Note: The title is provocating (to make you click on it and want to close-vote the question) and I don't want to look preoccupated. Since some time now I read and heard more and more about PyPy. It's like a linear graph. Why is PyPy so special? As far as I know implementations of dynamic languages written in the languages itself aren'...
Hey all, I am streaming some data down from a webcam. When I get all of the bytes for a full image (in a string called byteString) I want to display the image using OpenCV. Done fast enough, this will "stream" video from the webcam to an OpenCV window. Here's what I've done to set up the window: cvNamedWindow('name of window', CV_WIND...
Looking for solutions that push the envelope and: Avoid Manually writing SQL queries(Python can be more OO not passing DSL strings) Using non-Python datatypes for a supposedly required model definition Using a new class of types rather than perfectly good native Python types Boast Using Python objects Using Object Oriented and key...
Hi there, I'm doing a Simulated Annealing algorithm to optimise a given allocation of students and projects. This is language-agnostic pseudocode from Wikipedia: s ← s0; e ← E(s) // Initial state, energy. sbest ← s; ebest ← e // Initial "best" solution k ← 0 ...
I have a large music library which I have just spent around 30 hours organizing. For some of the MP3 files, I embedded the cover art image as type 0 (Other) and I'd like to change it to type 3 (Front Cover). Is there a way to do this in Python, specifically in Mutagen? ...
What's the best way to count the number of occurrences of a given string, including overlap in python? is it the most obvious way: def function(string, str_to_search_for): count = 0 for x in xrange(len(string) - len(str_to_search_for) + 1): if string[x:x+len(str_to_search_for)] == str_to_search_for: ...
Hi, I'm wondering if anyone with a better understanding of python and gae can help me with this. I am uploading a csv file from a form to the gae datastore. class CSVImport(webapp.RequestHandler): def post(self): csv_file = self.request.get('csv_import') fileReader = csv.reader(csv_file) for row in fileReader: ...
Reading the changes in Python 3.1, I found something... unexpected: The sys.version_info tuple is now a named tuple: I never heard about named tuples before, and I thought elements could either be indexed by numbers (like in tuples and lists) or by keys (like in dicts). I never expected they could be indexed both ways. Thus, my qu...
I want to use a pyGame program as a part of another process. Using the following code, pyGame doesn't seem to be processing events; it doesn't respond to the 'q' key nor does it draw the titlebar for the window. If go() is not run as a thread, it works fine. This is under OSX; I'm unsure if that's the problem or not. import pygame, thre...
I have a python .pyd that is a mixed mode C++ DLL. The DLL loads fine and loads unmanaged C++ dlls without a problem, but when it tries to load the .NET dlls referenced by the managed C++ dlls it fails with this error message: Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly '...' Copying these .N...
The following is the result of CherryPy and css pathing problems I have recently posted, both of which have been answered, but another problem has arisen. I have a html page which I preview in a browser (via. editor/IDE) and which calls a css file from a css folder in parallel with my application folder (containing main.py and My.html f...
Hey! Every day I love python more and more. Today, I was writing some code like: for i in xrange(N): do_something() I had to do something N times. But each time didn't depend on the value of i (index variable). I realized that I was creating a variable I never used (i), and I thought "There surely is a more pythonic way of doing...
Hi,I am building a travel website with django. When a user is typing in the destination city name (or points of interest, like yellow stone), I want to do ajax auto suggestion. The question is how I could get the suggestion database? Is there any web service? Best if it could also support foreign cities. Thanks a lot. ...
hello. How come this is not allowed? lambda: print "x" is this not a single statement or something else? documentation is a little sparse on what allowed lambda is thank you ...
Look at the last updated release, Python 2.5?? http://pypi.python.org/pypi/processing ...
(1) is this way : http://code.google.com/intl/en/appengine/articles/djangoforms.html (2) is write by self : #/usr/bin/env python2.5 #---------------------------- # Datastore models for user & signup #---------------------------- from base64 import b64encode as b64 from hashlib import md5, sha256 from random import randint from time im...
Is NetBeans recommended for developing a GUI for a Python app? Does it have a form/screen builder for Python apps, like Dabo? ...
In one of my Django projects that use MySQL as the database, I need to have a date fields that accept also "partial" dates like only year (YYYY) and year and month (YYYY-MM) plus normal date (YYYY-MM-DD). The date field in MySQL can deal with that by accepting 00 for the month and the day. So 2010-00-00 is valid in MySQL and it represen...
Hi Guys Can you look at this code? http://pastebin.com/0Vn88te1 C:>scalp-0.4.py File "scalp-0.4.py", line 333 log_file = stream.readlines() ^ SyntaxError: invalid syntax I cannot run it. Thanks for yourhelp. ...
I have a situation where I'm downloading a lot of files. Right now everything runs on one main Python thread, and downloads as many as 3000 files every few minutes. The problem is that the time it takes to do this is too long. I realize Python has no true multi-threading, but is there a better way of doing this? I was thinking of launchi...