Python list slice syntax used for no obvious reason
- by Charles Anderson
I occasionally see the list slice syntax used in Python code like this:
newList = oldList[:]
Surely this is just the same as:
newList = oldList
Or am I missing something?
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how to measure running time of algorithms in python
- by Bunny Rabbit
How can i mesure and compare the running times of my algorithms written in python .Also point me to a nice algorithms site/forum like stackoverflow if you can.Read the article
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Code Analysis In Python
- by Jerub
What tools are good to use for code analysis in python? I have a large source repository split across multiple projects, and I would like to be able to run tools across the directories to see details like Cyclomatic Complexity, and perhaps be able to spot errors using static analysis. Ideally, I would like to be able to produce a report about the health of the source code, so we can spot problem areas that need to be addressed.Read the article
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Angles between two n-dimensional vectors in Python
- by Peter
In need to determine the angle(s) between two n-dimensional vectors in Python. For example, the input can be two lists like the following: [1,2,3,4] and [6,7,8,9]. Can anybody help me? Thanks in advance!Read the article
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How to get the nth element of a python list or a default if not available
- by xulochavez
Hi guys I'm looking for an equivalent in python of dictionary.get(key, default) for lists. Is there any one liner idiom to get the nth element of a list or a default value if not available? Thanks!Read the article
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Read more numbers in a line in Python
- by VaioIsBorn
Let say i want to read the integers a, b and c from stdin (in one line, do not need to press return after each number). In c++, i would just do: cin a b c; How to do this in Python ?Read the article
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What to put in a python module docstring?
- by 007brendan
Ok, so I've read both PEP 8 and PEP 257, and I've written lots of docstrings for functions and classes, but I'm a little unsure about what should go in a module docstring. I figured, at a minimum, it should document the functions and classes that the module exports, but I've also seen a few modules that list author names, copyright information, etc. Does anyone have an example of how a good python docstring should be structured?Read the article
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Latest books to learn PHP, Python?
- by Sandy
Decided to learn PHP, Python. Lots of topic/books are there, but don't know which are latest/newbie friendly. Need your help..Read the article
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Dealing with wacky encodings in Python
- by Tyson
I have a Python script that pulls in data from many sources (databases, files, etc.). Supposedly, all the strings are unicode, but what I end up getting is any variation on the following theme (as returned by repr()): u'D\\xc3\\xa9cor' u'D\xc3\xa9cor' 'D\\xc3\\xa9cor' 'D\xc3\xa9cor' Is there a reliable way to take any four of the above strings and return the proper unicode string? u'D\xe9cor' # --> Décor The only way I can think of right now uses eval(), replace(), and a deep, burning shame that will never wash away.Read the article
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perl code to python code
- by Eva
can you convert this perl code to python code : $list = $ARGV[0]; open (PASSFILE, "$list") || die "[-] Can't open the List of password file !"; @strings = ; close PASSFILE; ThanksRead the article
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Splitting a list in python
- by mglmnc
Hey im new to python. How do you get a portion of a list by the relative value of its sorting key. example... list = [11,12,13,14,15,16,1,2,3,4,5,6,7,8,9,10] list.sort() newList = list.split("all numbers that are over 13") assert newList == [14,15,16]Read the article
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maya2008 win32api 64 bit python
- by knishua
how is it possible to run import win32api successfully on a 64bit maya version 2008 following error occurs Error: No module named win32api Traceback (most recent call last): File "", line 1, in ImportError: No module named win32api # I need to get mouse cursor position in python so that i can place window exactly in that position. Is there any other way to get it Brgds, kNishRead the article
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Python urllib.urlopen() call doesn't work with a URL that a browser accepts
- by Charles Anderson
If I point Firefox at http://bitbucket.org/tortoisehg/stable/wiki/Home/ReleaseNotes, I get a page of HTML. But if I try this in Python: import urllib site = 'http://bitbucket.org/tortoisehg/stable/wiki/Home/ReleaseNotes' req = urllib.urlopen(site) text = req.read() I get the following: 500 Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. What am I doing wrong?Read the article
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Importing a CSV file into a sqlite3 database table using Python
- by Hossein
Hi, I have a CSV file and I want to bulk-import this file into my sqlite3 database using Python. the command is ".import .....". but it seems that it cannot work like this. Can anyone give me an example of how to do it in sqlite3? I am using windows just in case. ThanksRead the article
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Implement python replace() function without using regexp
- by jwesonga
I'm trying to rewrite the equivalent of the python replace() function without using regexp. Using this code, i've managed to get it to work with single chars, but not with more than one character: def Replacer(self, find_char, replace_char): s = [] for char in self.base_string: if char == find_char: char = replace_char #print char s.append(char) s = ''.join(s) my_string.Replacer('a','E') Anybody have any pointers how to make this work with more than one character? example: my_string.Replacer('kl', 'lll')Read the article
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Python CLI tool - general parsing question
- by WinkyWolly
If possible I would like to use the following structure for a command however I can't seem to figure out how to achieve this in Python: ./somescript.py arg <optional argument> -- "some long argument" Would it be possible to achieve this in a feasible manner without too much dirty code? Or should I just reconsider the syntax (which is primarily preference). Thanks!Read the article
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set timeout to http response read method in python
- by nirtayeb
Hi, I'm building a download manager in python for fun, and sometimes the connection to the server is still on but the server doesn't send me data, so read method (of HTTPResponse) block me forever. This happens, for example, when I download from a server, which located outside of my country, that limit the bandwidth to other countries. How can I set a timeout for the read method (2 minutes for example)? Thanks, Nir.Read the article
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super function doesn't work inside a maya python module
- by sfjedi
Somehow, this works fine in the Maya/Python script editor, but fails when it's inside of my module code. Anyone have any ideas? class ControlShape(object): def __init__(self, *args, **kwargs): print 'Inside ControlShape...' class Cross(ControlShape): def __init__(self, *args, **kwargs): print 'Entering Cross...' super(Cross, self).__init__(*args, **kwargs) print 'Leaving Cross...' x = Cross() This gives me a TypeError: super(type, obj): obj must be an instance or subtype of type.Read the article
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time series in python up to microseconds
- by Abruzzo Forte e Gentile
Hi All I would like to handle time series in python. I have been suggested to use scikit.timeseries but I need to handle up to microseconds and this last, as far as I know, handles up to milliseconds. Do you know any other library able to do that? At some point I need to merge 2 time series sampled at different time, and I would like to avoid rewriting such kind of features or any new classes from scratch whenever it is possible. I thank you all AFGRead the article
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Play DVDs in Python?
- by Zachary Brown
I want to write a custom DVD player using python that plays for 30 seconds, then pauses and asks a question. Once the question is anwered, it tells the user if they are right or wrong and gives them a Resume button to resume DVD playback. How do I do this. I have never written a DVD player before, but I am open to learning!Read the article
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Python and the Singleton Pattern
- by dmanxiii
What is the best way to implement the singleton pattern in Python? It seems impossible to declare the constructor private or protected as is normally done with the Singleton pattern...Read the article
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Automatically open files given as command line arguments in Python
- by mk
I have a lot of Perl scripts that looks something like the following. What it does is that it will automatically open any file given as a command line argument and in this case print the content of that file. If no file is given it will instead read from standard input. while ( <> ) { print $_; } Is there a way to do something similar in Python without having to explicitly open each file?Read the article
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Finding maximum of a list of lists by sum of elements in Python
- by Don Stewart
What's the idiomatic way to do maximumBy (higher order function taking a comparison function for the test), on a list of lists, where the comparison we want to make is the sum of the list, in Python? Here's a Haskell implementation and example output: > maximumBy (compare `on` sum) [[1,2,3],[4,5,6],[1,3,5]] > [4,5,6]Read the article
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Difference between Python urllib.urlretrieve() and wget
- by jrdioko
I am trying to retrieve a 500mb file using Python, and I have a script which uses urllib.urlretrieve(). There seems to some network problem between me and the download site, as this call consistently hangs and fails to complete. However, using wget to retrieve the file tends to work without problems. What is the difference between urlretrieve() and wget that could cause this difference?Read the article
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How to start a Python script several functions in
- by chrissygormley
Hello, I have a Python script and I want to call it several functions down the script. Example code below: class Name(): def __init__(self): self.name = 'John' self.address = 'Place' self.age = '100' def printName(self): print self.name def printAddress(self): print self.address def printAge(self): print self.age if __name__ == '__main__': Person = Name() Person.printName() Person.printAddress() Person.printage() I execute this code by entering ./name.py. How could I exectute this code from the function printAddress() down the the end of the script? ThanksRead the article
