I want to change the value of a particular string index, but unfortunately string[4] = "a" raises a TypeError, because strings are immutable ("item assignment is not supported"). So instead I use the rather clumsy string = string[:4] + "a" + string[4:] Is there a better way of doing this? ...
I'm writing a Python script that goes through a directory and gathers certain files, but there are a number of files I want excluded that all start the same. Example code: for name in files: if name != "doc1.html" and name != "doc2.html" and name != "doc3.html": print name Let's say there are 100 hundred HTML files in the di...
I originally posted this question looking for an answer with using python, got some good help, but have still not been able to find a solution. I have a script running on OS X 10.5 client machines that captures internet browsing history (required as part of my sys admin duties in a US public school). Firefox 3.x stores history in a sqlit...
Does anyone know good books that discuss the underlying architectures, in-depth analysis of CPython implementation. Something like how list / tuple / dict implemented (and performance comparison...) OOP discussion in Python context Sorry if it sounds like a silly question :( ...
How do I set the hardware clock with Python on embedded linux systems? Regards, ...
I am creating a small PyQt application and got stuck up in MouseOver effect. I have a QMainWindow which has three buttons named createProfileButton, downloadPackagesButton and installPackagesButton. All these are of type QPushButton Now I have created a Label which will hold the text when someone hovers the mouse over any of these butt...
Hello, how do I print help info if no arguments are passed to python script? #!/usr/bin/env python import sys for arg in sys.argv: if arg == "do": do this if arg == "" print "usage is bla bla bla" what I'm missing is if arg == "" line that I don't know how to express :( ...
I know it's wired to have such a case but somehow I have it: class foo #static method @staticmethod def test(): pass # class variable c = {'name' : <i want to reference test method here.>} What's the way to it? Just for the record: I believe this should be considered as python worst practices. Using static methods is ...
I want to put multiple datasets on a bar graph and stop the smaller bars being obscured by the larger ones, and I don't want to offset them. For example, bar(0, 1.) bar(0, 2.) only shows the second bar of height of 2.0, the first bar is hidden. Is there a way to get matplotlib to draw the bars with the smallest on top? NB I don't wan...
hello everyone, I have a file of lines and this in turn saves information, speed, timing and type of surfaces for each line. I want to do is sort this information in a np.array in the order shown below where the id is the number of the line. (id) 0 1 2 3 4 5 6 7 8 9 0 t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 1 t1 t2 t3 ...
Where should I write codes for checking validity of class' properties? (For examples: "amount" should be a positive integer, "email" should be a string with correct e-mail formatting) At the setter methods, At somewhere I use that (using try/catch), or others. If I check validity at setter methods, it may be looked ugly (like type check...
In python I can easily get an index when iterating e.g. >>> letters = ['a', 'b', 'c'] >>> [(char, i) for i, char in enumerate(letters)] [('a', 0), ('b', 1), ('c', 2)] How can I do something similar with linq? ...
I prefer to document each parameter (as needed) on the same line where I declare the parameter in order to apply D.R.Y. If I have code like this: def foo( flab_nickers, # a series of under garments to process has_polka_dots=False, needs_pressing=False # Whether the list of garments should all be pressed ): ...
QGraphicsView is often hooked up to a QGraphicsScene. What if I want to swap that QGraphicsScene for a new one? How can I accomplish this? Doing it right now is just drawing over the old one. ...
Django's website seems good but for some reason I couldn't find where to download the documentation: http://docs.djangoproject.com/en/1.1/ (Yes, I need the docs for 1.1) Does anyone know? ...
I am using M2Crypto-0.20.2. I want to use engine_pkcs11 from the OpenSC project and the Aladdin PKI client for token based authentication making xmlrpc calls over ssl. from M2Crypto import Engine Engine.load_dynamic() dynamic = Engine.Engine('dynamic') # Load the engine_pkcs from the OpenSC project dynamic.ctrl_cmd_string("SO_PATH", "/...
I use python based as well as rails applications on ubuntu linux. We have functionalities like register, forgot password, reset password, email alerts etc features based on emails. Since now a days, we go on offline development, we want to run a local smtp & pop3 server to send and receive emails. Emails shall be send via the our web ap...
Suppose I have a string "a foobar" and I use "^a\s*" to match "a ". Is there a way to easily get "foobar" returned? (What was NOT matched) I want to use a regex to look for a command word and also use the regex to remove the command word from the string. I know how to do this using something like: mystring[:regexobj.start()] + email...
how do I know if a remote user is connected in django?, like gmail chat, or facebook chat... I need that in the templates system. Sorry for my english ...
I cannot get the example Python programs to run. When executing the Python command "from opencv import cv" I get the message "ImportError: No module named _cv". There is a stale _cv.pyd in the site-packages directory, but no _cv.py anywhere. See step 5 below. MS Windows XP, VC++ 2008, Python 2.6, OpenCV 2.0 Here's what I have done. ...