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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1,285,024 | 2009-08-16T18:48:00.000 | 11 | 1 | 0 | 1 | python,interactive | 1,285,056 | 3 | false | 0 | 0 | You should simply add a command-line switch in the scheduled task, and check for it in your script, modifying the behavior as appropriate. Explicit is better than implicit.
One benefit to this design: you'll be able to test both behaviors, regardless of how you actually invoked the script. | 1 | 2 | 0 | I'd like for a script of mine to have 2 behaviours, one when started as a scheduled task, and another if started manually. How could I test for interactiveness?
EDIT: this could either be a cron job, or started by a windows batch file, through the scheduled tasks. | How can I check to see if a Python script was started interactively? | 1 | 0 | 0 | 1,179 |
1,285,150 | 2009-08-16T19:34:00.000 | 1 | 0 | 0 | 1 | python,google-app-engine,comet,server-push,channel-api | 2,784,805 | 6 | false | 1 | 0 | 30 seconds is more than enough; either way you should return a no-op message when a time passed and no new events occur.
This prevents client timeouts and is done by everybody who does comet.
Just send the request, and on the server make it wait until an event or timeout after 25 seconds. | 4 | 25 | 0 | How can I implement Comet / Server push in Google App Engine in Python? | Implement Comet / Server push in Google App Engine in Python | 0.033321 | 0 | 0 | 11,567 |
1,285,150 | 2009-08-16T19:34:00.000 | 0 | 0 | 0 | 1 | python,google-app-engine,comet,server-push,channel-api | 3,918,651 | 6 | false | 1 | 0 | Looking inside the App Engine 1.3.8-pre release, I see the Channel API service stub and more code. So it looks like we can start trying it out locally. | 4 | 25 | 0 | How can I implement Comet / Server push in Google App Engine in Python? | Implement Comet / Server push in Google App Engine in Python | 0 | 0 | 0 | 11,567 |
1,285,150 | 2009-08-16T19:34:00.000 | 3 | 0 | 0 | 1 | python,google-app-engine,comet,server-push,channel-api | 1,285,251 | 6 | false | 1 | 0 | At this time, I would rule out doing Comet in App Engine (any language). Comet is based on long-lived HTTP connections, and App Engine will time out any single connection in about 30 seconds or so at most; it's hard to conceive of a worse match! | 4 | 25 | 0 | How can I implement Comet / Server push in Google App Engine in Python? | Implement Comet / Server push in Google App Engine in Python | 0.099668 | 0 | 0 | 11,567 |
1,285,150 | 2009-08-16T19:34:00.000 | 0 | 0 | 0 | 1 | python,google-app-engine,comet,server-push,channel-api | 4,480,891 | 6 | false | 1 | 0 | Google App Engine supports server push using the Channel API since 2nd December. | 4 | 25 | 0 | How can I implement Comet / Server push in Google App Engine in Python? | Implement Comet / Server push in Google App Engine in Python | 0 | 0 | 0 | 11,567 |
1,286,176 | 2009-08-17T04:38:00.000 | 1 | 0 | 0 | 0 | python,django | 1,286,187 | 6 | false | 1 | 0 | I doubt there are technical manuals on the subject. It might take a bit of digging, but the API documentation and the source code are your best bets for reliable, up-to-date information. | 2 | 8 | 0 | Where can i get the technical manuals/details of how django internals work, i.e. i would like to know when a request comes in from a client;
which django function receives it?
what middleware get called?
how is the request object created? and what class/function creates it?
What function maps the request to the nece... | Where can i get technical information on how the internals of Django works? | 0.033321 | 0 | 0 | 1,249 |
1,286,176 | 2009-08-17T04:38:00.000 | 12 | 0 | 0 | 0 | python,django | 1,286,186 | 6 | false | 1 | 0 | "Use the source, Luke." The beauty of open source software is that you can view (and modify) the code yourself. | 2 | 8 | 0 | Where can i get the technical manuals/details of how django internals work, i.e. i would like to know when a request comes in from a client;
which django function receives it?
what middleware get called?
how is the request object created? and what class/function creates it?
What function maps the request to the nece... | Where can i get technical information on how the internals of Django works? | 1 | 0 | 0 | 1,249 |
1,286,757 | 2009-08-17T08:24:00.000 | 9 | 0 | 1 | 0 | python,optimization | 1,286,777 | 5 | true | 0 | 0 | Fast enough as opposed to what? How do you do it right now? What exactly are you storing, what exactly are you retrieving? The answer probably highly depends on this. Which brings us to ...
Measure! Don't discuss and analyze theoretically; try and measure what is the more performant way. Then decide whether the possibl... | 3 | 10 | 0 | In order to save space and the complexity of having to maintain the consistency of data between different sources, I'm considering storing start/end indices for some substrings instead of storing the substrings themselves. The trick is that if I do so, it's possible I'll be creating slices ALL the time. Is this somet... | how fast is python's slice | 1.2 | 0 | 0 | 7,845 |
1,286,757 | 2009-08-17T08:24:00.000 | -2 | 0 | 1 | 0 | python,optimization | 1,286,918 | 5 | false | 0 | 0 | premature optimization is the rool of all evil.
Prove to yourself that you really have a need to optimize code, then act. | 3 | 10 | 0 | In order to save space and the complexity of having to maintain the consistency of data between different sources, I'm considering storing start/end indices for some substrings instead of storing the substrings themselves. The trick is that if I do so, it's possible I'll be creating slices ALL the time. Is this somet... | how fast is python's slice | -0.07983 | 0 | 0 | 7,845 |
1,286,757 | 2009-08-17T08:24:00.000 | 1 | 0 | 1 | 0 | python,optimization | 1,289,744 | 5 | false | 0 | 0 | Would slices be ineffective because they create copies of the source string? This may or may not be an issue. If it turns out to be an issue, would it not be possible to simply implement a "String view"; an object that has a reference to the source string and has a start and end point.. Upon access/iteration, it just r... | 3 | 10 | 0 | In order to save space and the complexity of having to maintain the consistency of data between different sources, I'm considering storing start/end indices for some substrings instead of storing the substrings themselves. The trick is that if I do so, it's possible I'll be creating slices ALL the time. Is this somet... | how fast is python's slice | 0.039979 | 0 | 0 | 7,845 |
1,288,959 | 2009-08-17T16:19:00.000 | 0 | 1 | 0 | 0 | python,gnupg,pyme,gpgme | 2,618,041 | 2 | true | 0 | 0 | Add "c.set_armor(1)" before you set the passphrase callback. | 1 | 0 | 0 | I am using Pyme to interface with GPGME and have had no problems signing / encrypting. When I try to decrypt, however, it always brings up the prompt for the passphrase despite having set it via a c.set_passphrase_cb callback. Am I doing something wrong? | Python Pyme: Simple decryption without user interaction | 1.2 | 0 | 0 | 1,048 |
1,289,813 | 2009-08-17T19:04:00.000 | 2 | 0 | 1 | 0 | python,multiprocessing | 26,808,887 | 5 | false | 0 | 0 | Just starting the pool takes a long time. I have found in 'real world' programs if I can keep a pool open and reuse it for many different processes,passing the reference down through method calls (usually using map.async) then on Linux I can save a few percent but on Windows I can often halve the time taken. Linux is a... | 3 | 31 | 0 | So I knocked up some test code to see how the multiprocessing module would scale on cpu bound work compared to threading. On linux I get the performance increase that I'd expect:
linux (dual quad core xeon):
serialrun took 1192.319 ms
parallelrun took 346.727 ms
threadedrun took 2108.172 ms
My dual core macbook pro sh... | python multiprocessing vs threading for cpu bound work on windows and linux | 0.07983 | 0 | 0 | 10,563 |
1,289,813 | 2009-08-17T19:04:00.000 | 23 | 0 | 1 | 0 | python,multiprocessing | 1,289,849 | 5 | true | 0 | 0 | Processes are much more lightweight under UNIX variants. Windows processes are heavy and take much more time to start up. Threads are the recommended way of doing multiprocessing on windows. | 3 | 31 | 0 | So I knocked up some test code to see how the multiprocessing module would scale on cpu bound work compared to threading. On linux I get the performance increase that I'd expect:
linux (dual quad core xeon):
serialrun took 1192.319 ms
parallelrun took 346.727 ms
threadedrun took 2108.172 ms
My dual core macbook pro sh... | python multiprocessing vs threading for cpu bound work on windows and linux | 1.2 | 0 | 0 | 10,563 |
1,289,813 | 2009-08-17T19:04:00.000 | 1 | 0 | 1 | 0 | python,multiprocessing | 1,289,977 | 5 | false | 0 | 0 | Currently, your counter() function is not modifying much state. Try changing counter() so that it modifies many pages of memory. Then run a cpu bound loop. See if there is still a large disparity between linux and windows.
I'm not running python 2.6 right now, so I can't try it myself. | 3 | 31 | 0 | So I knocked up some test code to see how the multiprocessing module would scale on cpu bound work compared to threading. On linux I get the performance increase that I'd expect:
linux (dual quad core xeon):
serialrun took 1192.319 ms
parallelrun took 346.727 ms
threadedrun took 2108.172 ms
My dual core macbook pro sh... | python multiprocessing vs threading for cpu bound work on windows and linux | 0.039979 | 0 | 0 | 10,563 |
1,289,941 | 2009-08-17T19:33:00.000 | 0 | 0 | 0 | 0 | c++,python,wt | 1,475,164 | 7 | false | 1 | 1 | Having looked several ones, like django, pylos, web2py, wt. My recommendation is web2py. It's a python version of "ruby on rails" and easy to learn. | 2 | 12 | 0 | I am familiar with both Python and C++ as a programmer. I was thinking of writing my own simple web application and I wanted to know which language would be more appropriate for server-side web development.
Some things I'm looking for:
It has to be intuitive. I recognize that Wt exists and it follows the model of Qt. ... | Web Application Frameworks: C++ vs Python | 0 | 0 | 0 | 10,487 |
1,289,941 | 2009-08-17T19:33:00.000 | 1 | 0 | 0 | 0 | c++,python,wt | 1,290,620 | 7 | false | 1 | 1 | I think you better go firt python in your case, meanwhile you can extend cppCMS functionalities and write your own framework arround it.
wt was a good idea design, but somehow not that suitable. | 2 | 12 | 0 | I am familiar with both Python and C++ as a programmer. I was thinking of writing my own simple web application and I wanted to know which language would be more appropriate for server-side web development.
Some things I'm looking for:
It has to be intuitive. I recognize that Wt exists and it follows the model of Qt. ... | Web Application Frameworks: C++ vs Python | 0.028564 | 0 | 0 | 10,487 |
1,290,030 | 2009-08-17T19:47:00.000 | 5 | 0 | 1 | 0 | python,class,dictionary | 8,500,864 | 6 | false | 0 | 0 | You actually summarize the trade-offs quite well. It seems lots of people get worried far too early about performance. Rather than repeat the standard advice on the subject I'll suggest you search the web for "Knuth premature optimization". The fact of the matter is that for objects of known structure you will be very ... | 4 | 6 | 0 | First, I'd like to point out that I know OOP concepts and understand the differences between dictionaries and classes. My question is about what makes sense design wise in this case:
I am designing a webapp in python and I have to represent something like a book object.
Books have chapters and chapters have titles and ... | python: Overhead to using classes instead of dictionaries? | 0.16514 | 0 | 0 | 2,887 |
1,290,030 | 2009-08-17T19:47:00.000 | 1 | 0 | 1 | 0 | python,class,dictionary | 1,290,102 | 6 | false | 0 | 0 | If you go with objects, I wouldn't store the data pickled in the database simply for the reasons you gave. It would be considerably worse if you underwent a change of language or similar.
FWIW, I would start with a dictionary. If things get complicated or new features are needed, make it an object. | 4 | 6 | 0 | First, I'd like to point out that I know OOP concepts and understand the differences between dictionaries and classes. My question is about what makes sense design wise in this case:
I am designing a webapp in python and I have to represent something like a book object.
Books have chapters and chapters have titles and ... | python: Overhead to using classes instead of dictionaries? | 0.033321 | 0 | 0 | 2,887 |
1,290,030 | 2009-08-17T19:47:00.000 | 4 | 0 | 1 | 0 | python,class,dictionary | 1,290,044 | 6 | false | 0 | 0 | Objects were originally created to bundle data with functionality. If you just want to store data, use dictionaries. If you want to include methods for manipulating the data, use objects. | 4 | 6 | 0 | First, I'd like to point out that I know OOP concepts and understand the differences between dictionaries and classes. My question is about what makes sense design wise in this case:
I am designing a webapp in python and I have to represent something like a book object.
Books have chapters and chapters have titles and ... | python: Overhead to using classes instead of dictionaries? | 0.132549 | 0 | 0 | 2,887 |
1,290,030 | 2009-08-17T19:47:00.000 | 8 | 0 | 1 | 0 | python,class,dictionary | 1,290,060 | 6 | false | 0 | 0 | A few thoughts:
If you start with a dictionary, you can always switch to a custom class later that implements the mapping protocol (or subclasses dict). So it's probably a good starting point.
You can define custom Python objects to use __slots__, which will be faster and more memory efficient if you have a large num... | 4 | 6 | 0 | First, I'd like to point out that I know OOP concepts and understand the differences between dictionaries and classes. My question is about what makes sense design wise in this case:
I am designing a webapp in python and I have to represent something like a book object.
Books have chapters and chapters have titles and ... | python: Overhead to using classes instead of dictionaries? | 1 | 0 | 0 | 2,887 |
1,290,470 | 2009-08-17T21:10:00.000 | 3 | 0 | 0 | 0 | python,django,django-admin | 1,330,208 | 2 | false | 1 | 0 | There's no such functionality built in, but I don't think it would be hard to create your own AdminInline subclass (and an accompanying template for it) that would do this. Just model it off TabularInline, but display fields' data directly instead of rendering form fields. | 1 | 7 | 0 | I can edit a parent child relationship using the TablularInline and StackedInline classes, however I would prefer to list the child relationships as a change list as there is a lot of information and the forms are too big. Is there an inline change list available in DJango admin or a way or creating one? | Django Admin Inline Change List | 0.291313 | 0 | 0 | 2,622 |
1,290,779 | 2009-08-17T22:13:00.000 | 0 | 0 | 1 | 0 | python,geometry | 1,290,858 | 3 | false | 0 | 0 | First, find the distance from the point to the line. If the distance from the point to the line is zero, then it's on the line. | 1 | 1 | 0 | Is there a nice way to determine if a point lies within a 3D line segment?
I know there are algorithms that determine the distance between a point and line segment, but I'm wondering if there's something more compact or efficient. | IsPointInsideSegment(pt, line) in Python | 0 | 0 | 0 | 885 |
1,291,755 | 2009-08-18T04:10:00.000 | 2 | 0 | 0 | 0 | python,django,wsgi | 1,291,769 | 13 | false | 1 | 0 | settings.DEBUG could be True and running under Apache or some other non-development server. It will still run. As far as I can tell, there is nothing in the run-time environment short of examining the pid and comparing to pids in the OS that will give you this information. | 1 | 59 | 0 | How can I be certain that my application is running on development server or not? I suppose I could check value of settings.DEBUG and assume if DEBUG is True then it's running on development server, but I'd prefer to know for sure than relying on convention. | How can I tell whether my Django application is running on development server or not? | 0.03076 | 0 | 0 | 26,741 |
1,291,991 | 2009-08-18T05:37:00.000 | 5 | 0 | 0 | 0 | wxpython,resize,wxwidgets,frame,aspect-ratio | 1,292,083 | 2 | true | 0 | 1 | Sizers cannot be applied to top-level windows (in order to define properties of the windows themselves as opposed to their contents), so unfortunately there is no "true" way to lock in the aspect ratio. Your best bet would be to catch your window's OnSize event, get the size that the user wants the window to be (which ... | 1 | 2 | 0 | I have a wx.Frame that has only a single child. While setting up the child's wx.Sizer, I can use the wx.SHAPED flag, which keeps the aspect ratio of the child locked. However, the Frame still has complete freedom in it's aspect ratio, and will leave a blank space in the area that is left unused by the child.
How can I ... | wxwidgets/wxPython: Resizing a wxFrame while keeping aspect ratio | 1.2 | 0 | 0 | 5,993 |
1,292,817 | 2009-08-18T09:23:00.000 | 19 | 0 | 0 | 0 | python,browser-automation | 3,486,971 | 15 | false | 0 | 0 | selenium will do exactly what you want and it handles javascript | 3 | 29 | 0 | suppose, I need to perform a set of procedure on a particular website
say, fill some forms, click submit button, send the data back to server, receive the response, again do something based on the response and send the data back to the server of the website.
I know there is a webbrowser module in python, but I want to ... | How to automate browsing using python? | 1 | 0 | 1 | 108,234 |
1,292,817 | 2009-08-18T09:23:00.000 | 1 | 0 | 0 | 0 | python,browser-automation | 20,679,640 | 15 | false | 0 | 0 | The best solution that i have found (and currently implementing) is :
- scripts in python using selenium webdriver
- PhantomJS headless browser (if firefox is used you will have a GUI and will be slower) | 3 | 29 | 0 | suppose, I need to perform a set of procedure on a particular website
say, fill some forms, click submit button, send the data back to server, receive the response, again do something based on the response and send the data back to the server of the website.
I know there is a webbrowser module in python, but I want to ... | How to automate browsing using python? | 0.013333 | 0 | 1 | 108,234 |
1,292,817 | 2009-08-18T09:23:00.000 | 0 | 0 | 0 | 0 | python,browser-automation | 3,988,708 | 15 | false | 0 | 0 | httplib2 + beautifulsoup
Use firefox + firebug + httpreplay to see what the javascript passes to and from the browser from the website. Using httplib2 you can essentially do the same via post and get | 3 | 29 | 0 | suppose, I need to perform a set of procedure on a particular website
say, fill some forms, click submit button, send the data back to server, receive the response, again do something based on the response and send the data back to the server of the website.
I know there is a webbrowser module in python, but I want to ... | How to automate browsing using python? | 0 | 0 | 1 | 108,234 |
1,292,931 | 2009-08-18T09:56:00.000 | 0 | 0 | 1 | 0 | python,eclipse,ide | 5,147,647 | 2 | true | 0 | 0 | WingIDE 4 now has support for refactoring. | 1 | 3 | 0 | I am just transitioning from Eclipse to Wing IDE for my Python code. In Eclipse I had an option to "rename" objects. I could take any object defined in my code, it could be a variable or a function or a method or whatever, and I could rename it automatically in all the files that referenced it.
Is there a similar featu... | Renaming objects with Wing IDE | 1.2 | 0 | 0 | 395 |
1,293,518 | 2009-08-18T12:28:00.000 | 2 | 0 | 0 | 0 | python,proxy,ftp,ftplib | 1,293,579 | 6 | false | 0 | 0 | Standard module ftplib doesn't support proxies. It seems the only solution is to write your own customized version of the ftplib. | 1 | 9 | 0 | I'm developing an FTP client in Python ftplib. How do I add proxies support to it (most FTP apps I have seen seem to have it)? I'm especially thinking about SOCKS proxies, but also other types... FTP, HTTP (is it even possible to use HTTP proxies with FTP program?)
Any ideas how to do it? | Proxies in Python FTP application | 0.066568 | 0 | 1 | 18,202 |
1,294,382 | 2009-08-18T14:50:00.000 | 16 | 0 | 1 | 0 | python,python-internals,gil | 1,294,430 | 8 | false | 0 | 0 | Whenever two threads have access to the same variable you have a problem.
In C++ for instance, the way to avoid the problem is to define some mutex lock to prevent two thread to, let's say, enter the setter of an object at the same time.
Multithreading is possible in python, but two threads cannot be executed at the sa... | 2 | 265 | 0 | What is a global interpreter lock and why is it an issue?
A lot of noise has been made around removing the GIL from Python, and I'd like to understand why that is so important. I have never written a compiler nor an interpreter myself, so don't be frugal with details, I'll probably need them to understand. | What is the global interpreter lock (GIL) in CPython? | 1 | 0 | 0 | 72,549 |
1,294,382 | 2009-08-18T14:50:00.000 | 63 | 0 | 1 | 0 | python,python-internals,gil | 1,294,398 | 8 | false | 0 | 0 | Suppose you have multiple threads which don't really touch each other's data. Those should execute as independently as possible. If you have a "global lock" which you need to acquire in order to (say) call a function, that can end up as a bottleneck. You can wind up not getting much benefit from having multiple threads... | 2 | 265 | 0 | What is a global interpreter lock and why is it an issue?
A lot of noise has been made around removing the GIL from Python, and I'd like to understand why that is so important. I have never written a compiler nor an interpreter myself, so don't be frugal with details, I'll probably need them to understand. | What is the global interpreter lock (GIL) in CPython? | 1 | 0 | 0 | 72,549 |
1,294,385 | 2009-08-18T14:50:00.000 | 0 | 0 | 0 | 0 | python,mysql,file-io,blob | 1,294,488 | 2 | false | 0 | 0 | You can insert and read BLOBs from a DB like every other column type. From the database API's view there is nothing special about BLOBs. | 1 | 15 | 0 | I want to write a python script that populates a database with some information. One of the columns in my table is a BLOB that I would like to save a file to for each entry.
How can I read the file (binary) and insert it into the DB using python? Likewise, how can I retrieve it and write that file back to some arbitr... | How to insert / retrieve a file stored as a BLOB in a MySQL db using python | 0 | 1 | 0 | 25,537 |
1,294,618 | 2009-08-18T15:25:00.000 | 3 | 0 | 0 | 1 | python,google-app-engine,registration | 1,294,678 | 1 | false | 1 | 0 | Call or write to Google! Google's policies are very exact and very strict, because they are catering to thousands of developers, and thus need those standards and uniformity. But if you have a good reason for needing more than 10, and you can get a real person at the end of a telephone line, I'd think you'd have a good... | 1 | 14 | 0 | Anyone knows any "legal" way to surpass the 10-app-limit Google imposes?
I wouldn't mind to pay, or anything, but I wasn't able to find a way to have more
than 10 apps and can't either remove one. | how to register more than 10 apps in Google App Engine | 0.53705 | 0 | 0 | 1,877 |
1,296,162 | 2009-08-18T20:02:00.000 | 3 | 0 | 0 | 0 | python,c | 1,296,188 | 3 | false | 0 | 0 | You can embed a Python interpreter in a C program, but I think that the easiest solution is to write a Python script that converts "pickles" in another format, e.g. an SQLite database. | 1 | 23 | 0 | I am working on integrating with several music players. At the moment my favorite is exaile.
In the new version they are migrating the database format from SQLite3 to an internal Pickle format. I wanted to know if there is a way to access pickle format files without having to reverse engineer the format by hand.
I know... | How can I read a python pickle database/file from C? | 0.197375 | 1 | 0 | 27,544 |
1,296,446 | 2009-08-18T20:52:00.000 | 1 | 1 | 0 | 0 | python,email,gmail,imap,pop3 | 1,296,476 | 4 | false | 0 | 0 | Just go to the Gmail web interface, do an advanced search by date, then select all and mark as read. | 2 | 5 | 0 | Long story short, I created a new gmail account, and linked several other accounts to it (each with 1000s of messages), which I am importing. All imported messages arrive as unread, but I need them to appear as read.
I have a little experience with python, but I've only used mail and imaplib modules for sending mail, n... | Parse Gmail with Python and mark all older than date as "read" | 0.049958 | 0 | 1 | 5,833 |
1,296,446 | 2009-08-18T20:52:00.000 | 1 | 1 | 0 | 0 | python,email,gmail,imap,pop3 | 1,296,465 | 4 | false | 0 | 0 | Rather than try to parse our HTML why not just use the IMAP interface? Hook it up to a standard mail client and then just sort by date and mark whichever ones you want as read. | 2 | 5 | 0 | Long story short, I created a new gmail account, and linked several other accounts to it (each with 1000s of messages), which I am importing. All imported messages arrive as unread, but I need them to appear as read.
I have a little experience with python, but I've only used mail and imaplib modules for sending mail, n... | Parse Gmail with Python and mark all older than date as "read" | 0.049958 | 0 | 1 | 5,833 |
1,296,640 | 2009-08-18T21:32:00.000 | 3 | 0 | 1 | 0 | python,ironpython | 1,296,734 | 4 | false | 0 | 0 | You can use the Python standard library from IronPython just fine. Here's how:
Install Python.
Setup an environment variable named IRONPYTHONPATH that points to the standard library directory.
Next time ipy.exe is run, site.py is read and you're good to go. | 1 | 6 | 0 | I tried IronPython some time ago and it seemed that it implements only python language, and uses .NET for libraries. Is this still the case? Can one use python modules from IronPython? | Does IronPython implement python standard library? | 0.148885 | 0 | 0 | 3,559 |
1,298,020 | 2009-08-19T06:01:00.000 | 2 | 0 | 1 | 0 | php,python,ruby,ide,smalltalk | 22,278,806 | 6 | false | 0 | 0 | OK so this is ancient-but I simply can't believe no one thought of opening several browsers. I don't think I've ever seen anyone programming in a Smalltalk system with just the one. Class browsers, hierarchy browsers, protocol browsers... Yes, each one shows a single methods source at any one time but just point each o... | 4 | 4 | 0 | I'm working on an IDE for python, ruby and php.
Never having used Smallltalk myself (even it was very popular when I was at university) I wonder if the classic Smalltalk Browser which displays only one method is really an improvment or to classical file editing or not.
I myself like to have the overview of as much as ... | How useful would be a Smalltalk source code browser for other programming languages? | 0.066568 | 0 | 0 | 1,422 |
1,298,020 | 2009-08-19T06:01:00.000 | 3 | 0 | 1 | 0 | php,python,ruby,ide,smalltalk | 1,334,764 | 6 | false | 0 | 0 | Eclipse offers a Smalltalk like browser, the Java browsing perspective. Even though being a Smalltalker myself, I almost never use it. Why? The powerful part if the Smalltalk IDE is the debugger not the browser. When coding Smalltalk, I do everything test-first and then fix all missing methods in the debugger while run... | 4 | 4 | 0 | I'm working on an IDE for python, ruby and php.
Never having used Smallltalk myself (even it was very popular when I was at university) I wonder if the classic Smalltalk Browser which displays only one method is really an improvment or to classical file editing or not.
I myself like to have the overview of as much as ... | How useful would be a Smalltalk source code browser for other programming languages? | 0.099668 | 0 | 0 | 1,422 |
1,298,020 | 2009-08-19T06:01:00.000 | 0 | 0 | 1 | 0 | php,python,ruby,ide,smalltalk | 1,298,447 | 6 | false | 0 | 0 | I have a love/hate relationship with the Smalltalk browsers (Squeak in my case). At times I think they are the best things since sliced bread, and at others they make me grind my teeth. The problem with Smalltalk is that the browsers are basically all you have. You can of course write your own, but very few people go t... | 4 | 4 | 0 | I'm working on an IDE for python, ruby and php.
Never having used Smallltalk myself (even it was very popular when I was at university) I wonder if the classic Smalltalk Browser which displays only one method is really an improvment or to classical file editing or not.
I myself like to have the overview of as much as ... | How useful would be a Smalltalk source code browser for other programming languages? | 0 | 0 | 0 | 1,422 |
1,298,020 | 2009-08-19T06:01:00.000 | 2 | 0 | 1 | 0 | php,python,ruby,ide,smalltalk | 1,302,807 | 6 | false | 0 | 0 | VisualAge for Java used the Smalltalk Browser model for coding, and I thought they (IBM) did a great job of taking a typical file based language and lifting it up to a higher conceptual mode. Instantiations even had a great add-on to bring good refactoring tools to VAJ (people either don't know or forget for which lan... | 4 | 4 | 0 | I'm working on an IDE for python, ruby and php.
Never having used Smallltalk myself (even it was very popular when I was at university) I wonder if the classic Smalltalk Browser which displays only one method is really an improvment or to classical file editing or not.
I myself like to have the overview of as much as ... | How useful would be a Smalltalk source code browser for other programming languages? | 0.066568 | 0 | 0 | 1,422 |
1,298,037 | 2009-08-19T06:07:00.000 | 1 | 0 | 1 | 0 | python,shelve,temporary-files | 1,298,162 | 1 | true | 0 | 0 | I would rather inherit from shelve.Shelf, and override the close method (*) to unlink the files. Notice that, depending on the specific dbm module being used, you may have more than one file that contains the shelf. One solution could be to create a temporary directory, rather than a temporary file, and remove anything... | 1 | 1 | 0 | Basically, I want an infinite size (more accurately, hard-drive rather than memory bound) dict in a python program I'm writing. It seems like the tempfile and shelve modules are naturally suited for this, however, I can't see how to use them together in a safe manner. I want the tempfile to be deleted when the shelve i... | Is there an easy way to use a python tempfile in a shelve (and make sure it cleans itself up)? | 1.2 | 0 | 0 | 606 |
1,299,018 | 2009-08-19T10:32:00.000 | 0 | 0 | 1 | 1 | java,python,installation | 1,299,061 | 5 | false | 0 | 0 | exec(String command)
Executes the specified string command in a separate process.
Check for Python from command | 3 | 3 | 0 | How can I check from inside a java program if python is installed in windows?
Python does not add its path to the system Path and no assumption is to be made about the probable path of installation(i.e it can be installed anywhere). | How to check if python is installed in windows from java? | 0 | 0 | 0 | 13,675 |
1,299,018 | 2009-08-19T10:32:00.000 | 2 | 0 | 1 | 1 | java,python,installation | 1,299,062 | 5 | true | 0 | 0 | Use the Java Runtime to exec the following command "python --version".
If it works, you have Python, and the standard output is the version number.
If it doesn't work, you don't have Python. | 3 | 3 | 0 | How can I check from inside a java program if python is installed in windows?
Python does not add its path to the system Path and no assumption is to be made about the probable path of installation(i.e it can be installed anywhere). | How to check if python is installed in windows from java? | 1.2 | 0 | 0 | 13,675 |
1,299,018 | 2009-08-19T10:32:00.000 | -2 | 0 | 1 | 1 | java,python,installation | 19,837,856 | 5 | false | 0 | 0 | this would work
Process process = Runtime.getRuntime().exec("cmd /c
C:\Python27\python --version"); | 3 | 3 | 0 | How can I check from inside a java program if python is installed in windows?
Python does not add its path to the system Path and no assumption is to be made about the probable path of installation(i.e it can be installed anywhere). | How to check if python is installed in windows from java? | -0.07983 | 0 | 0 | 13,675 |
1,300,213 | 2009-08-19T14:09:00.000 | 0 | 0 | 0 | 0 | python,django,postgresql,apache2,mod-wsgi | 2,368,542 | 2 | true | 1 | 0 | Found it! I'm using eventlet in some other code and I imported one of my modules into a django model. So eventlet was taking over and putting everything to "sleep". | 1 | 1 | 0 | I'm running Django through mod_wsgi and Apache (2.2.8) on Ubuntu 8.04.
I've been running Django on this setup for about 6 months without any problems. Yesterday, I moved my database (postgres 8.3) to its own server, and my Django site started refusing to load (the browser spinner would just keep spinning).
It works fo... | Apache/Django freezing after a few requests | 1.2 | 1 | 0 | 435 |
1,300,265 | 2009-08-19T14:15:00.000 | 7 | 1 | 1 | 0 | c#,static,ironpython,dynamic-language-runtime | 1,301,404 | 1 | true | 0 | 0 | You can do:
scope.SetVariable("math", DynamicHelpers.GetPythonTypeFromType(typeof(System.Math)));
DynamicHelpers is in IronPython.Runtime.Types. | 1 | 5 | 0 | scope.SetVariable("math", ?? typeof(System.Math) ??);
or do I need create a module? | How to import static class (or static method) into IronPython (or DLR) using C# code(not python)? | 1.2 | 0 | 0 | 1,921 |
1,300,610 | 2009-08-19T15:14:00.000 | 2 | 0 | 1 | 0 | php,python,substr | 1,300,675 | 3 | false | 0 | 0 | Python distinguishes between strings and numbers (and actually also between numbers of different kinds, i.e., int vs float) so the best solution depends on what type you start with (str or int?) and what type you want as a result (ditto).
Int to int: abs(x) % 10
Int to str: str(x)[-1]
Str to int: int(x[-1])
Str to str:... | 1 | 1 | 0 | I need to be able to get the last digit of a number.
i.e., I need 2 to be returned from: 12.
Like this in PHP: $minute = substr(date('i'), -1) but I need this in Python.
Any ideas | Python - substr | 0.132549 | 0 | 0 | 2,917 |
1,301,000 | 2009-08-19T16:08:00.000 | 0 | 0 | 0 | 0 | python,sqlalchemy,mod-python | 1,301,029 | 2 | true | 1 | 0 | Not that I've ever heard of, but it's impossible to tell without some code to look at.
Maybe you initialised your result set list as a global, or shared member, and then appended results to it when the application was called without resetting it to empty? A classic way of re-using lists accidentally is to put one in a ... | 1 | 0 | 0 | I have been working on a website using mod_python, python, and SQL Alchemy when I ran into a strange problem: When I query the database for all of the records, it returns the correct result set; however, when I refresh the page, it returns me a result set with that same result set appended to it. I get more result sets... | mod_python problem? | 1.2 | 1 | 0 | 192 |
1,301,346 | 2009-08-19T17:11:00.000 | 4 | 0 | 1 | 0 | python,oop,naming-conventions,identifier | 1,301,456 | 17 | false | 0 | 0 | Your question is good, it is not only about methods. Functions and objects in modules are commonly prefixed with one underscore as well, and can be prefixed by two.
But __double_underscore names are not name-mangled in modules, for example. What happens is that names beginning with one (or more) underscores are not imp... | 2 | 1,637 | 0 | Can someone please explain the exact meaning of having single and double leading underscores before an object's name in Python, and the difference between both?
Also, does that meaning stay the same regardless of whether the object in question is a variable, a function, a method, etc.? | What is the meaning of single and double underscore before an object name? | 0.047024 | 0 | 0 | 597,074 |
1,301,346 | 2009-08-19T17:11:00.000 | 415 | 0 | 1 | 0 | python,oop,naming-conventions,identifier | 1,301,409 | 17 | false | 0 | 0 | __foo__: this is just a convention, a way for the Python system to use names that won't conflict with user names.
_foo: this is just a convention, a way for the programmer to indicate that the variable is private (whatever that means in Python).
__foo: this has real meaning: the interpreter replaces this name with _cla... | 2 | 1,637 | 0 | Can someone please explain the exact meaning of having single and double leading underscores before an object's name in Python, and the difference between both?
Also, does that meaning stay the same regardless of whether the object in question is a variable, a function, a method, etc.? | What is the meaning of single and double underscore before an object name? | 1 | 0 | 0 | 597,074 |
1,301,352 | 2009-08-19T17:12:00.000 | 2 | 0 | 1 | 0 | python,shell,vi | 1,301,501 | 10 | false | 0 | 0 | When working with Vim on the console, I have found that using "tabs" in Vim, instead of having multiple Vim instances suspended in the background, makes handling multiple files in Vim more efficient. It takes a bit of getting used to, but it works really well. | 2 | 17 | 0 | This may sound strange, but I need a better way to build python scripts than opening a file with nano/vi, change something, quit the editor, and type in python script.py, over and over again.
I need to build the script on a webserver without any gui. Any ideas how can I improve my workflow? | Python IDE on Linux Console | 0.039979 | 0 | 0 | 30,862 |
1,301,352 | 2009-08-19T17:12:00.000 | 5 | 0 | 1 | 0 | python,shell,vi | 1,301,418 | 10 | false | 0 | 0 | Using emacs with python-mode you can execute the script with C-c C-c | 2 | 17 | 0 | This may sound strange, but I need a better way to build python scripts than opening a file with nano/vi, change something, quit the editor, and type in python script.py, over and over again.
I need to build the script on a webserver without any gui. Any ideas how can I improve my workflow? | Python IDE on Linux Console | 0.099668 | 0 | 0 | 30,862 |
1,301,887 | 2009-08-19T18:44:00.000 | 25 | 0 | 0 | 1 | python,django,macos,shell,terminal | 2,623,452 | 3 | false | 1 | 0 | Maybe this is because there was an error while running Django. Sometimes it happens that the std input disappears because stty was used. You can manually hide your input by typing:
$ stty -echo
Now you won't see what you typed. To restore this and solve your problem just type
$ stty echo
This could help. | 2 | 11 | 0 | I'm confused by some behavior of my Mac OS X Terminal and my Django manage.py shell and pdb.
When I start a new terminal, the Standard Input is displayed as I type. However, if there is an error, suddenly Standard Input does not appear on the screen. This error continues until I shut down that terminal window.
The Inpu... | Why is Standard Input is not displayed as I type in Mac OS X Terminal application? | 1 | 0 | 0 | 2,868 |
1,301,887 | 2009-08-19T18:44:00.000 | 3 | 0 | 0 | 1 | python,django,macos,shell,terminal | 2,018,573 | 3 | false | 1 | 0 | If you exit pdb you can type reset and standard input echo will return. I'm not sure if you can execute something similar within pdb. It will erase what is currently displayed however. | 2 | 11 | 0 | I'm confused by some behavior of my Mac OS X Terminal and my Django manage.py shell and pdb.
When I start a new terminal, the Standard Input is displayed as I type. However, if there is an error, suddenly Standard Input does not appear on the screen. This error continues until I shut down that terminal window.
The Inpu... | Why is Standard Input is not displayed as I type in Mac OS X Terminal application? | 0.197375 | 0 | 0 | 2,868 |
1,302,057 | 2009-08-19T19:13:00.000 | 3 | 0 | 0 | 0 | c#,python,string,uniqueidentifier,uuid | 1,302,155 | 5 | false | 1 | 0 | If you are using MS-SQL you should probably just use the uniqueindentifier datatype, it is both compact (16 bytes) and since the SQL engine knows about it it can optimize indexes and queries using it. | 3 | 9 | 0 | I need to generate unique record id for the given unique string.
I tried using uuid format which seems to be good.
But we feel that is lengthly.
so we need to cutdown the uuid string 9f218a38-12cd-5942-b877-80adc0589315 to smaller. By removing '-' we can save 4 chars. What is the safest part to remove from uuid? We ... | cutdown uuid further to make short string | 0.119427 | 0 | 0 | 9,264 |
1,302,057 | 2009-08-19T19:13:00.000 | 2 | 0 | 0 | 0 | c#,python,string,uniqueidentifier,uuid | 1,302,532 | 5 | false | 1 | 0 | An UUID provides (almost) 128 bits of uniqueness. You may shorten it to 16 binary bytes, or 22 base64-encoded characters. I wouldn't recommend removing any part of a UUID, otherwise, it just loses its sense. UUIDs were designed so that all the 128 bits have meaning. If you want less than that, you should use some other... | 3 | 9 | 0 | I need to generate unique record id for the given unique string.
I tried using uuid format which seems to be good.
But we feel that is lengthly.
so we need to cutdown the uuid string 9f218a38-12cd-5942-b877-80adc0589315 to smaller. By removing '-' we can save 4 chars. What is the safest part to remove from uuid? We ... | cutdown uuid further to make short string | 0.07983 | 0 | 0 | 9,264 |
1,302,057 | 2009-08-19T19:13:00.000 | 2 | 0 | 0 | 0 | c#,python,string,uniqueidentifier,uuid | 1,302,665 | 5 | false | 1 | 0 | The UUID is 128 bits or 16 bytes. With no encoding, you could get it as low as 16 bytes. UUIDs are commonly written in hexadecimal, making them 32 byte readable strings. With other encodings, you get different results:
base-64 turns 3 8-bit bytes into 4 6-bit characters, so 16 bytes of data becomes 22 characters long
... | 3 | 9 | 0 | I need to generate unique record id for the given unique string.
I tried using uuid format which seems to be good.
But we feel that is lengthly.
so we need to cutdown the uuid string 9f218a38-12cd-5942-b877-80adc0589315 to smaller. By removing '-' we can save 4 chars. What is the safest part to remove from uuid? We ... | cutdown uuid further to make short string | 0.07983 | 0 | 0 | 9,264 |
1,303,270 | 2009-08-20T00:00:00.000 | 1 | 0 | 1 | 0 | php,python,web-applications,lua | 2,008,551 | 6 | false | 1 | 0 | If it's only the language, then I agree with Norman. If the web development framework is important to you, then you have to consider Ruby because RoR is a very mature framework. I love Python, but there seems to be quite a few frameworks to choose from, none of them is dominant. CherryPy, Django, Pylons, web2py, Zope 2... | 2 | 7 | 0 | I'm about to begin my next web development project and wanted to hear about the merits of Lua within the web-development space.
How does Lua compare to PHP/Python/JSP/etc.. for web development?
Any reason why Lua would be a poor choice for a web application language vs the others? | Lua vs PHP/Python/JSP/etc | 0.033321 | 0 | 0 | 11,188 |
1,303,270 | 2009-08-20T00:00:00.000 | 7 | 0 | 1 | 0 | php,python,web-applications,lua | 1,303,300 | 6 | false | 1 | 0 | Using Lua for web development is pretty rare...you could do it, but it will be a lot more time consuming than using a language that has matured as a web developing language (PHP) or has good web related libraries (python/ruby/etc.) If you do go with Lua, this means you may end up "recreating the wheel" a lot for what ... | 2 | 7 | 0 | I'm about to begin my next web development project and wanted to hear about the merits of Lua within the web-development space.
How does Lua compare to PHP/Python/JSP/etc.. for web development?
Any reason why Lua would be a poor choice for a web application language vs the others? | Lua vs PHP/Python/JSP/etc | 1 | 0 | 0 | 11,188 |
1,303,307 | 2009-08-20T00:14:00.000 | 2 | 0 | 0 | 0 | python,image,graphics,audio,fft | 9,714,655 | 4 | false | 0 | 0 | If you need to convert from PCM format to integers, you'll want to use struct.unpack. | 1 | 27 | 0 | How would I go about using Python to read the frequency peaks from a WAV PCM file and then be able to generate an image of it, for spectogram analysis?
I'm trying to make a program that allows you to read any audio file, converting it to WAV PCM, and then finding the peaks and frequency cutoffs. | FFT for Spectrograms in Python | 0.099668 | 0 | 0 | 35,268 |
1,303,654 | 2009-08-20T02:26:00.000 | 111 | 0 | 0 | 0 | python,database,django,multithreading,transactions | 1,346,401 | 1 | true | 1 | 0 | After weeks of testing and reading the Django source code, I've found the answer to my own question:
Transactions
Django's default autocommit behavior still holds true for my threaded function. However, it states in the Django docs:
As soon as you perform an action that needs to write to the database, Django produces ... | 1 | 59 | 0 | I've got Django set up to run some recurring tasks in their own threads, and I noticed that they were always leaving behind unfinished database connection processes (pgsql "Idle In Transaction").
I looked through the Postgres logs and found that the transactions weren't being completed (no ROLLBACK). I tried using the ... | Threaded Django task doesn't automatically handle transactions or db connections? | 1.2 | 1 | 0 | 10,095 |
1,304,593 | 2009-08-20T07:45:00.000 | 0 | 1 | 0 | 0 | python,logging,handler | 1,304,622 | 2 | false | 0 | 0 | You probably need to do both. To figure this out, I suggest to install a local mail server and use that. This way, you can shut it down while your script runs and note down the error message.
To keep the code maintainable, you should extends SMTPHandler in such a way that you can handle the exceptions in a single place... | 1 | 1 | 0 | I have setup the logging module for my new python script. I have two handlers, one sending stuff to a file, and one for email alerts. The SMTPHandler is setup to mail anything at the ERROR level or above.
Everything works great, unless the SMTP connection fails. If the SMTP server does not respond or authentication ... | Python logging SMTPHandler - handling offline SMTP server | 0 | 0 | 1 | 1,574 |
1,304,608 | 2009-08-20T07:50:00.000 | 0 | 0 | 0 | 0 | python,django,django-models | 1,304,634 | 2 | false | 1 | 0 | One way to do this would be to break the Item model up into the parts that are individually assignable to a user. If you have fixed user types (admin, customer, team etc.) who can always see the same set of fields, these parts would be whole groups of fields. If it's very dynamic and you want to be able to set up indiv... | 1 | 0 | 0 | I have a model containing items, which has many different fields. There is another model which assigns a set of this field to each user using a m2m-relation.
I want to achieve, that in the end, every user has access to a defined set of fields of the item model, and he only sees these field in views, he can only edit th... | User-specific model in Django | 0 | 0 | 0 | 282 |
1,304,638 | 2009-08-20T07:59:00.000 | 0 | 0 | 1 | 0 | python | 1,304,651 | 1 | true | 0 | 0 | setuptools doesn't quite work on Python 3.1 yet. Try installing packages with regular distutils, or use binary packages (.exe, .msi) provided by the package author. | 1 | 1 | 0 | I've tried to install pip on windows, but it's not working:
giving me ImportError: No module named pkg_resources
easy_install doesn't have version 3.1 or so, just 2.5, and should be replaced by pim.
is there easy way to install it on windows? | how to install new packages with python 3.1.1? | 1.2 | 0 | 0 | 540 |
1,305,182 | 2009-08-20T10:13:00.000 | 0 | 0 | 0 | 0 | python,django | 37,114,696 | 2 | false | 1 | 0 | You can use Django authenticaion system to create users and giving them permissions to modify the data. | 1 | 0 | 0 | I have a question regarding editing/saving data in database using Django.
I have template that show data from database. And after each record i have link that link you to edit page.
But now is the question how to edit data in db without using admin panel?
I run thought tutorial in djangobook but i didn't see how to ac... | Django - Edit data in db | 0 | 0 | 0 | 525 |
1,307,014 | 2009-08-20T15:34:00.000 | 15 | 0 | 1 | 0 | python,string,unicode,conventions | 1,307,177 | 6 | false | 0 | 0 | With the world getting smaller, chances are that any string you encounter will contain Unicode eventually. So for any new apps, you should at least provide __unicode__(). Whether you also override __str__() is then just a matter of taste. | 2 | 224 | 0 | Is there a python convention for when you should implement __str__() versus __unicode__(). I've seen classes override __unicode__() more frequently than __str__() but it doesn't appear to be consistent. Are there specific rules when it is better to implement one versus the other? Is it necessary/good practice to imp... | Python __str__ versus __unicode__ | 1 | 0 | 0 | 69,908 |
1,307,014 | 2009-08-20T15:34:00.000 | 24 | 0 | 1 | 0 | python,string,unicode,conventions | 1,307,209 | 6 | false | 0 | 0 | If I didn't especially care about micro-optimizing stringification for a given class I'd always implement __unicode__ only, as it's more general. When I do care about such minute performance issues (which is the exception, not the rule), having __str__ only (when I can prove there never will be non-ASCII characters in ... | 2 | 224 | 0 | Is there a python convention for when you should implement __str__() versus __unicode__(). I've seen classes override __unicode__() more frequently than __str__() but it doesn't appear to be consistent. Are there specific rules when it is better to implement one versus the other? Is it necessary/good practice to imp... | Python __str__ versus __unicode__ | 1 | 0 | 0 | 69,908 |
1,307,322 | 2009-08-20T16:21:00.000 | 1 | 0 | 0 | 0 | python,iphone,arrays,google-app-engine,app-store | 1,307,656 | 1 | true | 1 | 0 | Unfortunately the only API that seems to be around for Apple's app store is a commercial offering from ABTO; nobody seems to have developed a free one. I'm afraid you'll have to resort to "screen scraping" -- urlget things, use beautifulsoup or the like for interpreting the HTML you get, and be ready to fix breakages w... | 1 | 0 | 0 | I'd like to know how to pragmatically pull lists of apps from the iphone app store. I'd code this in python (via the google app engine) or in an iphone app. My goal would be to select maybe 5 of them and present them to the user. (for instance a top 5 kind of thing, or advanced filtering or queries) | How do I programmatically pull lists/arrays of (itunes urls to) apps in the iphone app store? | 1.2 | 0 | 0 | 151 |
1,308,038 | 2009-08-20T18:36:00.000 | 4 | 0 | 0 | 0 | python,mysql | 1,308,060 | 5 | true | 0 | 0 | There's almost certainly something in either your query, your table definition, or an ORM you're using that thinks the column is numeric and is converting the results to integers. You'll have to define the column as a string (everywhere!) if you want to preserve leading zeroes.
Edit: ZEROFILL on the server isn't going... | 1 | 1 | 0 | When using Python and doing a Select statement to MYSQL to select 09 from a column the zero gets dropped and only the 9 gets printed.
Is there any way to pull all of the number i.e. including the leading zero? | Python - MYSQL - Select leading zeros | 1.2 | 1 | 0 | 1,789 |
1,308,376 | 2009-08-20T19:39:00.000 | 2 | 0 | 0 | 1 | python,google-app-engine,sqlalchemy,orm | 11,325,656 | 2 | false | 1 | 0 | Nowadays they do since Google has launched Cloud SQL | 1 | 11 | 0 | I'd like to use the Python version of App Engine but rather than write my code specifically for the Google Data Store, I'd like to create my models with a generic Python ORM that could be attached to Big Table, or, if I prefer, a regular database at some later time. Is there any Python ORM such as SQLAlchemy that would... | Do any Python ORMs (SQLAlchemy?) work with Google App Engine? | 0.197375 | 1 | 0 | 5,333 |
1,308,710 | 2009-08-20T20:45:00.000 | 2 | 0 | 0 | 0 | python,python-imaging-library,reportlab | 28,385,327 | 3 | false | 0 | 1 | I've found that mask='auto' has stopped working for me with reportlab 3.1.8. In the docs it says to pass the values that you want masked out. So what works for me now is mask=[0, 2, 0, 2, 0, 2, ]. Basically it looks like this `mask=[red_start, red_end, green_start, green_end, blue_start, blue_end, ]
The mask parameter... | 2 | 29 | 0 | I have two PNGs that I am trying to combine into a PDF using ReportLab 2.3 on Python 2.5. When I use canvas.drawImage(ImageReader) to write either PNG onto the canvas and save, the transparency comes out black. If I use PIL (1.1.6) to generate a new Image, then paste() either PNG onto the PIL Image, it composits just... | Transparency in PNGs with reportlab 2.3 | 0.132549 | 0 | 0 | 11,462 |
1,308,710 | 2009-08-20T20:45:00.000 | 1 | 0 | 0 | 0 | python,python-imaging-library,reportlab | 1,311,056 | 3 | false | 0 | 1 | ReportLab uses PIL for managing images. Currently, PIL trunk has patch applied to support transparent PNGs, but you will have to wait for a 1.1.6 release if you need stable package. | 2 | 29 | 0 | I have two PNGs that I am trying to combine into a PDF using ReportLab 2.3 on Python 2.5. When I use canvas.drawImage(ImageReader) to write either PNG onto the canvas and save, the transparency comes out black. If I use PIL (1.1.6) to generate a new Image, then paste() either PNG onto the PIL Image, it composits just... | Transparency in PNGs with reportlab 2.3 | 0.066568 | 0 | 0 | 11,462 |
1,308,760 | 2009-08-20T20:56:00.000 | 0 | 0 | 0 | 0 | php,python,curl,https,urllib2 | 1,308,768 | 2 | false | 0 | 0 | No problem since the proxy server supports the CONNECT method. | 1 | 2 | 0 | I need to make a cURL request to a https URL, but I have to go through a proxy as well. Is there some problem with doing this? I have been having so much trouble doing this with curl and php, that I tried doing it with urllib2 in Python, only to find that urllib2 cannot POST to https when going through a proxy. I ha... | cURL: https through a proxy | 0 | 0 | 1 | 9,009 |
1,308,879 | 2009-08-20T21:17:00.000 | 2 | 0 | 0 | 0 | .net,python,networking,sockets | 1,308,897 | 3 | false | 0 | 0 | Normally you just listen on 0.0.0.0. This is an alias for all IP addresses. | 2 | 6 | 0 | I need to simulate multiple embedded server devices that are typically used for motor control. In real life, there can be multiple servers on the network and our desktop software acts as a client to all the motor servers simultaneously. We have a half-dozen of these motor control servers on hand for basic testing, bu... | Simulate multiple IP addresses for testing | 0.132549 | 0 | 1 | 9,577 |
1,308,879 | 2009-08-20T21:17:00.000 | 5 | 0 | 0 | 0 | .net,python,networking,sockets | 1,309,096 | 3 | true | 0 | 0 | A. consider using Bonjour (zeroconf) for service discovery
B. You can assign 1 or more IP addresses the same NIC:
On XP, Start -> Control Panel -> Network Connections and select properties on your NIC (usually 'Local Area Connection').
Scroll down to Internet Protocol (TCP/IP), select it and click on [Properties].
If y... | 2 | 6 | 0 | I need to simulate multiple embedded server devices that are typically used for motor control. In real life, there can be multiple servers on the network and our desktop software acts as a client to all the motor servers simultaneously. We have a half-dozen of these motor control servers on hand for basic testing, bu... | Simulate multiple IP addresses for testing | 1.2 | 0 | 1 | 9,577 |
1,309,355 | 2009-08-20T23:16:00.000 | 0 | 0 | 1 | 0 | python,date | 1,309,373 | 8 | false | 0 | 0 | I would probably just loop over the days checking if the day is mon-fri.
Not as efficent but easier to get right. | 1 | 2 | 0 | I need to calculate date (year, month, day) which is (for example) 18 working days back from another date. It would be enough to eliminate just weekends.
Example: I've got a date 2009-08-21 and a number of 18 workdays as a parameter, and correct answer should be 2009-07-27.
thanks for any help | How to calculate a date back from another date with a given number of work days | 0 | 0 | 0 | 1,942 |
1,309,606 | 2009-08-21T00:59:00.000 | 0 | 0 | 0 | 0 | python,django | 1,309,619 | 4 | false | 1 | 0 | Make sure that site-dependencies, django, registration, sorl, and typogrify all have __init__.py files in them. | 1 | 1 | 0 | I have a django project which is laid out like this...
myproject
apps
media
templates
django
registration
sorl
typogrify
I'd like to change it to this...
myproject
apps
media
templates
site-deps
django
registration
sorl
typogrify
When I attempt it the 'site-dependencies' all break. Is there a way to imple... | How to tame the location of third party contributions in Django | 0 | 0 | 0 | 330 |
1,310,740 | 2009-08-21T08:37:00.000 | -1 | 0 | 1 | 0 | python,python-3.x | 1,310,787 | 5 | true | 0 | 0 | EDIT IN 2021: This is incorrect. Do not refer to this answer. | 1 | 62 | 0 | I have written a function comp(time1, time2) which will return True when time1 is less than time2. I have a scenario where time1 should always be less than time2. I need time1 to have the least possible value (i.e. represent the earliest possible moment). How can I get this time? | What is the oldest time that can be represented in Python? | 1.2 | 0 | 0 | 58,038 |
1,312,940 | 2009-08-21T16:26:00.000 | 0 | 0 | 1 | 0 | python,string | 1,313,334 | 8 | false | 0 | 0 | Other answers are about nested quoting. Another point of view I've come across, but I'm not sure I subscribe to, is to use single-quotes(') for characters (which are strings, but ord/chr are quick picky) and to use double-quotes for strings. Which disambiguates between a string that is supposed to be one character and ... | 4 | 2 | 0 | What is the best literal delimiter in Python and why? Single ' or double "? And most important, why?
I'm a beginner in Python and I'm trying to stick with just one. I know that in PHP, for example " is preferred, because PHP does not try to search for the 'string' variable. Is the same case in Python? | Python: what kind of literal delimiter is "better" to use? | 0 | 0 | 0 | 2,994 |
1,312,940 | 2009-08-21T16:26:00.000 | 9 | 0 | 1 | 0 | python,string | 1,312,949 | 8 | true | 0 | 0 | ' because it's one keystroke less than ". Save your wrists!
They're otherwise identical (except you have to escape whichever you choose to use, if they appear inside the string). | 4 | 2 | 0 | What is the best literal delimiter in Python and why? Single ' or double "? And most important, why?
I'm a beginner in Python and I'm trying to stick with just one. I know that in PHP, for example " is preferred, because PHP does not try to search for the 'string' variable. Is the same case in Python? | Python: what kind of literal delimiter is "better" to use? | 1.2 | 0 | 0 | 2,994 |
1,312,940 | 2009-08-21T16:26:00.000 | 0 | 0 | 1 | 0 | python,string | 1,314,042 | 8 | false | 0 | 0 | This is a rule I have heard about:
") If the string is for human consuption, that is interface text or output, use ""
') If the string is a specifier, like a dictionary key or an option, use ''
I think a well-enforced rule like that can make sense for a project, but it's nothing that I would personally care much about.... | 4 | 2 | 0 | What is the best literal delimiter in Python and why? Single ' or double "? And most important, why?
I'm a beginner in Python and I'm trying to stick with just one. I know that in PHP, for example " is preferred, because PHP does not try to search for the 'string' variable. Is the same case in Python? | Python: what kind of literal delimiter is "better" to use? | 0 | 0 | 0 | 2,994 |
1,312,940 | 2009-08-21T16:26:00.000 | 0 | 0 | 1 | 0 | python,string | 1,312,960 | 8 | false | 0 | 0 | Single and double quotes act identically in Python. Escapes (\n) always work, and there is no variable interpolation. (If you don't want escapes, you can use the r flag, as in r"\n".)
Since I'm coming from a Perl background, I have a habit of using single quotes for plain strings and double-quotes for formats used wi... | 4 | 2 | 0 | What is the best literal delimiter in Python and why? Single ' or double "? And most important, why?
I'm a beginner in Python and I'm trying to stick with just one. I know that in PHP, for example " is preferred, because PHP does not try to search for the 'string' variable. Is the same case in Python? | Python: what kind of literal delimiter is "better" to use? | 0 | 0 | 0 | 2,994 |
1,313,000 | 2009-08-21T16:39:00.000 | 3 | 0 | 0 | 0 | python,mysql | 1,313,013 | 3 | false | 0 | 0 | Make another table and do one-to-many. Don't try to cram a programming language feature into a database as-is if you can avoid it.
If you absolutely need to be able to store an object down the line, your options are a bit more limited. YAML is probably the best balance of human-readable and program-readable, and it h... | 2 | 0 | 0 | I need to insert a python tuple (of floats) into a MySQL database. In principle I could pickle it and insert it as a string, but that would grant me the chance only to retrieve it through python. Alternative is to serialize the tuple to XML and store the XML string.
What solutions do you think would be also possible, w... | Inserting python tuple in a MySQL database | 0.197375 | 1 | 0 | 2,884 |
1,313,000 | 2009-08-21T16:39:00.000 | 2 | 0 | 0 | 0 | python,mysql | 1,313,016 | 3 | true | 0 | 0 | I'd look at serializing it to JSON, using the simplejson package, or the built-in json package in python 2.6.
It's simple to use in python, importable by practically every other language, and you don't have to make all of the "what tag should I use? what attributes should this have?" decisions that you might in XML. | 2 | 0 | 0 | I need to insert a python tuple (of floats) into a MySQL database. In principle I could pickle it and insert it as a string, but that would grant me the chance only to retrieve it through python. Alternative is to serialize the tuple to XML and store the XML string.
What solutions do you think would be also possible, w... | Inserting python tuple in a MySQL database | 1.2 | 1 | 0 | 2,884 |
1,313,362 | 2009-08-21T17:56:00.000 | 0 | 0 | 0 | 0 | python,django,database | 1,315,203 | 5 | false | 1 | 0 | Just commentize the django app strings of the INSTALLED_APPS tuple in your project settings.py file (at the beginning of the project, before running syncdb). | 3 | 1 | 0 | is it possible to write Django apps, for example for internal/personal use with existing databases, without having the 'overhead' of Djangos own tables that are usually installed when starting a project? I would like to use existing tables via models, but not have all the other stuff that is surely useful on normal web... | Django without additional tables? | 0 | 0 | 0 | 409 |
1,313,362 | 2009-08-21T17:56:00.000 | 3 | 0 | 0 | 0 | python,django,database | 1,313,406 | 5 | false | 1 | 0 | Django doesn't install any tables by itself. It comes with some pre-fabricated applications, which install tables, but those are easily disabled by removing them from the INSTALLED_APPS setting. | 3 | 1 | 0 | is it possible to write Django apps, for example for internal/personal use with existing databases, without having the 'overhead' of Djangos own tables that are usually installed when starting a project? I would like to use existing tables via models, but not have all the other stuff that is surely useful on normal web... | Django without additional tables? | 0.119427 | 0 | 0 | 409 |
1,313,362 | 2009-08-21T17:56:00.000 | 0 | 0 | 0 | 0 | python,django,database | 1,313,575 | 5 | false | 1 | 0 | Don't install any of Django's built-in apps and don't use any models.py in your apps. Your database will have zero tables in it.
You won't have users, sites or sessions -- those are Django features that use the database.
AFAIK you should still, however, have a SQLite database. I think that parts of Django assume you'... | 3 | 1 | 0 | is it possible to write Django apps, for example for internal/personal use with existing databases, without having the 'overhead' of Djangos own tables that are usually installed when starting a project? I would like to use existing tables via models, but not have all the other stuff that is surely useful on normal web... | Django without additional tables? | 0 | 0 | 0 | 409 |
1,313,626 | 2009-08-21T18:44:00.000 | 1 | 0 | 0 | 1 | python,google-app-engine,optimization,caching,memcached | 1,348,633 | 2 | false | 1 | 0 | A couple of alternatives to regular eviction:
The obvious one: Don't evict, and set a timer instead. Even a really short one - a few seconds - can cut down on effort a huge amount for a popular app, without users even noticing data may be a few seconds stale.
Instead of evicting, generate the cache key based on criter... | 1 | 2 | 0 | I've written an application for Google AppEngine, and I'd like to make use of the memcache API to cut down on per-request CPU time. I've profiled the application and found that a large chunk of the CPU time is in template rendering and API calls to the datastore, and after chatting with a co-worker I jumped (perhaps a ... | Where is the best place to put cache-evicting logic in an AppEngine application? | 0.099668 | 0 | 0 | 306 |
1,313,989 | 2009-08-21T20:11:00.000 | 1 | 0 | 0 | 0 | python,django | 1,314,005 | 7 | false | 1 | 0 | You didn't have to do anything when deploying a PHP site because your hosting provider had already installed it. Web hosts which support Django typically install and configure it for you. | 1 | 3 | 0 | To deploy a site with Python/Django/MySQL I had to do these on the server (RedHat Linux):
Install MySQLPython
Install ModPython
Install Django (using python setup.py install)
Add some directives on httpd.conf file (or use .htaccess)
But, when I deployed another site with PHP (using CodeIgniter) I had to do nothing. I... | How can Django projects be deployed with minimal installation work? | 0.028564 | 1 | 0 | 1,978 |
1,315,511 | 2009-08-22T08:38:00.000 | 1 | 0 | 1 | 0 | python,migration,packages | 1,315,764 | 3 | false | 1 | 0 | As Vinay says, there are some parts of common installations that can't be just copied over. Also, keep in mind that setup.py scripts can perform arbitrary work, for example, they could test for the version of Python, and change how they install things, or they could write registry entries, or create .rc files, etc.
... | 2 | 2 | 0 | How can i quickly migrate/copy my python packages that i have installed over time to a new machine?
This is my scenario;
Am upgrading from an old laptop running python2.5 & Django1.0, to a new laptop which i intend to install python 2.6.2 & Django 1.1. In time i have downloaded and installed many python packages in my ... | How to migrate packages to a new Python installation? | 0.066568 | 0 | 0 | 2,862 |
1,315,511 | 2009-08-22T08:38:00.000 | 3 | 0 | 1 | 0 | python,migration,packages | 1,315,529 | 3 | false | 1 | 0 | If they're pure Python, then in theory you could just copy them across from one Lib\site-packages directory to the other. However, this will not work for any packages which include C extensions (as these need to be recompiled anew for every Python version). You also need to consider e.g. .pth files which have been crea... | 2 | 2 | 0 | How can i quickly migrate/copy my python packages that i have installed over time to a new machine?
This is my scenario;
Am upgrading from an old laptop running python2.5 & Django1.0, to a new laptop which i intend to install python 2.6.2 & Django 1.1. In time i have downloaded and installed many python packages in my ... | How to migrate packages to a new Python installation? | 0.197375 | 0 | 0 | 2,862 |
1,316,357 | 2009-08-22T16:24:00.000 | -1 | 0 | 0 | 0 | python,compression,zlib,corruption | 1,317,724 | 4 | false | 0 | 0 | Okay sorry I wasn't clear enough. This is win32, python 2.6.2. I'm afraid I can't find the zlib file, but its whatever is included in the win32 binary release. And I don't have access to the original data -- I've been compressing my log files, and I'd like to get them back. As far as other software, I've naievely tried... | 1 | 12 | 0 | Okay so I have some data streams compressed by python's (2.6) zlib.compress() function. When I try to decompress them, some of them won't decompress (zlib error -5, which seems to be a "buffer error", no idea what to make of that). At first, I thought I was done, but I realized that all the ones I couldn't decompress s... | zlib decompression in python | -0.049958 | 0 | 0 | 82,088 |
1,316,386 | 2009-08-22T16:33:00.000 | 0 | 1 | 1 | 0 | python,linguistics | 1,316,803 | 5 | false | 0 | 0 | What to use depends on what you want to translate.
Texts that are a part of your application, like UI etc. Then use gettext directly, or zope.i18n, which wraps gettext so it's easier to use.
Arbitrary texts: The Google Translation API is the thing for you.
"Content", ie things that the user of the application will mod... | 1 | 14 | 0 | Is there a Python module for the translation of texts from one human language to another? I'm planning to work with texts that are to be pre and post processed with Python scripts.
What other Python-integrated approaches can be used? | Translating human languages in Python | 0 | 0 | 0 | 31,530 |
1,316,767 | 2009-08-22T19:10:00.000 | 29 | 0 | 1 | 0 | python,memory,memory-management | 1,317,085 | 10 | false | 0 | 0 | (del can be your friend, as it marks objects as being deletable when there no other references to them. Now, often the CPython interpreter keeps this memory for later use, so your operating system might not see the "freed" memory.)
Maybe you would not run into any memory problem in the first place by using a more compa... | 4 | 532 | 0 | I wrote a Python program that acts on a large input file to create a few million objects representing triangles. The algorithm is:
read an input file
process the file and create a list of triangles, represented by their vertices
output the vertices in the OFF format: a list of vertices followed by a list of triangles... | How can I explicitly free memory in Python? | 1 | 0 | 0 | 688,168 |
1,316,767 | 2009-08-22T19:10:00.000 | 127 | 0 | 1 | 0 | python,memory,memory-management | 1,316,799 | 10 | false | 0 | 0 | Unfortunately (depending on your version and release of Python) some types of objects use "free lists" which are a neat local optimization but may cause memory fragmentation, specifically by making more and more memory "earmarked" for only objects of a certain type and thereby unavailable to the "general fund".
The onl... | 4 | 532 | 0 | I wrote a Python program that acts on a large input file to create a few million objects representing triangles. The algorithm is:
read an input file
process the file and create a list of triangles, represented by their vertices
output the vertices in the OFF format: a list of vertices followed by a list of triangles... | How can I explicitly free memory in Python? | 1 | 0 | 0 | 688,168 |
1,316,767 | 2009-08-22T19:10:00.000 | 4 | 0 | 1 | 0 | python,memory,memory-management | 1,316,811 | 10 | false | 0 | 0 | If you don't care about vertex reuse, you could have two output files--one for vertices and one for triangles. Then append the triangle file to the vertex file when you are done. | 4 | 532 | 0 | I wrote a Python program that acts on a large input file to create a few million objects representing triangles. The algorithm is:
read an input file
process the file and create a list of triangles, represented by their vertices
output the vertices in the OFF format: a list of vertices followed by a list of triangles... | How can I explicitly free memory in Python? | 0.07983 | 0 | 0 | 688,168 |
1,316,767 | 2009-08-22T19:10:00.000 | 25 | 0 | 1 | 0 | python,memory,memory-management | 1,316,790 | 10 | false | 0 | 0 | You can't explicitly free memory. What you need to do is to make sure you don't keep references to objects. They will then be garbage collected, freeing the memory.
In your case, when you need large lists, you typically need to reorganize the code, typically using generators/iterators instead. That way you don't need t... | 4 | 532 | 0 | I wrote a Python program that acts on a large input file to create a few million objects representing triangles. The algorithm is:
read an input file
process the file and create a list of triangles, represented by their vertices
output the vertices in the OFF format: a list of vertices followed by a list of triangles... | How can I explicitly free memory in Python? | 1 | 0 | 0 | 688,168 |
1,318,311 | 2009-08-23T11:13:00.000 | 2 | 1 | 1 | 0 | python,py2exe | 1,319,719 | 3 | false | 0 | 0 | Look through the third-party libraries that you use. Some libraries (e.g. PIL) do tricks with conditional imports that make it hard for py2exe to bundle the right code. These issues can often be worked around, but a bit of googling up front might save you some headaches later. | 1 | 2 | 0 | im looking for simple script that will compile to exe , and i found py2exe
before i decide to work with it , what do you think are the pros and cons of the py2exe tool? | what are the pros/cons of py2exe | 0.132549 | 0 | 0 | 969 |
1,319,585 | 2009-08-23T21:15:00.000 | 8 | 0 | 0 | 0 | python,sqlalchemy,sqlobject | 1,319,598 | 3 | true | 0 | 0 | That doesn't do away with the need for an ORM. That is an ORM. In which case, why reinvent the wheel?
Is there a compelling reason you're trying to avoid using an established ORM? | 2 | 3 | 0 | Rather than use an ORM, I am considering the following approach in Python and MySQL with no ORM (SQLObject/SQLAlchemy). I would like to get some feedback on whether this seems likely to have any negative long-term consequences since in the short-term view it seems fine from what I can tell.
Rather than translate a row ... | Is this a good approach to avoid using SQLAlchemy/SQLObject? | 1.2 | 1 | 0 | 569 |
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