I seem to remember that Regular Expressions in DotNet have a special mechanism that allows for the correct matching of nested structures, like the grouping in "( (a ( ( c ) b ) ) ( d ) e )". What is the python equivalent of this feature? Can this be achieved using regular expressions with some workaround? (Though it seems to be the sor...
Python and Ruby are usually considered to be close cousins (though with quite different historical baggage) with similar expressiveness and power. But some have argued that the immense success of the Rails framework really has a great deal to do with the language it is built on: Ruby itself. So why would Ruby be more suitable for such a ...
In my program, I draw some quads. I want to add the functionality for them to scale up, then down, then go back to being static (to draw attention). In the quads I have: self.scale = 10 Making scale change according to sin would be nice. But adding frequency, amplitude and logic to my already bloated quad class is something I take as ...
I'm trying to import pycurl: $ python -c "import pycurl" Traceback (most recent call last): File "<string>", line 1, in <module> ImportError: libcurl.so.4: cannot open shared object file: No such file or directory Now, libcurl.so.4 is in /usr/local/lib. As you can see, this is in sys.path: $ python -c "import sys; print sys.path" [''...
I'm creating a code that gets image's urls from any web pages, the code are in python and use BeutifulSoup and httplib2. When I run the code, I get the next error: Look me http://movies.nytimes.com (this line is printed by the code) Traceback (most recent call last): File "main.py", line 103, in <module> visit(initialList,profu...
Is there a FFT-based 2D cross-correlation or convolution function built into scipy (or another popular library)? There are functions like these: scipy.signal.correlate2d - "the direct method implemented by convolveND will be slow for large data" scipy.ndimage.correlate - "The array is correlated with the given kernel using exact calcu...
I have some models set up like: class Apps(db.Model): name = db.StringProperty(multiline=False) description = db.TextProperty() class AppScreenshots(db.Model): image_file = db.StringProperty(multiline=False) description = db.StringProperty(multiline=False) app = db.ReferenceProperty(Apps) ...
I have a list of strings and want to create a menu entry for each of those strings. When the user clicks on one of the entries, always the same function shall be called with the string as an argument. After some trying and research I came up with something like this: import sys from PyQt4 import QtGui, QtCore class MainWindow(QtGui.QMa...
I want to build a bot that basically does the following: Listens to the room and interacts with users and encourages them to PM the bot. Once a user has PMed the bot engage with the client using various AI techniques. Should I just use the IRC library or Sockets in python or do I need more of a bot framework. What would you do? Th...
I'm developing a simple web app, and it makes a lot of sense to store some denormalized data. Imagine a blogging platform that keeps track of Comments, and the BlogEntry model has a "CommentCount" field that I'd like to keep up to date. One way of doing this would be to use Django signals. Another way of doing this would be to put h...
Using Django's cache with locmem (with simple Python classes as values stored in lists/tuples/maps) works perfectly but does not work with memcached. Only a fraction of the keys (despite ample memory allocated and large timeouts) make their way into memcached, and none of them appear to have any associated value. When they are retrieve...
Any recommendations for a good cross-platform library for reading ELF file debug information in DWARF format? I'd like to read the DWARF debug info in a Python program. ...
Are there any reverse-egineering UML tools for Python? ...
I have a date string of the form '2009/05/13 19:19:30 -0400'. It seems that previous versions of python may have supported a %z format tag in strptime for the trailing timezone specification, but 2.6.x seems to have removed that. What's the right way to parse this string into a datetime object? ...
I think I want to use pythons built in calendar module to create an HTML calendar with data. I say I think because I'll probably think of a better way, but right now it's a little personal. I don't know if this was intended to be used this way but it seems like it is a little pointless if you can't at least making the days into a <a hr...
This is a sample script to test the use of yield... am I doing it wrong? It always returns '1'... #!/usr/bin/python def testGen(): for a in [1,2,3,4,5,6,7,8,9,10]: yield a w = 0 while w < 10: print testGen().next() w += 1 ...
I've been writing little Python programs at home to learn more about the language. The most recent feature I've tried to understand are List Comprehensions. I created a little script that estimates when my car needs its next oil change based on how frequently I've gotten the oil changed in the past. In the code snippet below, oil_chan...
I am fetching a webpage (http://autoweek.com) and trying to process it but getting encoding error. Autoweek declares "iso-8859-1" encoding and has the word "Nürburgring" (u with umlaut) I do: # -*- encoding: utf-8 -*- import urllib webpage = urllib.urlopen(feed.crawl_url).read() webpage.decode("utf-8") it gives me the following err...
Hi I have seen a couple of other posts on similar error message but couldn't find a solution which would fix it in my case. I dabbled a bit with TkInter and created a very simple UI. The code follows- from string import * from Tkinter import * import tkMessageBox root=Tk() vid = IntVar() def grabText(event): if entryBox.get().st...
Say I want to write a large application in groovy, and take advantage of closures, categories and other concepts (that I regularly use to separate concerns). Is there a way to diagram or otherwise communicate in a simple way the architecture of some of this stuff? How do you detail (without verbose documentation) the things that a map ...