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python Programming Glossary: againCommon pitfalls in Python [duplicate] http://stackoverflow.com/questions/1011431/common-pitfalls-in-python Python 2.x gotcha&rsquo s and landmines Today I was bitten again by mutable default arguments after many years. I usually don't.. enumerate tab print i elem Be careful when using to check against True or False if var True # this will execute if var is True.. it just about the error you are risking. Do not check against type Python is dynamically typed therefore checking for type..
How to remove convexity defects in a Sudoku square? http://stackoverflow.com/questions/10196198/how-to-remove-convexity-defects-in-a-sudoku-square 3 0 2 0.02 0.05 mask I use connected component analysis again to extract the grid lines from these images. The grid lines..
Python Numpy Very Large Matrices http://stackoverflow.com/questions/1053928/python-numpy-very-large-matrices based solution Accessing the data as a numpy recarray again is as simple as data table row_from row_to The HDF library takes..
http://stackoverflow.com/questions/1396668/python-get-object-by-id which I retrieved by doing id thing . How do I find thing again by the id number I was given python share improve this question..
Threading in a PyQt application: Use Qt threads or Python threads? http://stackoverflow.com/questions/1595649/threading-in-a-pyqt-application-use-qt-threads-or-python-threads external reference it was however a close call. Thanks again. python multithreading pyqt share improve this question ..
What is memoization and how can I use it in Python? http://stackoverflow.com/questions/1988804/what-is-memoization-and-how-can-i-use-it-in-python the remembered result rather than computing the result again. You can think of it as a cache for method results. For further..
How do I execute a program from python? os.system fails due to spaces in path http://stackoverflow.com/questions/204017/how-do-i-execute-a-program-from-python-os-system-fails-due-to-spaces-in-path it works. However if I add a parameter it stops working again import os os.system ' C Temp a b c Notepad.exe C test.txt '..
What exactly do “u” and “r”string flags in Python, and what are raw string litterals? http://stackoverflow.com/questions/2081640/what-exactly-do-u-and-rstring-flags-in-python-and-what-are-raw-string-litte in Python 2. ru'...' and ur'...' are Unicode strings again in Python 2. and any of the other three kinds of quoting also..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained list is returned A single element is returned Is it called again When subsequent calls do stop The code comes from Jochen Schulz..
How to get current CPU and RAM usage in Python? http://stackoverflow.com/questions/276052/how-to-get-current-cpu-and-ram-usage-in-python on multiple platform or something like pystatgrab again no activity since 2007 it seems and no support for Windows ...
Python: Once and for all. What does the Star operator mean in Python? [duplicate] http://stackoverflow.com/questions/2921847/python-once-and-for-all-what-does-the-star-operator-mean-in-python of optional parameters without having to declare them. And again you can combine def sum values options s 0 for i in values s..
An executable Python app [closed] http://stackoverflow.com/questions/2933/an-executable-python-app but targets Linux platform Single executable Mac py2app again works like py2exe but targets Mac OS share improve this answer..
How is the 'is' keyword implemented in Python? http://stackoverflow.com/questions/2987958/how-is-the-is-keyword-implemented-in-python m is 'ss' False m is 'string' # Expected to work but again failed False Thanks for your help python python datamodel builtins..
Is there any way to kill a Thread in Python? http://stackoverflow.com/questions/323972/is-there-any-way-to-kill-a-thread-in-python than one you're in trouble # and you should call it again with exc NULL to revert the effect ctypes.pythonapi.PyThreadState_SetAsyncExc..
Using Django time/date widgets in custom form http://stackoverflow.com/questions/38601/using-django-time-date-widgets-in-custom-form and the many hacks required probably ought to caution you against doing this at all. It's relying on undocumented internal implementation.. implementation details of the admin is likely to break again in future versions of Django and is no easier to implement than..
Python: Is there a way to determine the encoding of text file? http://stackoverflow.com/questions/436220/python-is-there-a-way-to-determine-the-encoding-of-text-file of encoding within the document it parses the document again from the beginning and gives the new encoding a try. The only..
How to install pip on windows? http://stackoverflow.com/questions/4750806/how-to-install-pip-on-windows C but if you can't be bothered check Christoph's site again http www.lfd.uci.edu ~gohlke pythonlibs Rant Python packaging..
Regular expression to detect semi-colon terminated C++ for & while loops http://stackoverflow.com/questions/524548/regular-expression-to-detect-semi-colon-terminated-c-for-while-loops 0 when your for bracket closes. So stop when openBr is 0 again. The stopping positon is your closing bracket of for ... . Now..
http://stackoverflow.com/questions/5276967/python-in-xcode-4-or-xcode-5 to figure out exactly how to get it to work with Java then again I haven't done too much research. Surely there is some documentation..
Why is reading lines from stdin much slower in C++ than Python? http://stackoverflow.com/questions/9371238/why-is-reading-lines-from-stdin-much-slower-in-c-than-python and think about the performance implications. Thanks again Edit 7 Tiny benchmark addendum and recap Hello HN readers For..
http://stackoverflow.com/questions/1020892/urllib2-read-to-unicode the original question has been thoroughly answered . Again assuming a UTF 8 terminal x u' u0413 u043b u0430 u0432 u043d..
find length of sequences of identical values in a numpy array http://stackoverflow.com/questions/1066758/find-length-of-sequences-of-identical-values-in-a-numpy-array 0 run_ends numpy.where difs 0 return run_ends run_starts Again be sure to benchmark solutions against each others in realistic..
http://stackoverflow.com/questions/11007627/python-variable-declaration C and C# but other names here are also part of the class. Again the names are just names and they don't have associated types..
http://stackoverflow.com/questions/11254384/when-to-commit-data-in-zodb data be held in the memory till I call transaction.commit Again I am not sure why but this results in a smaller file size on..
pylab.ion() in python 2, matplotlib 1.1.1 and updating of the plot while the program runs http://stackoverflow.com/questions/12822762/pylab-ion-in-python-2-matplotlib-1-1-1-and-updating-of-the-plot-while-the-pro #pylab.draw time.sleep 1 However this doesn't work either. Again it runs cleanly but does not show the figure. It seems to do..
Why do we need tuples in Python (or any immutable data type)? http://stackoverflow.com/questions/2174124/why-do-we-need-tuples-in-python-or-any-immutable-data-type and therefore members of sets or keys in dictionaries . Again this afford optimization but far more than just substantial..
Why does Python print unicode characters when the default encoding is ASCII? http://stackoverflow.com/questions/2596714/why-does-python-print-unicode-characters-when-the-default-encoding-is-ascii 1 it yields a binary string with the same value ' xe9'. Again for the terminal this is pretty much the same as case 4 . Conclusions..
Python: Slicing a list into n nearly-equal-length partitions http://stackoverflow.com/questions/2659900/python-slicing-a-list-into-n-nearly-equal-length-partitions than the specific size as long as it's within 1. Again this is trivially convertible but I'm looking for a best practice...
How to bind self events in Tkinter Text widget after it will binded by Text widget? http://stackoverflow.com/questions/3501849/how-to-bind-self-events-in-tkinter-text-widget-after-it-will-binded-by-text-widg the binding always seems to be one character behind. Again this is because the widget binding happens before the class..
Generate multiple random numbers to equal a value in python http://stackoverflow.com/questions/3589214/generate-multiple-random-numbers-to-equal-a-value-in-python on each value . cut each of those ranges in two randomly. Again the bounds are to account for the 1 minimum. return the size..
Why are scripting languages (e.g. Perl, Python, Ruby) not suitable as shell languages? [closed] http://stackoverflow.com/questions/3637668/why-are-scripting-languages-e-g-perl-python-ruby-not-suitable-as-shell-lang names for specific actions and specific objects. Again this should sound familar to OS 400 users. For example everything.. manipulate the objects convert them back into text. Again the first and third stage basically go away because the data..
What is the difference between encode/decode? http://stackoverflow.com/questions/447107/what-is-the-difference-between-encode-decode of encoding for both these applications is... awkard. Again with separate byte and string types in Python 3 this is no longer..
How do you validate a URL with a regular expression in Python? http://stackoverflow.com/questions/827557/how-do-you-validate-a-url-with-a-regular-expression-in-python is a valid URL. The netloc hostname is . The path is . Again stupid. Also valid. This URL normalizes to which is the equivalent...
Breaking out of the Google App Engine Python lock-in? http://stackoverflow.com/questions/892411/breaking-out-of-the-google-app-engine-python-lock-in replacing with something else such as an OpenID based API. Again fairly simple but no premade solutions yet. The Memcache API..
Why is reading lines from stdin much slower in C++ than Python? http://stackoverflow.com/questions/9371238/why-is-reading-lines-from-stdin-much-slower-in-c-than-python Read 100000000 lines in 4.7275 seconds. LPS 21152829 Again it's a bit silly for me to compare C fgets cin and the first.. same file on the same box with the original synced C code. Again this is for a 100M line file on a fast disk. Here's the complete..
Python: split a list based on a condition? http://stackoverflow.com/questions/949098/python-split-a-list-based-on-a-condition anims f for f in files if f 2 .lower not in IMAGE_TYPES Again this is fine There might be slight performance improvements..
Python: How do I pass a variable by reference? http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference the sea after outer_string It was many and many a year ago Again since the the_string parameter was passed by value assigning..
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