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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14,201,551 | 2013-01-07T18:08:00.000 | 3 | 0 | 0 | 1 | python,linux,alsa,udev,soundcard | 14,203,491 | 2 | false | 0 | 0 | The sound card limit is defined as the symbol SNDRV_CARDS in include/sound/core.h.
When I increased this seven years ago, I did not go beyond 32 because the card index is used as a bit index for the variable snd_cards_lock in sound/core/init.c, and I did not want to change more than necessary.
If you make snd_cards_loc... | 1 | 6 | 0 | I'm working on an educative multiseat project where we need to connect 36 keyboards and 36 USB sound cards to a single computer. We're running Ubuntu Linux 12.04 with the 3.6.3-030603-generic kernel.
So far we've managed to get the input from the 36 keyboards, and recognized the 36 sound cards without getting a kernel ... | Need more than 32 USB sound cards on my system | 0.291313 | 0 | 0 | 1,112 |
14,202,844 | 2013-01-07T19:38:00.000 | 2 | 0 | 0 | 0 | python,flask | 14,202,887 | 2 | false | 1 | 0 | I'm fairly certain that there is no guarantee of that. However, it depends on how you're running the application. If you're using Heroku+gunicorn for example, all files on Heroku that are changed during a request are not kept, i.e., the files are ephemeral. So if you were to change the text file, the changes would not ... | 1 | 3 | 0 | I ask because I'm wondering if I can get away with using a text file as a data store for a simple app. If each handler runs to completion, then it seems like I should be able to modify the text file during that request without worrying about conflicts, assuming I close the file at the end of each request.
Is this feasi... | Does a Flask Request Run to Completion before another Request Starts? | 0.197375 | 0 | 0 | 1,304 |
14,202,982 | 2013-01-07T19:49:00.000 | 1 | 0 | 1 | 0 | python,command-line | 14,205,874 | 4 | false | 0 | 0 | Honestly when I'm wanting to do this quickly I don't mess with the code, I just use tee. Its a *nix utility that does just what you are talking about splitting the pipe for display and piping. You could farther restrict what you are displaying with a grep. Great for debugging something that uses pipes. If this is pa... | 1 | 2 | 0 | I'm doing some python programming, and I would like to "pipe" the output of one program to another. That's easily doable using sys.stdin and sys.stdout. However, I would also like to be able to print info and warning messages to the terminal. Is there any (simple) way to have multiple channels, with messages printed to... | Piping output in Python: multiple channels for data and messages? | 0.049958 | 0 | 0 | 1,273 |
14,205,113 | 2013-01-07T22:21:00.000 | 5 | 0 | 0 | 0 | python,directx,screenshot | 14,205,237 | 1 | false | 0 | 1 | This is a rather complicated topic.
Actually taking a screenshot, in the most simplistic way, involves grabbing the backbuffer and writing that to a file. Your Python DirectX bindings should provide support for making a texture and filling it with data, from the back or front buffer; after that the image writing is up ... | 1 | 2 | 0 | I'm looking at a way to take screenshot of DirectX games in Python. I already tried to use PIL and other stuff but I only end up with black screenshots. I saw that the project directpython11 provided a Python binding to some DirectX stuff but I didn't find anything related to screenshot of external DirectX applications... | Take a screenshot of a DirectX game in Python | 0.761594 | 0 | 0 | 2,931 |
14,205,744 | 2013-01-07T23:12:00.000 | 0 | 1 | 0 | 0 | python-2.7,sign,pyusb | 14,761,682 | 1 | false | 0 | 0 | I had a similar problem on a Mac (mtn lion): When I ran the sample app, I got a segment fault 11. It was crashing in the alphasign library from the sign.connect() call.
Changed it to sign.connect(reset=False), and it worked fine.
FYI: The segment fault occurs in the low-level USB driver, libusb, not in python code. | 1 | 0 | 0 | I am trying to program an alpha sign - 215r - using the alphasign python api [Alphasign] (https://alphasign.readthedocs.org/en/latest/index.html). I downloaded python 2.7, pyusb, pyserial, and libusb. I got the vid and pid of the sign using libusb and added that to the devices.py file. However, when I ran the example p... | Programming an Alpha electronic sign with Alphasign Python | 0 | 0 | 0 | 262 |
14,206,982 | 2013-01-08T01:35:00.000 | 1 | 0 | 0 | 0 | windows,authentication,wxpython,modal-dialog | 14,217,396 | 1 | true | 0 | 1 | There is no full proof way to do this on Windows. You can show a wx.Frame modally using its MakeModal() method. And you can catch EVT_CLOSE and basically veto it it they try to close the frame. However, if they have access to the Task Manager or even Run, they can probably get around the screen. Most users won't be tha... | 1 | 0 | 0 | I manage a number of Windows PCs which are used to control equipment. Each computer has a specific program installed which is what people launch to use that equipment. We want to require people to log in before they can access this program.
Currently, I have a wxpython app which just launches that executable when peopl... | Logon-type wxpython app | 1.2 | 0 | 0 | 95 |
14,209,258 | 2013-01-08T06:17:00.000 | 0 | 0 | 0 | 0 | python,css,django,web | 14,210,824 | 2 | false | 1 | 0 | Usually the easiest way to do this is adding a folder static in the root of the project. Then look for and make settings attributes
STATICFILES_DIRS = ('static',) if you want you can make this absolute path(recommended by django)
STATIC_URL = '/static/'
Since you're using the dev-server this should be able to work. N... | 2 | 0 | 0 | My CSS will not work when I run my site. Only the HTML displays. I have the right link. I'm confused as to what put in the MEDIA_ROOT, MEDIA_URL, STATIC_ROOT, and STATIC_URL. Every site tell me something different. I'm not using the (file) directory. I the above mentioned setting refer to where the files are placed and... | CSS won't work with Django powered site | 0 | 0 | 0 | 126 |
14,209,258 | 2013-01-08T06:17:00.000 | 0 | 0 | 0 | 0 | python,css,django,web | 14,209,324 | 2 | false | 1 | 0 | Give the link of your CSS in STATIC_ROOT.
In html Do: {{ STATIC_URL }}/css in link. | 2 | 0 | 0 | My CSS will not work when I run my site. Only the HTML displays. I have the right link. I'm confused as to what put in the MEDIA_ROOT, MEDIA_URL, STATIC_ROOT, and STATIC_URL. Every site tell me something different. I'm not using the (file) directory. I the above mentioned setting refer to where the files are placed and... | CSS won't work with Django powered site | 0 | 0 | 0 | 126 |
14,210,568 | 2013-01-08T07:59:00.000 | 0 | 0 | 0 | 1 | python,multithreading,parallel-processing,serial-port | 26,588,050 | 1 | false | 0 | 0 | Instead of using threads you could also implementing your data sources as generators and just loop over them to consume the incoming data and do something with it. Perhaps using two different generators and zipping them together, actually would be a nice experiment I'm not entirely sure it can be done... | 1 | 1 | 0 | I am collecting data from two pieces of equipment using serial ports (scale and conductivity probe). I need to continuously collect data from the scale which I average between collection points of the conductivity probe (roughly a minuet).
Thus I need to run two processes at the same time. One that collects data from ... | Running process in parallel for data collection | 0 | 0 | 0 | 186 |
14,214,331 | 2013-01-08T11:51:00.000 | 0 | 1 | 0 | 0 | maven,python-3.x,intellij-idea | 14,501,896 | 1 | false | 0 | 0 | Your file types are not configured correctly, .py is most likely assigned to Text files instead of Python files, you can fix it in File | Settings | File Types.
There is no support for tests running via Maven, but you can create your own Run/Debug configuration for Python unit tests in IDEA. | 1 | 1 | 0 | I am using intellij IDEA version 11.1.5 on windows and python plugin version is 2.9.2
I am using grinder maven plugin to run the performance tests using grinder. It only supports python(Jython) to run tests. I am not getting any auto suggestions for the python development even though I have installed the python plugin... | Python support for maven module in intellij | 0 | 0 | 0 | 711 |
14,217,858 | 2013-01-08T15:03:00.000 | 3 | 0 | 0 | 1 | python,google-app-engine,opencv,python-2.7 | 43,981,159 | 3 | false | 1 | 0 | Now it is possible. The app should be deployed using a custom runtime in the GAE flexible environment. OpenCV library can be installed by adding the instruction RUN apt-get update && apt-get install -y python-opencv in the Dockerfile. | 1 | 4 | 0 | HI actually I was working on a project which i intended to deploy on the google appengine.
However I found that google app engine is supported by python. Can I run openCV with python scripts on Google app engine? | Can I use open cv with python on Google app engine? | 0.197375 | 0 | 0 | 2,599 |
14,218,896 | 2013-01-08T15:53:00.000 | 1 | 0 | 1 | 0 | python,cygwin | 14,219,758 | 2 | false | 0 | 0 | I think I have figured out what the problem is. In the package selection window, there are three options above the package list, namely, keep, Curr and Exp. The default one is Curr, which means that cygwin will select the most stable version for each selected package. In some way, python 2.6.8-2 is considered more st... | 1 | 2 | 0 | So I have installed python 2.7 in cygwin and it runs without any problem. However, when I install new packages using cygwin's setup.exe, it will always select new version 2.6.8 for the python package by default, and if I don't switch back to 2.7.2, it will uninstall python 2.7 and install python 2.6. What's wrong with ... | Cygwin always revert Python 2.7 to Python 2.6 when update | 0.099668 | 0 | 0 | 942 |
14,222,670 | 2013-01-08T19:34:00.000 | 2 | 0 | 0 | 0 | listbox,python-2.7,tkinter | 14,251,259 | 1 | true | 0 | 1 | Assuming from silence that there's nothing I missed. I went with option 2 -- the acrobatics weren't quite as complex as I'd thought. I just created a behind-the-scenes list wrapped up in a class; every time I update the list, the class syncs up the content of the listbox by doing a ' '.join on the list then setting t... | 1 | 3 | 0 | This is one of those just-making-sure-I-didn't-miss-anything posts.
I have a TKinter GUI in Python 2.7.3 that includes a listbox, and there are circumstances where I'd like to directly modify the text of a specific item at a known index. I've scoured the documents and there's no lb.itemset() method or anything like it... | Directly modify a specific item in a TKinter listbox? | 1.2 | 0 | 0 | 1,274 |
14,225,865 | 2013-01-08T23:30:00.000 | 1 | 0 | 0 | 1 | python,celery | 14,246,789 | 1 | false | 1 | 0 | This is a bug in celery 3.0.12, reverting to celery 3.0.11 did the job.
Hope this helps someone | 1 | 0 | 0 | When I run my task: my_task.apply_async([283], countdown=5) It runs immediately when it should be running 5 seconds later as the ETA says
[2013-01-08 15:15:21,600: INFO/MainProcess] Got task from broker: web.my_task[4635f997-6232-4722-9a99-d1b42ccd5ab6] eta:[2013-01-08 15:20:51.580994]
[2013-01-08 15:15:22,095: INFO/Ma... | Celery 3.0.12 countdown not working | 0.197375 | 0 | 0 | 497 |
14,228,044 | 2013-01-09T03:55:00.000 | 1 | 0 | 1 | 0 | python,visual-studio-2008 | 14,249,523 | 2 | false | 0 | 0 | Thank you for your help Luis, from there I found a solution to the link.exe 1120 error:
1 - get Windows SDK from Luis post above
2 - go to the folder for Visual Studio 9 bin (mine was: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin)
3 - open the Visual Studio 2008 Command Prompt
4 - change directory to mrjdb... | 1 | 1 | 0 | I'm trying to build mrjbq7's wrapper for TA-Lib for Python. After several attempts, I'm fairly sure the wrapper won't build because I have Visual Studio 2010, but my Python is looking for the compiler from Visual Studio 2008. Is it possible to get only the compiler? I have a feeling I may need to install Visual Studio ... | how to compile with Visual Studio 2008 when Visual Studio 2010 is installed? | 0.099668 | 0 | 0 | 6,062 |
14,229,547 | 2013-01-09T06:33:00.000 | 0 | 0 | 1 | 0 | python | 14,230,307 | 4 | true | 0 | 0 | In Python, all numbers that are not 0 are evaluated as True. Only 0 is evaluated as False. In this code, 1 and 2 and 3 really evaluates as True and True and True. Therefore, it must return True. Now we know that 3 is the same as True - that's why the interpreter is correct in returning 3. So why does it return 3 wh... | 2 | 0 | 0 | I was looking through some lab material from a computer course offered at Berkeley U C and came across some examples on the form of questions on a test about python.
1 and 2 and 3
answer 3
I've goggled it till i was red in the fingers, but to no avail.. Could someone be kind enuff to direct me to some docs that expla... | How does "and" and "or" work comparing numbers in python? | 1.2 | 0 | 0 | 75 |
14,229,547 | 2013-01-09T06:33:00.000 | 0 | 0 | 1 | 0 | python | 14,229,601 | 4 | false | 0 | 0 | x and y returns true if both x and y are true; while
x or y returns if either one is true. similarly multiple and returns true if all are true. | 2 | 0 | 0 | I was looking through some lab material from a computer course offered at Berkeley U C and came across some examples on the form of questions on a test about python.
1 and 2 and 3
answer 3
I've goggled it till i was red in the fingers, but to no avail.. Could someone be kind enuff to direct me to some docs that expla... | How does "and" and "or" work comparing numbers in python? | 0 | 0 | 0 | 75 |
14,232,451 | 2013-01-09T09:53:00.000 | 2 | 0 | 0 | 0 | python,image-processing,3d,2d | 14,233,016 | 1 | false | 0 | 1 | There are several things you can mean, I think none of which currently exists in free software (but I may be wrong about that), and they differ in how hard they are to implement:
First of all, "a 3D volume" is not a clear definition of what you want. There is not one way to store this information. A usual way (for comp... | 1 | 0 | 1 | I am looking for a library, example or similar that allows me to loads a set of 2D projections of an object and then converts it into a 3D volume.
For example, I could have 6 pictures of a small toy and the program should allow me to view it as a 3D volume and eventually save it.
The object I need to convert is very si... | 2D image projections to 3D Volume | 0.379949 | 0 | 0 | 1,288 |
14,233,867 | 2013-01-09T11:07:00.000 | 3 | 0 | 1 | 0 | python,pylint | 14,235,996 | 3 | true | 0 | 0 | What you are asking for is not supported in the current version of Pylint.
You may want to get in touch with the maintainers and propose them a feature request and an implementation. | 1 | 7 | 0 | I have a problem with pylint, i.e. sometimes it repeats the same message for some variable/class/module etc. and I can't find a workaround for that. What I want is to say pylint
"don't check [message XXX|any message] for variable YYY in [this module|module "ZZZ"]" with some option or rcfile directive. | Pylint ignore specific names | 1.2 | 0 | 0 | 9,544 |
14,236,130 | 2013-01-09T13:20:00.000 | 0 | 1 | 0 | 1 | python | 14,236,492 | 2 | false | 0 | 0 | If you're happy to stay specific to unix and then you can get the parent PID of the process with os.getppid(). If you wanted to translate it back to a program id, you could can run a subprocess to use the relevant OS-specific PID-to-useful-data tool (odds on - ps) | 1 | 0 | 0 | Is there a way to know which application I'm running a python script from?
I can run python from multiple sources, like Textmate, Sublime Text 2 or Terminal (I'm on Mac OSX). How can I know, exactly which tool launched the current python app.
I've tried looking into the os and inspect modules, but couldn't find the sol... | How to know which application run a python script | 0 | 0 | 0 | 99 |
14,236,371 | 2013-01-09T13:31:00.000 | 2 | 0 | 0 | 0 | python,montecarlo | 14,236,501 | 2 | false | 0 | 0 | When the search space becomes larger, it can become infeasible to do an exhaustive search. So we turn to Monte Carlo methods out of necessity. | 1 | 1 | 1 | I have a relatively simple function with three unknown input parameters for which I only know the upper and lower bounds. I also know what the output Y should be for all of my data.
So far I have done a simple grid search in python, looping through all of the possible parameter combinations and returning those results... | Advantage of metropolis hastings or MonteCarlo methods over a simple grid search? | 0.197375 | 0 | 0 | 983 |
14,236,644 | 2013-01-09T13:47:00.000 | 0 | 0 | 1 | 0 | python,installation,virtualenv,macports | 14,242,163 | 1 | true | 0 | 0 | macports only installs python modules in the site-packages directory directly corresponding to the python interpreter. It does this to allow multiple different interpreters to be installed.
Macports is also installed under the root user and not your own account. It can't therefore know about virtualenv setups which are... | 1 | 0 | 0 | I can't seem to find the exact situation I have, please point me to a duplicate if there is one.
I am using virtualenv and python and trying to install a module but no matter which version of python 'which python' comes up with MacPorts seems to install the modules in the default macports python location (/opt/local/sh... | MacPorts doesn't install Python module in right place for virtualenv | 1.2 | 0 | 0 | 414 |
14,236,918 | 2013-01-09T14:00:00.000 | 0 | 0 | 0 | 0 | python,gtk | 14,327,100 | 2 | false | 0 | 1 | You likely have widgets on your pages that are stopping them from shrinking. You may need to put the content of your pages in a ViewPort or ScrolledWindow to get the effect you are looking. | 1 | 0 | 0 | I have a notebook window. I want to change dynamically size. I did expand dynamically, but I couldn't shrink it. I used win.set_size_request(w,h) for expand. How can I shrink dynamically? | Gtk Notebook size dynamically change | 0 | 0 | 0 | 329 |
14,241,239 | 2013-01-09T16:01:00.000 | 1 | 0 | 0 | 0 | python,html,selenium-webdriver,highlighting | 14,241,317 | 2 | false | 0 | 0 | [NOTE: I'm leaving this answer for historical purposes but readers should note that the original question has changed from concerning itself with Python to concerning itself with Selenium]
Assuming you're talking about a browser based application being served from a Python back-end server (and it's just a guess since t... | 2 | 1 | 0 | Can I have any highlight kind of things using Python 2.7? Say when my script clicking on the submit button,feeding data into the text field or selecting values from the drop-down field, just to highlight on that element to make sure to the script runner that his/her script doing what he/she wants.
EDIT
I am using selen... | Can selenium be used to highlight sections of a web page? | 0.099668 | 0 | 1 | 909 |
14,241,239 | 2013-01-09T16:01:00.000 | 3 | 0 | 0 | 0 | python,html,selenium-webdriver,highlighting | 14,241,261 | 2 | false | 0 | 0 | This is something you need to do with javascript, not python. | 2 | 1 | 0 | Can I have any highlight kind of things using Python 2.7? Say when my script clicking on the submit button,feeding data into the text field or selecting values from the drop-down field, just to highlight on that element to make sure to the script runner that his/her script doing what he/she wants.
EDIT
I am using selen... | Can selenium be used to highlight sections of a web page? | 0.291313 | 0 | 1 | 909 |
14,241,729 | 2013-01-09T16:27:00.000 | -2 | 0 | 0 | 1 | python,hadoop,mapreduce,hbase | 14,675,698 | 2 | false | 1 | 0 | You can very easily do map reduce programming with Python which would interact with thrift server. Hbase client in python would be a thrift client. | 1 | 3 | 0 | We have a HBase implementation over Hadoop. As of now all our Map-Reduce jobs are written as Java classes. I am wondering if there is a good way to use Python scripts to pass to HBase for Map-Reduce. | Pass Python scripts for mapreduce to HBase | -0.197375 | 0 | 0 | 3,776 |
14,242,764 | 2013-01-09T17:18:00.000 | 0 | 0 | 1 | 0 | python,numpy,scipy,python-module | 14,242,912 | 1 | false | 0 | 0 | Use the --user option to easy_install or setup.py to indicate where the installation is to take place. It should point to a directory where you have write access.
Once the module has been built and installed, you then need to set the environmental variable PYTHONPATH to point to that location. When you next run the pyt... | 1 | 1 | 1 | I am totally new to Python, and I have to use some modules in my code, like numpy and scipy, but I have no permission on my hosting to install new modules using easy-install or pip ( and of course I don't know how to install new modules in a directory where I have permission [ I have SSH access ] ).
I have downloaded n... | use / load new python module without installation | 0 | 0 | 0 | 1,476 |
14,243,196 | 2013-01-09T17:41:00.000 | 1 | 0 | 0 | 0 | python,sockets | 14,243,915 | 1 | true | 0 | 0 | Unfortunately, it's not possible to bind to the subset of interfaces using socket module. This module provides access to BSD socket interface, which allow to specify only single address while binding. For this single address a special value of INADDR_ANY in C exists to allow for binding to all interfaces (Python transl... | 1 | 1 | 0 | When binding to a socket in python the value for host can be '' which means all interfaces. Or it can be a string containing a real ip address eg '192.168.1.5'.
So its possible to bind to all or 1 interface.
What if I have 3 interfaces and I want to bind to only 2 of them.
Is this possible?
What value do I give host, ... | Python Sockets Bind to 2 out of 3 network interfaces | 1.2 | 0 | 1 | 885 |
14,244,195 | 2013-01-09T18:41:00.000 | 1 | 0 | 0 | 0 | python,slider,wxpython,color-mapping | 14,260,324 | 1 | true | 0 | 1 | I think you're looking for one of the following widgets:
ColourDialog, ColourSelect, PyColourChooser or CubeColourDialog
They all let you choose colors in different ways and they have a slider to help adjust the colours too.
You can see each of them in action in the wxPython demo (downloadable from the wxPython web pag... | 1 | 0 | 0 | I haven't seen an example of this but I wanted to know if any knows how to implement a colorbar with an adjustable slider using wxpython. Basically the slider should change the levels of the colorbar and as such adjust the colormap.
If anyone has an idea of how to do and possible some example code it would be much app... | colorbar with a slider using wxpython | 1.2 | 0 | 0 | 386 |
14,247,373 | 2013-01-09T22:06:00.000 | 14 | 0 | 1 | 0 | python,comparison,nonetype | 14,247,424 | 6 | false | 0 | 0 | PEP 8 defines that it is better to use the is operator when comparing singletons. | 1 | 268 | 0 | My editor warns me when I compare my_var == None, but no warning when I use my_var is None.
I did a test in the Python shell and determined both are valid syntax, but my editor seems to be saying that my_var is None is preferred.
Is this the case, and if so, why? | Python None comparison: should I use "is" or ==? | 1 | 0 | 0 | 168,994 |
14,250,658 | 2013-01-10T04:05:00.000 | 0 | 0 | 1 | 1 | python,python-3.x | 14,250,723 | 3 | false | 0 | 0 | All arguments that are passed when running your script will be placed in sys.argv. You have to import sys first. And then go through the arguments as you would like to. You might consider counting how many arguments you have to decide what to do. And note that the first argument is always the name of your script. | 1 | 0 | 0 | I'm newbie to Python. I'd like to code a script running on Linux.
To test if user enter all the script arguments:
If user type: myscript => print "Usage: myscript [Dir] [Old] [New]"
If user type: myscript Dir => print "Please enter Old and New"
If user type: myscript Dir Old => print "Please enter New"
If user type a... | Python 3: test command line arguments | 0 | 0 | 0 | 8,127 |
14,250,664 | 2013-01-10T04:06:00.000 | 0 | 0 | 0 | 1 | java,python,cassandra,cql | 25,874,976 | 5 | false | 0 | 0 | What was the replication factor that you used for the keyspace?
How many rows of data does the "users" column family have?
I found myself in a similar situation (yesterday) with replication factor set to 1 and "users" column family having only one row.
Cluster Information:
3 nodes on AWS
Same datacenter name
Keysp... | 3 | 2 | 0 | Cassandra works in cluster model with 3 nodes.When all nodes are "UP", I use cql “select * from User” in cqlsh，Cassandra returns the right result.But after a node is dead,when I use "select" again,no result returns but reports:"Unable to complete request: one or more nodes were unavailable" .
I turned to use cassandra-... | Cassandra reports:"Unable to complete request: one or more nodes were unavailable" when I use CQL:"select * from User" | 0 | 0 | 0 | 3,429 |
14,250,664 | 2013-01-10T04:06:00.000 | 0 | 0 | 0 | 1 | java,python,cassandra,cql | 14,264,889 | 5 | false | 0 | 0 | cqlsh and cli both default to CL.ONE. I suspect the difference is actually that your cqlsh query says "select all the users" while a "get" in the cli is "select exactly one user." | 3 | 2 | 0 | Cassandra works in cluster model with 3 nodes.When all nodes are "UP", I use cql “select * from User” in cqlsh，Cassandra returns the right result.But after a node is dead,when I use "select" again,no result returns but reports:"Unable to complete request: one or more nodes were unavailable" .
I turned to use cassandra-... | Cassandra reports:"Unable to complete request: one or more nodes were unavailable" when I use CQL:"select * from User" | 0 | 0 | 0 | 3,429 |
14,250,664 | 2013-01-10T04:06:00.000 | 2 | 0 | 0 | 1 | java,python,cassandra,cql | 14,258,686 | 5 | false | 0 | 0 | I expect that when you are using CQL you are having a request with a Consistency-Level being "ALL". In this case, it will wait for a reply from all the servers (that host a replica of that node) before returning. As one node is down it fail because it cannot contact the down node.
When you are doing it through Cassandr... | 3 | 2 | 0 | Cassandra works in cluster model with 3 nodes.When all nodes are "UP", I use cql “select * from User” in cqlsh，Cassandra returns the right result.But after a node is dead,when I use "select" again,no result returns but reports:"Unable to complete request: one or more nodes were unavailable" .
I turned to use cassandra-... | Cassandra reports:"Unable to complete request: one or more nodes were unavailable" when I use CQL:"select * from User" | 0.07983 | 0 | 0 | 3,429 |
14,254,053 | 2013-01-10T08:59:00.000 | 0 | 0 | 0 | 0 | python,openerp,erp | 14,257,259 | 2 | false | 1 | 0 | I find another solution. When I click on button Create for res.users in right side bar, in section Customize action Set Default appears. Here you can choose default value which appears when Create button was pressed.
UPDATE:
All these values you can see in
Settings --> Customization --> Low Level Objects --> Actions ... | 2 | 0 | 0 | I need to set up default Home Action for res.user. Currently is Home Page but I want set my custom action. So, I tried create new record for Settings --> Configuration --> Configuration Parameters , but when I set field for Home Action in field Field and set type Many2One in field Type, field Value remains empty list. ... | OpenERP 6.1 web client - set default value (Configuration parameters) | 0 | 0 | 0 | 762 |
14,254,053 | 2013-01-10T08:59:00.000 | 0 | 0 | 0 | 0 | python,openerp,erp | 14,424,152 | 2 | false | 1 | 0 | just an additional note:you can also apply this user defined dafaults with many2many fields like taxes_id field in product model.
however there is a small bug, if you set a default value for many2many fields when you create a new record, many2many field is shown empty, when you save the record you will see it is well r... | 2 | 0 | 0 | I need to set up default Home Action for res.user. Currently is Home Page but I want set my custom action. So, I tried create new record for Settings --> Configuration --> Configuration Parameters , but when I set field for Home Action in field Field and set type Many2One in field Type, field Value remains empty list. ... | OpenERP 6.1 web client - set default value (Configuration parameters) | 0 | 0 | 0 | 762 |
14,254,203 | 2013-01-10T09:08:00.000 | 15 | 0 | 0 | 0 | python,machine-learning,data-mining,classification,scikit-learn | 34,036,255 | 6 | false | 0 | 0 | The simple answer: multiply result!! it's the same.
Naive Bayes based on applying Bayes’ theorem with the “naive” assumption of independence between every pair of features - meaning you calculate the Bayes probability dependent on a specific feature without holding the others - which means that the algorithm multiply e... | 3 | 76 | 1 | I'm using scikit-learn in Python to develop a classification algorithm to predict the gender of certain customers. Amongst others, I want to use the Naive Bayes classifier but my problem is that I have a mix of categorical data (ex: "Registered online", "Accepts email notifications" etc) and continuous data (ex: "Age",... | Mixing categorial and continuous data in Naive Bayes classifier using scikit-learn | 1 | 0 | 0 | 29,596 |
14,254,203 | 2013-01-10T09:08:00.000 | 0 | 0 | 0 | 0 | python,machine-learning,data-mining,classification,scikit-learn | 69,929,209 | 6 | false | 0 | 0 | You will need the following steps:
Calculate the probability from the categorical variables (using predict_proba method from BernoulliNB)
Calculate the probability from the continuous variables (using predict_proba method from GaussianNB)
Multiply 1. and 2. AND
Divide by the prior (either from BernoulliNB or from Gaus... | 3 | 76 | 1 | I'm using scikit-learn in Python to develop a classification algorithm to predict the gender of certain customers. Amongst others, I want to use the Naive Bayes classifier but my problem is that I have a mix of categorical data (ex: "Registered online", "Accepts email notifications" etc) and continuous data (ex: "Age",... | Mixing categorial and continuous data in Naive Bayes classifier using scikit-learn | 0 | 0 | 0 | 29,596 |
14,254,203 | 2013-01-10T09:08:00.000 | 74 | 0 | 0 | 0 | python,machine-learning,data-mining,classification,scikit-learn | 14,255,284 | 6 | true | 0 | 0 | You have at least two options:
Transform all your data into a categorical representation by computing percentiles for each continuous variables and then binning the continuous variables using the percentiles as bin boundaries. For instance for the height of a person create the following bins: "very small", "small", "r... | 3 | 76 | 1 | I'm using scikit-learn in Python to develop a classification algorithm to predict the gender of certain customers. Amongst others, I want to use the Naive Bayes classifier but my problem is that I have a mix of categorical data (ex: "Registered online", "Accepts email notifications" etc) and continuous data (ex: "Age",... | Mixing categorial and continuous data in Naive Bayes classifier using scikit-learn | 1.2 | 0 | 0 | 29,596 |
14,255,289 | 2013-01-10T10:08:00.000 | 2 | 0 | 0 | 1 | python,python-2.7,twisted,failover | 14,266,178 | 2 | false | 0 | 0 | ReconnectingClientFactory doesn't have this capability. You can build your own factory which implements this kind of reconnection logic, mostly by hooking into the clientConnectionFailed factory method. When this is called and the reason seems to you like that justifies switching servers (eg, twisted.internet.error.C... | 1 | 4 | 0 | I have a twisted ReconnectingClientFactory and i can successfully connect to given ip and port couple with this factory. And it works well.
reactor.connectTCP(ip, port, myHandsomeReconnectingClientFactory)
In this situation, when the server is gone, myHandsomeReconnectingClientFactory tries to connect same ip and por... | Twisted: ReconnectingClientFactory connection to different servers | 0.197375 | 0 | 0 | 1,504 |
14,260,447 | 2013-01-10T14:43:00.000 | 1 | 0 | 0 | 0 | python,flask,http-post | 14,270,654 | 1 | true | 1 | 0 | Access them from request.data just like any other form data. | 1 | 0 | 0 | I want to send a image together with some text parameters to a Flask server (HTTP POST).
How can I use Flask to receive both (e.g. save an image and print the text)? | How can I upload images with text parameters using Flask | 1.2 | 0 | 0 | 925 |
14,260,923 | 2013-01-10T15:06:00.000 | 18 | 0 | 0 | 0 | python,random,python-2.7,numbers | 14,260,955 | 8 | false | 0 | 0 | I would generate a list of n random numbers then sort them highest to lowest. | 1 | 4 | 1 | I'm wondering if there's a way to generate decreasing numbers within a certain range?
I want to program to keep outputting until it reaches 0, and the highest number in the range must be positive.
For example, if the range is (0, 100), this could be a possible output:
96
57
43
23
9
0
Sorry for the confusion from my ori... | How to randomly generate decreasing numbers in Python? | 1 | 0 | 0 | 5,706 |
14,261,512 | 2013-01-10T15:36:00.000 | 0 | 0 | 0 | 0 | python,intuit-partner-platform | 27,932,175 | 1 | false | 1 | 0 | I received this error as well and am posting this as pointer for other who stumble upon this. Error Code 22 (Authentication required) for me meant that the OAuth signature was wrong. This was confusing because I couldn't find this error listed in the Quickbooks documents for reconnect.
I was signing the request as a "P... | 1 | 2 | 0 | After completing the oAuth handshake with Intuit Anywhere (AI), I use the API to get the HTML for the blue dot menu. Sometimes, the expected HTML is returned. Other times, I get this message
This API requires Authorization. 22 2013-01-10T15:32:33.43741Z
Typically, this message is returned when the oAuth token is exp... | Sometimes getting "API requires authorization" from intuit anywhere api after a fresh oAuth handshake | 0 | 0 | 1 | 377 |
14,262,433 | 2013-01-10T16:20:00.000 | -2 | 0 | 0 | 0 | python,mongodb,pandas,hdf5,large-data | 59,647,574 | 16 | false | 0 | 0 | At the moment I am working "like" you, just on a lower scale, which is why I don't have a PoC for my suggestion.
However, I seem to find success in using pickle as caching system and outsourcing execution of various functions into files - executing these files from my commando / main file; For example i use a prepare_u... | 4 | 1,156 | 1 | I have tried to puzzle out an answer to this question for many months while learning pandas. I use SAS for my day-to-day work and it is great for it's out-of-core support. However, SAS is horrible as a piece of software for numerous other reasons.
One day I hope to replace my use of SAS with python and pandas, but I ... | "Large data" workflows using pandas | -0.024995 | 0 | 0 | 341,120 |
14,262,433 | 2013-01-10T16:20:00.000 | 21 | 0 | 0 | 0 | python,mongodb,pandas,hdf5,large-data | 29,910,919 | 16 | false | 0 | 0 | One more variation
Many of the operations done in pandas can also be done as a db query (sql, mongo)
Using a RDBMS or mongodb allows you to perform some of the aggregations in the DB Query (which is optimized for large data, and uses cache and indexes efficiently)
Later, you can perform post processing using pandas.
Th... | 4 | 1,156 | 1 | I have tried to puzzle out an answer to this question for many months while learning pandas. I use SAS for my day-to-day work and it is great for it's out-of-core support. However, SAS is horrible as a piece of software for numerous other reasons.
One day I hope to replace my use of SAS with python and pandas, but I ... | "Large data" workflows using pandas | 1 | 0 | 0 | 341,120 |
14,262,433 | 2013-01-10T16:20:00.000 | 167 | 0 | 0 | 0 | python,mongodb,pandas,hdf5,large-data | 20,690,383 | 16 | false | 0 | 0 | I think the answers above are missing a simple approach that I've found very useful.
When I have a file that is too large to load in memory, I break up the file into multiple smaller files (either by row or cols)
Example: In case of 30 days worth of trading data of ~30GB size, I break it into a file per day of ~1GB si... | 4 | 1,156 | 1 | I have tried to puzzle out an answer to this question for many months while learning pandas. I use SAS for my day-to-day work and it is great for it's out-of-core support. However, SAS is horrible as a piece of software for numerous other reasons.
One day I hope to replace my use of SAS with python and pandas, but I ... | "Large data" workflows using pandas | 1 | 0 | 0 | 341,120 |
14,262,433 | 2013-01-10T16:20:00.000 | 72 | 0 | 0 | 0 | python,mongodb,pandas,hdf5,large-data | 19,739,768 | 16 | false | 0 | 0 | If your datasets are between 1 and 20GB, you should get a workstation with 48GB of RAM. Then Pandas can hold the entire dataset in RAM. I know its not the answer you're looking for here, but doing scientific computing on a notebook with 4GB of RAM isn't reasonable. | 4 | 1,156 | 1 | I have tried to puzzle out an answer to this question for many months while learning pandas. I use SAS for my day-to-day work and it is great for it's out-of-core support. However, SAS is horrible as a piece of software for numerous other reasons.
One day I hope to replace my use of SAS with python and pandas, but I ... | "Large data" workflows using pandas | 1 | 0 | 0 | 341,120 |
14,266,235 | 2013-01-10T19:58:00.000 | 2 | 0 | 1 | 0 | python | 14,266,285 | 6 | false | 0 | 0 | One algorithm is this:
Read from the file until you encounter the text "City"
Open a second file in write mode
Stream from the first file into the second
Close both files
Move the second file into the location previously occupied by the first
Although files can be truncated to remove contents after a certain point, t... | 1 | 2 | 0 | I have over 5000 textfiles (also in csv format) with quite a few hundred lines in each.
Everything above a particular phrase, "City" is unnecessary and I need everything beneath it, is there a way (python or batch) to delete everything? | How to delete everything before a key phrase in text files? | 0.066568 | 0 | 0 | 2,371 |
14,267,427 | 2013-01-10T21:18:00.000 | 0 | 0 | 1 | 0 | python,emacs | 18,646,178 | 6 | false | 0 | 0 | This is a bit of a hack, but it worked for me as a quick work-around: to a "M-X replace-string", " " -> " ". Then you have to close and re-open if your emacs does an automatic idnent-detection on the file. Then you have to go through and fix mult-line code (with tab), and strings that have lots of spaces. | 3 | 6 | 0 | I changed python-indent from 3 to 4. I then mark-whole-buffer and indent-for-tab-command. It gave me garbage. | How to re-indent Python code after changing indent width in Emacs? | 0 | 0 | 0 | 2,389 |
14,267,427 | 2013-01-10T21:18:00.000 | 0 | 0 | 1 | 0 | python,emacs | 14,267,505 | 6 | false | 0 | 0 | Try indent-region instead on the buffer. Initially bounded to C-M-\ | 3 | 6 | 0 | I changed python-indent from 3 to 4. I then mark-whole-buffer and indent-for-tab-command. It gave me garbage. | How to re-indent Python code after changing indent width in Emacs? | 0 | 0 | 0 | 2,389 |
14,267,427 | 2013-01-10T21:18:00.000 | 6 | 0 | 1 | 0 | python,emacs | 14,267,477 | 6 | true | 0 | 0 | There is the indent-region function. So I'd try mark the whole buffer, then M-x and type indent-region. It's usually bound to C-M-\, as far as I know.
Edit
Re-indentation does not work for a tab-width change. As I wrote in the comments changing spaces to tabs and then altering the tab-width is a solution:
"Guessing you... | 3 | 6 | 0 | I changed python-indent from 3 to 4. I then mark-whole-buffer and indent-for-tab-command. It gave me garbage. | How to re-indent Python code after changing indent width in Emacs? | 1.2 | 0 | 0 | 2,389 |
14,268,123 | 2013-01-10T22:05:00.000 | 3 | 0 | 1 | 0 | python | 14,268,275 | 3 | false | 0 | 0 | The import statement causes a module to be executed, with all variables being kept in the namespace of the module executed. That is to say, if you import a, then all of a's variables will be under a.[variable]. The from keyword gives slightly different behavior: it puts the variable in the current namespace. For instan... | 1 | 1 | 0 | this is something that I can't quite figure out in pythion's imports.
Let's say I have a module 'a' that imports module 'b' with 'import b'
Then, there is a module 'c' that imports module 'a'.
Will the names form the module 'b' be available in 'c'?
I've checked that it actually depends on how you import the module '... | How enclosed import works in Python | 0.197375 | 0 | 0 | 225 |
14,270,163 | 2013-01-11T01:18:00.000 | 1 | 0 | 1 | 0 | python,object,pandas,dataframe,storage | 14,271,696 | 2 | false | 0 | 0 | Redis with redis-py is one solution. Redis is really fast and there are nice Python bindings. Pytables, as mentioned above, is a good choice as well. PyTables is HDF5, and is really really fast. | 1 | 1 | 1 | I am working on a large project that does SPC analysis and have 1000's of different unrelated dataframe objects. Does anyone know of a module for storing objects in memory? I could use a python dictionary but would like it more elaborate and functional mechanisms like locking, thread safe, who has it and a waiting lis... | Pandas storing 1000's of dataframe objects | 0.099668 | 0 | 0 | 1,701 |
14,271,489 | 2013-01-11T04:03:00.000 | 2 | 1 | 0 | 1 | python,git,api,version | 14,271,577 | 1 | false | 0 | 0 | I think you want to use tags in your git repository. For each version of your api, use git tag vn and you don't need to maintain earlier versions of your files. You can access all files at a certain version just using git checkout vn.
If you use a remote repository, you need to use the flag --tags to send the tags to t... | 1 | 1 | 0 | I currently have a v1 API and have updated and created new scripts for v2. The API is consumed by other developers and consists of a bunch of scripts. Before migrating and adding v2 I want to make sure I have a successful versioning strategy to go ahead with.
Currently, there is a bash script called before using the A... | API Versioning while maintaining git history | 0.379949 | 0 | 0 | 605 |
14,271,653 | 2013-01-11T04:25:00.000 | 2 | 0 | 0 | 1 | python,linux,perl,sed,awk | 14,271,786 | 2 | false | 0 | 0 | This thread is going to start a war on which is best :)
As you know python, you should definitely go with that. I myself have done a lot of text manipulation using python, where everything else tend to become complex.
Even though awk can do what you need, you won't like what you see in the code. | 1 | 0 | 0 | I know bit of all sed, awk , python , but not perl.
I need to parse around 100s of different files , find patterns , match multiple columns with each other and put in new files.
and i have to do that on regular basis.
I just want to know which tool will be best for that scenario.
based on that i will buy that books and... | Which linux tool is best for parsing multiple files simultaneously | 0.197375 | 0 | 0 | 217 |
14,271,697 | 2013-01-11T04:30:00.000 | 1 | 0 | 1 | 0 | python,c,signals,shared-libraries,ctypes | 14,271,698 | 3 | false | 0 | 0 | You will have to declare a signal handler for SIGINT, within the C, which is, hopefully, your project. | 1 | 9 | 0 | When calling a loop being performed in a C shared-library (dynamic library), Python will not receive a KeyboardInterrupt, and nothing will respond (or handle) CTRL+C.
What do I do? | CTRL+C doesn't interrupt call to shared-library using CTYPES in Python | 0.066568 | 0 | 0 | 1,606 |
14,273,593 | 2013-01-11T07:29:00.000 | -1 | 0 | 0 | 0 | python,django | 14,273,720 | 5 | false | 1 | 0 | If you use FireFox you can install FireBug on it and when you for example submit ajax form you can see at which url send you request after what you can easily find controller which work with this form data. At chrome this utility embedded by default and call by F12 key. | 3 | 3 | 0 | I have a new job and a huge django project (15 apps, more than 30 loc). It's pretty hard to understand it's architecture from scratch. Are there any techniques to simplify my work in the beginning? sometimes it's even hard to understand where to find a form or a view that I need... thnx in advance. | Huge Django project | -0.039979 | 0 | 0 | 228 |
14,273,593 | 2013-01-11T07:29:00.000 | 4 | 0 | 0 | 0 | python,django | 14,273,986 | 5 | true | 1 | 0 | When I come to this kind of problem I open up a notebook and answer the following:
1. Infrastructure
Server configuration, OS etc
Check out the database type (mysql, postgres, nosql)
External APIS (e.g Facebook Connect)
2. Backend
Write a simple description
Write its input/output from user (try to be thorough; which... | 3 | 3 | 0 | I have a new job and a huge django project (15 apps, more than 30 loc). It's pretty hard to understand it's architecture from scratch. Are there any techniques to simplify my work in the beginning? sometimes it's even hard to understand where to find a form or a view that I need... thnx in advance. | Huge Django project | 1.2 | 0 | 0 | 228 |
14,273,593 | 2013-01-11T07:29:00.000 | 2 | 0 | 0 | 0 | python,django | 14,274,066 | 5 | false | 1 | 0 | 1) Try to install the site from scratch. You will find what external apps are needed for the site to run.
2) Reverse engineer. Browse through the site and try to find out what you have to do to change something to that page. Start with the url, look up in urls.py, read the view, check the model. Are there any hints to ... | 3 | 3 | 0 | I have a new job and a huge django project (15 apps, more than 30 loc). It's pretty hard to understand it's architecture from scratch. Are there any techniques to simplify my work in the beginning? sometimes it's even hard to understand where to find a form or a view that I need... thnx in advance. | Huge Django project | 0.07983 | 0 | 0 | 228 |
14,277,088 | 2013-01-11T11:19:00.000 | 13 | 0 | 0 | 0 | python,pip,firewall | 14,277,298 | 2 | true | 0 | 0 | You need to open up your firewall to the download locations of any package you need to install, or connect to a proxy server that has been given access.
Note that the download location is not necessarily on PyPI. The Python package index is a metadata service, one that happens to also provide storage for the indexed pa... | 2 | 28 | 0 | I have a server, onto which I want to use Python, that is behind a company firewall. I do not want to mess with it and the only thing I can do is to make a firewall exception for specific URL/domains.
I also want to access packages located on PYPI, using pip or easy_install. Therefore, do you know which URL should I as... | what url should I authorize to use pip behind a firewall? | 1.2 | 0 | 1 | 29,142 |
14,277,088 | 2013-01-11T11:19:00.000 | 5 | 0 | 0 | 0 | python,pip,firewall | 67,416,056 | 2 | false | 0 | 0 | I've solved it adding these domains to the firewall whitelist:
pypi.python.org
pypi.org
pythonhosted.org | 2 | 28 | 0 | I have a server, onto which I want to use Python, that is behind a company firewall. I do not want to mess with it and the only thing I can do is to make a firewall exception for specific URL/domains.
I also want to access packages located on PYPI, using pip or easy_install. Therefore, do you know which URL should I as... | what url should I authorize to use pip behind a firewall? | 0.462117 | 0 | 1 | 29,142 |
14,277,172 | 2013-01-11T11:24:00.000 | 0 | 0 | 0 | 0 | python,wsgi | 14,285,052 | 2 | false | 1 | 0 | in uWSGI (if using the uwsgi protocol) you can pass additional variables with uwsgi_param key value in nginx, SetEnv in apache (both mod_uwsgi and mod_proxy_uwsgi), cgi vars with Cherokee and --http-var with the uwsgi http router.
For the http protocol (in gunicorn or uWSGI http-socket) the only solution popping in my... | 1 | 0 | 0 | Is there a way to distribute a WSGI application that will work out of the box with any server and that will be configurable using the server's built-in features only?
This means that the only configuration file the administrator would have to touch would be the server's configuration file. It wouldn't be necessary to w... | How to make a WSGI app configurable by any server? | 0 | 0 | 0 | 253 |
14,278,009 | 2013-01-11T12:14:00.000 | 0 | 0 | 1 | 0 | python,virtualenv,pycharm,pylint | 71,898,652 | 4 | false | 0 | 0 | In Tool Settings, set Program: to $PyInterpreterDirectory$/pylint | 3 | 9 | 0 | Using the PyCharm IDE, when setting up an external tool, how can you set up the external tools with a path relative to use the current virtual env defaults.?
An example being pylint - where I'd want the virtual env version and not the system one to run. | Pycharm External tools relative to Virtual Environment | 0 | 0 | 0 | 3,302 |
14,278,009 | 2013-01-11T12:14:00.000 | 0 | 0 | 1 | 0 | python,virtualenv,pycharm,pylint | 14,508,728 | 4 | false | 0 | 0 | just found your post while looking for documentation about the "variables" that could bew used when setting parameters for external tools.
No documentation but you can see a list of all the available stuff after pressing thE "INSERT MACRO" button in the Edit Tool dialog.
I don't see any reference to the interpreter pa... | 3 | 9 | 0 | Using the PyCharm IDE, when setting up an external tool, how can you set up the external tools with a path relative to use the current virtual env defaults.?
An example being pylint - where I'd want the virtual env version and not the system one to run. | Pycharm External tools relative to Virtual Environment | 0 | 0 | 0 | 3,302 |
14,278,009 | 2013-01-11T12:14:00.000 | 16 | 0 | 1 | 0 | python,virtualenv,pycharm,pylint | 33,673,270 | 4 | false | 0 | 0 | Not sure about older versions, but in PyCharm 5 one can use $PyInterpreterDirectory$ macro. It's exactly that we want | 3 | 9 | 0 | Using the PyCharm IDE, when setting up an external tool, how can you set up the external tools with a path relative to use the current virtual env defaults.?
An example being pylint - where I'd want the virtual env version and not the system one to run. | Pycharm External tools relative to Virtual Environment | 1 | 0 | 0 | 3,302 |
14,281,308 | 2013-01-11T15:27:00.000 | 0 | 1 | 1 | 0 | python,performance | 14,281,528 | 1 | false | 0 | 0 | Most newer Python versions bring new features.
Existing code parts are probably updated as well, either for performance or for extended functionality.
The former kind of changes bring a performance benefit, but extended functionality might lead to a poorer performance.
I don't know what is the relationship between thes... | 1 | 2 | 0 | I'm working on an open source project (Master of Mana, a mod for Civilization 4) which uses Python 2.4.1 for several game mechanics. Is there a chance for a performance improvement if I try to upgrade to Python 2.7.3 or even 3.3.0?
Related to this, has anyone done a performance analysis on different Python versions? | Upgrading to a newer Python version - performance improvements? | 0 | 0 | 0 | 379 |
14,284,492 | 2013-01-11T18:32:00.000 | 30 | 0 | 0 | 0 | python,tkinter,colors,text-cursor | 14,284,594 | 3 | true | 0 | 1 | You can change the insertbackground option of the text widget to whatever you want. | 1 | 21 | 0 | I have a text widget with dark background and I can't see the cursor's position. Is there any way to change the (blinking) text cursor's color? | How to change text cursor color in Tkinter? | 1.2 | 0 | 0 | 12,336 |
14,287,141 | 2013-01-11T21:43:00.000 | 5 | 1 | 1 | 0 | python,algorithm,structure | 14,287,198 | 3 | false | 0 | 0 | Learning the syntax of a programming language to express an algorithm is like learning the syntax of English to express a thought.
Sure, there are nuances in English that allow you to express some thoughts better than others or in other languages. However, a command of English does not automatically enable you to be ab... | 1 | 0 | 0 | I'm a complete Noob, having studied Python 2.7 for less than four days using eclipse on a mac, and I have managed to write a "FizzBang" from scratch in about 20 minutes, but....I'm having one heck of a time with basic algorithms. I'm wondering if this is something I'll speed up at in time, or if there is some sort of "... | Beginning Python trouble with basic algorithms | 0.321513 | 0 | 0 | 590 |
14,288,177 | 2013-01-11T23:13:00.000 | 1 | 0 | 1 | 0 | python,automation,interop,concept | 14,288,210 | 5 | false | 0 | 0 | You should look into a package called selenium for interacting with web browsers | 1 | 27 | 0 | I'm having the idea of writing a program using Python which shall find a lyric of a song whose name I provided. I think the whole process should boil down to couple of things below. These are what I want the program to do when I run it:
prompt me to enter a name of a song
copy that name
open a web browser (google chro... | Interact with other programs using Python | 0.039979 | 0 | 0 | 89,546 |
14,289,656 | 2013-01-12T02:41:00.000 | 0 | 0 | 0 | 0 | c++,python | 14,289,688 | 2 | false | 0 | 1 | Due to complexities of the C++ ABI (such as name mangling), it's generally difficult and platform-specific to load a C++ library directly from Python using ctypes.
I'd recommend you either create a simple C API which can be easily wrapped with ctypes, or use SWIG to generate wrapper types and a proper extension module ... | 1 | 0 | 0 | I'm a Python guy building a Linux-based web service for a client who wants me to interface with a small C++ library that they're currently using with a bunch of Windows based VB applications.
They have assured me that the library is fairly simple (as far as they go I guess), and that they just need to know how best to ... | How does one get a C++ library loaded into Python as a shared object file (.so)? | 0 | 0 | 0 | 201 |
14,289,657 | 2013-01-12T02:41:00.000 | 3 | 1 | 1 | 0 | python,c,python-imaging-library | 14,289,791 | 2 | false | 0 | 1 | Yes, coding the same algorithm in Python and in C, the C implementation will be faster. This is definitely true for the usual Python interpreter, known as CPython. Another implementation, PyPy, uses a JIT, and so can achieve impressive speeds, sometimes as fast as a C implementation. But running under CPython, the P... | 2 | 0 | 0 | I was using PIL to do image processing, and I tried to convert a color image into a grayscale one, so I wrote a Python function to do that, meanwhile I know PIL already provides a convert function to this.
But the version I wrote in Python takes about 2 seconds to finish the grayscaling, while PIL's convert almost inst... | performance concern, Python vs C | 0.291313 | 0 | 0 | 318 |
14,289,657 | 2013-01-12T02:41:00.000 | 2 | 1 | 1 | 0 | python,c,python-imaging-library | 14,290,456 | 2 | false | 0 | 1 | If you want to do image processing, you can use
OpenCV(cv2), SimpleCV, NumPy, SciPy, Cython, Numba ...
OpenCV, SimpleCV SciPy have many image processing routines already.
NumPy can do operations on arrays in c speed.
If you want loops in Python, you can use Cython to compile your python code with static declaration in... | 2 | 0 | 0 | I was using PIL to do image processing, and I tried to convert a color image into a grayscale one, so I wrote a Python function to do that, meanwhile I know PIL already provides a convert function to this.
But the version I wrote in Python takes about 2 seconds to finish the grayscaling, while PIL's convert almost inst... | performance concern, Python vs C | 0.197375 | 0 | 0 | 318 |
14,294,643 | 2013-01-12T15:10:00.000 | 1 | 1 | 0 | 0 | python,performance,gevent,pypy | 14,294,862 | 3 | false | 1 | 0 | Builtin flask server is a BaseHTTPServer or so, never use. The best scenario is very likely tornado + pypy or something like that. Benchmark before using though. It also depends quite drastically on what you're doing. The web server + web framework benchmarks are typically hello world kind of benchmarks. Is your applic... | 1 | 25 | 0 | Both 'pypy' and 'gevent' are supposed to provide high performance. Pypy is supposedly faster than CPython, while gevent is based on co-routines and greenlets, which supposedly makes for a faster web server.
However, they're not compatible with each other.
I'm wondering which setup is more efficient (in terms of speed/p... | Which setup is more efficient? Flask with pypy, or Flask with gevent? | 0.066568 | 0 | 0 | 15,866 |
14,296,401 | 2013-01-12T18:12:00.000 | 0 | 0 | 0 | 0 | php,python,pygame | 14,296,430 | 1 | false | 0 | 1 | If I got you right, then answer is: no, it's impossible. I think — Flash is most acceptable choice for you, or Unity3D with browser plugin. | 1 | 0 | 0 | Is there a method to add python pygame with images to PHP and display it in a local browser? What are the necessary requirements to do something like this? | Is there a way to add Pygame into a local PHP file? | 0 | 0 | 0 | 71 |
14,296,403 | 2013-01-12T18:12:00.000 | 3 | 0 | 1 | 0 | python,list,loops,python-3.x | 14,296,587 | 2 | false | 0 | 0 | Try using filter:
newlist = filter(lambda a: a>0, [1,2,3])
or
[i for i in original_list if i > 0] (as mentioned in comments above) | 1 | 2 | 0 | I am trying to create a new list inside a looping (without change the name) which will cut all the negative or zero elements, eventually changing its length. Who is the fastest way to do that? I have lost the last days trying to do... | Create new list with positive elements | 0.291313 | 0 | 0 | 4,133 |
14,296,531 | 2013-01-12T18:24:00.000 | 1 | 0 | 1 | 0 | python,pip,distribute | 63,071,271 | 7 | false | 0 | 0 | I tried the above solutions. However, I only can resolve the problem until I do:
sudo pip3 install -U pip (for python3) | 2 | 116 | 0 | I seem to have suddenly started to encounter the error error: option --single-version-externally-managed not recognized when using pip install with various packages (including PyObjC and astropy).
I've never seen this error before, but it's now also showing up on travis-ci builds for which nothing has changed.
Does thi... | What does "error: option --single-version-externally-managed not recognized" indicate? | 0.028564 | 0 | 0 | 86,694 |
14,296,531 | 2013-01-12T18:24:00.000 | 9 | 0 | 1 | 0 | python,pip,distribute | 26,632,384 | 7 | false | 0 | 0 | Try upgrading setuptools like this:
pip install --upgrade setuptools | 2 | 116 | 0 | I seem to have suddenly started to encounter the error error: option --single-version-externally-managed not recognized when using pip install with various packages (including PyObjC and astropy).
I've never seen this error before, but it's now also showing up on travis-ci builds for which nothing has changed.
Does thi... | What does "error: option --single-version-externally-managed not recognized" indicate? | 1 | 0 | 0 | 86,694 |
14,297,741 | 2013-01-12T20:39:00.000 | 3 | 0 | 1 | 1 | python,ipython | 32,446,382 | 3 | false | 0 | 0 | I assume you don't want to run the program as root. So this is my modified version that runs as <username> (put in /etc/rc.local before the exit 0 line):
su <username> -c "/usr/bin/ipython notebook --no-browser --profile <profilename> &"
You can check to make sure your ipython is at that path with which ipython. Though... | 1 | 20 | 0 | I love ipython, especially the notebook feature. I currently keep a screen session running with the notebook process in it. How would I add ipython's notebook engine/webserver to my system's (CentOS5) startup procedures? | How to start ipython notebook server at boot as daemon | 0.197375 | 0 | 0 | 20,905 |
14,304,328 | 2013-01-13T14:16:00.000 | 8 | 0 | 0 | 0 | python | 60,393,428 | 2 | false | 0 | 0 | I had the exact same problem. winsound.Beep used to work just fine and then it suddenly stopped working (or that's what I thought). The problem was that someone (or some update) had turned off the System sounds, which prevented windows from playing the Beep sound, either manually or through my program. Try right clicki... | 1 | 5 | 0 | I am trying to make some Beep noises with the winsound.Beep command. However when I am using winsound.Beep(500, 500) I do not hear anything. With winsound.MessageBeep and winsound.PlaySound however, I DO get to play sounds. Any ideas what I should do?
What I am trying to do: I want to write a little practicing program ... | Can't get winsound.Beep to work | 1 | 0 | 0 | 8,764 |
14,304,420 | 2013-01-13T14:27:00.000 | 0 | 0 | 0 | 0 | python-2.7,scikit-learn | 14,309,807 | 1 | true | 0 | 0 | Maybe you could extract the top n important features and then compute pairwise Spearman's or Pearson's correlations for those in order to detect redundancy only for the top informative features as it might not be feasible to compute all pairwise feature correlations (quadratic with the number of features).
There might ... | 1 | 1 | 1 | I am using the Scikit-learn Extremely Randomized Trees algorithm to get info about the relative feature importances and I have a question about how "redundant features" are ranked.
If I have two features that are identical (redundant) and important to the classification, the extremely randomized trees cannot detect the... | Feature importance based on extremely randomize trees and feature redundancy | 1.2 | 0 | 0 | 203 |
14,307,581 | 2013-01-13T20:03:00.000 | 1 | 0 | 0 | 1 | python,google-app-engine,django-nonrel | 14,368,275 | 2 | false | 1 | 0 | Did you update djangoappengine without updating django-nonrel and djangotoolbox?
While I haven't upgraded to GAE 1.7.4 yet, I'm running 1.7.2 with no problems. I suspect your problem is not related to the GAE SDK but rather your django-nonrel installation has mismatching pieces. | 2 | 0 | 0 | I had GAE 1.4 installed in my local UBUNTU system and everything was working fine. Only warning I was getting at that time was something like "You are using old GAE SDK 1.4." So, to get rid of that I have done following things:
I removed old version of GAE and installed GAE 1.7. Along with that I have
also changed my ... | Django-nonrel broke after installing new version of Google App Engine SDK | 0.099668 | 1 | 0 | 191 |
14,307,581 | 2013-01-13T20:03:00.000 | 0 | 0 | 0 | 1 | python,google-app-engine,django-nonrel | 14,382,654 | 2 | true | 1 | 0 | Actually I changed the google app engine path in /.bashrc file and restarted the system. It solved the issue. I think since I was not restarting the system after .bashrc changes, hence it was creating problem. | 2 | 0 | 0 | I had GAE 1.4 installed in my local UBUNTU system and everything was working fine. Only warning I was getting at that time was something like "You are using old GAE SDK 1.4." So, to get rid of that I have done following things:
I removed old version of GAE and installed GAE 1.7. Along with that I have
also changed my ... | Django-nonrel broke after installing new version of Google App Engine SDK | 1.2 | 1 | 0 | 191 |
14,308,889 | 2013-01-13T22:23:00.000 | 2 | 0 | 0 | 0 | python,arrays | 14,309,992 | 1 | true | 0 | 0 | Given your description, a sparse representation may not be very useful to you. There are many other options, though:
Make sure your values are represented using the smallest data type possible. The example you show above is best represented as single-byte integers. Reading into a numpy array or python array will give... | 1 | 0 | 1 | I read in an large python array from a csv file (20332 *17009) using window7 64 bit OS machine with 12 G ram. The array has values in the half of places, like the example below. I only need the array where has values for analysis, rather than the whole array.
[0 0 0 0 0 0
0 0 0 3 8 0
0 4 2 7 0 0
0 0 5 2 0 0
0 0 1 0 0 ... | How to save memory for a large python array? | 1.2 | 0 | 0 | 733 |
14,309,149 | 2013-01-13T22:50:00.000 | 0 | 0 | 1 | 0 | c++,python,algorithm,dynamic-programming | 14,326,063 | 2 | false | 0 | 0 | I think there is a dynamic programming solution that is just about tractable if path length is just the number of links in the paths (so links don't have weights).
Work from the leaves up. At each node you need to keep track of the best pair of solutions confined to the subtree with root at that node, and, for each k, ... | 1 | 0 | 0 | I have a simple, non-dirictional tree T. I should find a path named A and another named B that A and B have no common vertex. The perpuse is to maxmize the Len(A)*Len(B).
I figured this problem is similer to Partition Problem, except in Partition Problem you have a set but here you have a Equivalence set. The solution ... | Partition in Equivalence sets | 0 | 0 | 0 | 163 |
14,314,019 | 2013-01-14T06:12:00.000 | 1 | 0 | 0 | 1 | python,linux,share,cifs | 14,489,863 | 2 | false | 0 | 0 | What about this?:
Change the windows share to point to an actual Linux directory reserved for the purpose. Then, with simple Linux scripts, you can readily determine if any files there have any writers. Once there is a file not being written to, copy it to the windows folder—if that is where it needs to be. | 1 | 9 | 0 | I'm trying to write a script to take video files (ranging from several MB to several GB) written to a shared folder on a Windows server.
Ideally, the script will run on a Linux machine watching the Windows shared folder at an interval of something like every 15-120 seconds, and upload any files that have fully finished... | How to tell if a file is being written to a Windows CIFS share from Linux | 0.099668 | 0 | 0 | 3,260 |
14,323,390 | 2013-01-14T17:21:00.000 | 0 | 0 | 0 | 0 | python,qt,video,pyside,phonon | 14,509,771 | 3 | true | 0 | 1 | OK - for others out there looking for the same info, I found Hachoir-metadata and Hachoir-parser (https://bitbucket.org/haypo/hachoir/wiki/Home).
They provide the correct info but there is a serious lack of docs for it and not that many examples that I can find. Therefore, while I have parsed a video file and returned... | 1 | 0 | 0 | Can anybody tell me how I can return the dimensions of a video (pixel height/width) using Qt (or any other Python route to that information). I have googled the hell out of it and cannot find a straight answer.
I assumed it would either be mediaobject.metadata() or os.stat() but neither appear to return the required i... | qt phonon - returning video dimensions | 1.2 | 0 | 0 | 305 |
14,325,773 | 2013-01-14T20:03:00.000 | 7 | 0 | 0 | 0 | python,matplotlib | 53,153,007 | 2 | false | 0 | 0 | This is several years after you asked the question, but the only way I've found to do it is to change the matplotlib.rc.
You can do this either in the actual .rc file or within your python script, e.g.
import matplotlib as mpl
mpl.rc('hatch', color='k', linewidth=1.5)
This will make all of the hatch lines in your scri... | 1 | 52 | 0 | In this example of a marker from my scatter plot I have set the color to green, and edge color to black, and hatch to "|". For the hatch pattern to show up at all I must set the edgecolor, however when I do, I get a very thick border around the marker. Two questions:
1) How can I to set the size of this border (prefe... | How to change marker border width and hatch width? | 1 | 0 | 0 | 99,634 |
14,327,036 | 2013-01-14T21:29:00.000 | 29 | 0 | 0 | 0 | python,django,performance | 14,327,315 | 5 | false | 1 | 0 | I think using len(qs) makes more sense here as you need to iterate over the results. qs.count() is a better option if all that you want to do it print the count and not iterate over the results.
len(qs) will hit the database with select * from table whereas qs.count() will hit the db with select count(*) from table.
al... | 1 | 113 | 0 | In Django, given that I have a QuerySet that I am going to iterate over and print the results of, what is the best option for counting the objects? len(qs) or qs.count()?
(Also given that counting the objects in the same iteration is not an option.) | Count vs len on a Django QuerySet | 1 | 0 | 0 | 92,515 |
14,327,219 | 2013-01-14T21:39:00.000 | 1 | 0 | 1 | 0 | emacs,ipython,python-mode | 14,430,802 | 1 | false | 0 | 0 | Well it seems that the latest build of ipython (2927) in conjuction with python-mode 6.0.1. solves this issue. | 1 | 0 | 0 | I am using python-mode 6.0.10 with the ipython console. When I try to bring up a previous history item it is shifted to the left preceeding the console input prompt e.g.
In [51]: (hit M-p to get previous item)
plt.plot(u_class)In[51]: (hitting M-p after this yields a "not a command line" error).
What I have to do now ... | previous item in ipython console emacs shifts text to the left before console prompt | 0.197375 | 0 | 0 | 92 |
14,328,369 | 2013-01-14T22:59:00.000 | 1 | 0 | 1 | 0 | python,python-docx | 24,855,520 | 3 | false | 0 | 0 | As of v0.7.2, python-docx translates '\n' and '\r' characters in a string to <w:br/> elements, which provides the behavior you describe. It also translates '\t' characters into <w:tab/> elements.
This behavior is available for strings provided to:
Document.add_paragraph()
Paragraph.add_run()
and for strings assigned ... | 1 | 9 | 0 | Python Docx is a pretty good library for generating Microsoft Word documents for something that doesn't directly deal with all of the COM stuff. Nonetheless, I'm running into some limitations.
Does anyone have any idea how one would put a carriage return in a string of text?
I want a paragraph to have multiple lines... | Python Docx Carriage Return | 0.066568 | 0 | 0 | 13,703 |
14,334,222 | 2013-01-15T09:03:00.000 | 0 | 0 | 0 | 1 | python,webserver,subdomain,tornado,saas | 14,342,790 | 2 | false | 1 | 0 | Tornado itself does not handle subdomains.
You will need to something like NGNIX to control subdomain access. | 2 | 2 | 0 | I have a web app which runs at www.mywebsite.com.
I am asking user to register and enter a subdomain name for their login. e.g. if user enters subdomain as "demo", then his login url should be "www.demo.mywebsite.com".
How this can be done in tornado web app, as tornado itself is a web server.
Or serving the app with n... | sub domains in tornado web app for SAAS | 0 | 0 | 0 | 791 |
14,334,222 | 2013-01-15T09:03:00.000 | 3 | 0 | 0 | 1 | python,webserver,subdomain,tornado,saas | 14,419,302 | 2 | false | 1 | 0 | self.request.host under tornado.web.RequestHandler will contain subdomain so you can change application logic according to subdomain eg. load current_user based on cookie + subdomain. | 2 | 2 | 0 | I have a web app which runs at www.mywebsite.com.
I am asking user to register and enter a subdomain name for their login. e.g. if user enters subdomain as "demo", then his login url should be "www.demo.mywebsite.com".
How this can be done in tornado web app, as tornado itself is a web server.
Or serving the app with n... | sub domains in tornado web app for SAAS | 0.291313 | 0 | 0 | 791 |
14,334,667 | 2013-01-15T09:31:00.000 | 0 | 0 | 0 | 0 | python,django,django-forms,django-widget | 14,334,871 | 1 | false | 1 | 0 | This seems overly complicated. Apart from anything else, tying up an entire process waiting for someone to fill in a form is a bad idea.
Although I can't really understand exactly what you want to do, it seems likely that there are better solutions. Here's a few possibilities:
Page A redirects to Page B before initial... | 1 | 0 | 0 | I have a page "A" with some CharField to fill programmatically. The value to fill come from another page "B", opened by javascript code executed only when the page is showed (after the init). This is the situation:
page A __init__
during the init, start a thread listening on the port 8080
page A initialized and showed... | Change CharField value after init | 0 | 0 | 0 | 232 |
14,335,832 | 2013-01-15T10:34:00.000 | 1 | 0 | 0 | 0 | python,django,user-interface,django-views | 14,335,895 | 3 | false | 1 | 0 | This is a very wide-ranging question. One solution would be to store a trial flag on each user. On an authenticated request, check for User.trial in your controller (and probably view) and selectively allow/deny access to the endpoint or selectively render parts of the page.
If you wish to use built-in capabilities of ... | 1 | 1 | 0 | I am using Django, and require certain 'trial' users only to activate a certain part of the website-any ideas on an efficient way to do this?
I was thinking about giving a paying customer a certain ID and linking this to the URL of the sites for permission.
Thanks,
Tom | Restrict so users only view a certain part of website-Django | 0.066568 | 0 | 0 | 1,610 |
14,340,366 | 2013-01-15T14:55:00.000 | 69 | 0 | 1 | 0 | python | 14,340,509 | 3 | true | 0 | 0 | If you don't want environment variable substitution, then use RawConfigParser, not ConfigParser. | 1 | 41 | 0 | Stupid question with (for sure) simple answer...
I am using configparser to read some strings from a file. When the string has the '%' symbol ($%& for example) it complains:
ConfigParser.InterpolationSyntaxError: '%' must be followed by '%' or '(', found: "%&'"
Anybody familiar with this?
Thanks! | Configparser and string with % | 1.2 | 0 | 0 | 26,866 |
14,341,737 | 2013-01-15T16:03:00.000 | 0 | 0 | 0 | 1 | python,unix | 14,341,933 | 2 | false | 0 | 0 | If your program is *nix-specific, I suppose your best bet is parsing the output of mount command.
It gives you mount points, user names, and FS names. Of them you could filter points mounted or at least writable by the current user, with a right FS on it (possibly vfat?). | 1 | 0 | 0 | I'm writing a Python program that uses dd to write an OS image to a USB flash drive. Drives /dev/sda and /dev/sdb are mounted, in my case, with sdb being the flash drive I want to write to.
However, on someone else's system, the drive they want to write to might be /dev/sdc. How do I let the user choose what drive to w... | Choose from disks in Python? | 0 | 0 | 0 | 170 |
14,343,871 | 2013-01-15T17:59:00.000 | 0 | 0 | 0 | 1 | python,google-app-engine,python-2.7 | 14,365,980 | 3 | false | 1 | 0 | I would say precompute those structures and output them into hardcoded python structures that you save in a generated python file.
Just read those structures into memory as part of your instance startup.
From your description, there's no reason to compute these values at runtime, and there's no reason to store it in th... | 2 | 1 | 0 | I'm working on an NDB based Google App Engine application that needs to keep track of the day/night cycle of a large number (~2000) fixed locations. Because the latitude and longitude don't ever change, I can precompute them ahead of time using something like PyEphem. I'm using NDB. As I see it, the possible strateg... | Best strategy for storing precomputed sunrise/sunset data? | 0 | 1 | 0 | 537 |
14,343,871 | 2013-01-15T17:59:00.000 | 1 | 0 | 0 | 1 | python,google-app-engine,python-2.7 | 14,345,283 | 3 | false | 1 | 0 | For 2000 immutable data points - just calculate them when instance starts or on first use, then keep it in memory. This will be the cheapest and fastest. | 2 | 1 | 0 | I'm working on an NDB based Google App Engine application that needs to keep track of the day/night cycle of a large number (~2000) fixed locations. Because the latitude and longitude don't ever change, I can precompute them ahead of time using something like PyEphem. I'm using NDB. As I see it, the possible strateg... | Best strategy for storing precomputed sunrise/sunset data? | 0.066568 | 1 | 0 | 537 |
14,344,473 | 2013-01-15T18:33:00.000 | 0 | 0 | 0 | 0 | python,mysql,django | 27,122,957 | 2 | false | 1 | 0 | Used django-celery package and created job in it to update the data periodically | 2 | 1 | 0 | I have income table which contain recurrence field. Now if user select recurrence_type as "Monthly" or "Daily" then I have to add row into income table "daily" or "monthly" . Is there any way in Mysql which will add data periodically into table ? I am using Django Framework for developing web application. | add data to table periodically in mysql | 0 | 1 | 0 | 214 |
14,344,473 | 2013-01-15T18:33:00.000 | 1 | 0 | 0 | 0 | python,mysql,django | 14,344,610 | 2 | true | 1 | 0 | As I know there is no such function in MySQL. Even if MySQL could do it, this should not be its job. Such functions should be part of the business logic in your application.
The normal way is to setup the cron job in server. The cron job will wake up at the time you set, and then call your python script or SQL to fulfi... | 2 | 1 | 0 | I have income table which contain recurrence field. Now if user select recurrence_type as "Monthly" or "Daily" then I have to add row into income table "daily" or "monthly" . Is there any way in Mysql which will add data periodically into table ? I am using Django Framework for developing web application. | add data to table periodically in mysql | 1.2 | 1 | 0 | 214 |
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