword you like (for sanity testing, regression testing...)
Just go to your test script configuration and set tags
And whenever you want to run, just go to Run tab and select check-box Only run tests with these tags / Skip tests with these tags
And click Start button :) Robot ... | 1 | 1 | 0 | In Robot Framework, the execution status for each test case can be either PASS or FAIL. But I have a specific requirement to mark few tests as NOT EXECUTED when it fails due to dependencies.
I'm not sure on how to achieve this. I need expert's advise for me to move ahead. | Customized Execution status in Robot Framework | -0.039979 | 0 | 0 | 3,561 |
25,424,056 | 2014-08-21T10:30:00.000 | 0 | 1 | 0 | 0 | python,serial-port,pyserial | 26,436,860 | 3 | true | 0 | 0 | It turns out. To drain serial output physically, we have serial.drainOutput() function. It works but if you're looking for a real time operation it might not help as python is not a very good language if you're expecting a real time performance.
Hope it helps. | 1 | 2 | 0 | I'm using PySerial library for a project and it works fine. Though, now that my requirements have changed and i need to implement a non blocking serial write option. I went through PySerial official documentation as well as several examples however, couldn't find a suitable option. Now my question is : is non-blocking ... | PySerial non blocking write? | 1.2 | 0 | 0 | 5,879 |
25,429,410 | 2014-08-21T14:47:00.000 | 0 | 1 | 0 | 0 | python,python-3.x,raspberry-pi,compatibility,python-2.x | 25,429,625 | 2 | false | 0 | 0 | Search for backports or try to split it up into different processes. | 2 | 3 | 0 | I'm currently building an application in my Raspberry Pi. This application have to use I2C bus along serial port. Previously I developed both applications independent between them; for I2C app, I used a python3 module for handling the bus. But for handling serial port I use a python 2 module.
Now I want to build an app... | Is it possible to have an application using python 2 and python 3 modules? | 0 | 0 | 0 | 71 |
25,429,410 | 2014-08-21T14:47:00.000 | 0 | 1 | 0 | 0 | python,python-3.x,raspberry-pi,compatibility,python-2.x | 25,550,994 | 2 | true | 0 | 0 | Finally, I used 2to3 to convert python 2 modules. But due to the module interacts with serial port (pyserial), byte handling were not full correctly converted, so I have to edit the code after conversion using encode/decode functions. | 2 | 3 | 0 | I'm currently building an application in my Raspberry Pi. This application have to use I2C bus along serial port. Previously I developed both applications independent between them; for I2C app, I used a python3 module for handling the bus. But for handling serial port I use a python 2 module.
Now I want to build an app... | Is it possible to have an application using python 2 and python 3 modules? | 1.2 | 0 | 0 | 71 |
25,431,187 | 2014-08-21T16:19:00.000 | 0 | 0 | 1 | 0 | python,crash,osx-snow-leopard,python-idle | 25,505,313 | 2 | true | 0 | 0 | SOLUTION:
Solved by installing Python version 3.1.0, in which the Python runtime and the IDLE editor both seem to work with no problems (so far).
I would add that:
I am only writing really simple scripts based on a tutorial and
The editor only works when started by clicking on File > New Window | 1 | 0 | 0 | I am new to Python and I have installed the 64-bit version 3.4.1 using the .dmg installer from the Python website, and when I start IDLE and try to create a new file, IDLE crashes and quits. Same thing happens when I try to load a Python file using the "File > Open" option.
I am running Mac OSX 10.6.8 Snow Leopard on a... | Python 3.4 IDLE not working properly in MacOSX 10.6.8 Snow Leopard, crashes when the editor is started | 1.2 | 0 | 0 | 664 |
25,433,128 | 2014-08-21T18:07:00.000 | 0 | 0 | 0 | 0 | python,web2py | 25,433,301 | 2 | false | 1 | 0 | An easy way is to change the last element in the path name to something that isn't a valid Python identifier. Web2py internally represents views, models, apps and other constructs using python objects, and if you give something a name that isn't a valid identifier, web2py will pas over it.
For example, change beautify... | 1 | 0 | 0 | I've set up an instance of Web2Py on a hosted server and in the administrative interface, I've disabled the example app but it's still accessible. For example, (see what I did there?) if I type the address myserver.com/examples/template_examples/beautify then Web2Py happily dumps all sorts of nasty bits about my server... | Can't disable example app on Web2Py | 0 | 0 | 0 | 196 |
25,439,007 | 2014-08-22T03:16:00.000 | 1 | 0 | 0 | 0 | python,excel,openpyxl | 25,486,431 | 1 | false | 0 | 1 | The simple answer is that a cell is the smallest item to which you can apply styles to. You can work around this restriction by embedding formatting within the text but this is even messier than it sounds. | 1 | 3 | 0 | I am trying to port my code from pywin32 to openpyxl. But I can't find the way to change the color style on partial characters in the cell. In pywin32, I can use:
Range(Cell).GetCharacters(Start, Length).Font.ColorIndex to do this. But it seems there is no such method like that in openpyxl? | openpyxl - style on characters | 0.197375 | 0 | 0 | 1,007 |
25,440,006 | 2014-08-22T05:17:00.000 | 0 | 0 | 1 | 0 | python,matplotlib | 25,440,301 | 3 | false | 0 | 0 | You want to get the regular (zoomable) plot window, right? I think you can not do it in the same kernel as, unfortunately, you can't switch from inline to qt and such because the backend has already been chosen: your calls to matplotlib.use() are always before pylab. | 2 | 3 | 0 | I am running ipython remotely on a remote server. I access it using serveraddress:8888/ etc to write code for my notebooks.
When I use matplotlib of course the plots are inline. Is there any way to remotely send data so that plot window opens up? I want the whole interactive environment on matplotlib on my local machin... | how to display matplotlib plots on local machine? | 0 | 0 | 0 | 2,520 |
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