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python Programming Glossary: noneHow to generate all permutations of a list in Python http://stackoverflow.com/questions/104420/how-to-generate-all-permutations-of-a-list-in-python . Here's one def permutations iterable r None # permutations 'ABCD' 2 AB AC AD BA BC BD CA CB CD DA DB DC.. 102 120 201 210 pool tuple iterable n len pool r n if r is None else r if r n return indices range n cycles range n n r 1 yield.. based on itertools.product def permutations iterable r None pool tuple iterable n len pool r n if r is None else r for indices..
http://stackoverflow.com/questions/1191374/subprocess-with-timeout object def __init__ self cmd self.cmd cmd self.process None def run self timeout def target print 'Thread started' self.process..
Python subprocess readlines() hangs http://stackoverflow.com/questions/12419198/python-subprocess-readlines-hangs True stdout os.fdopen master 'r' 0 while proc.poll is None data stdout.readline if data print data else break print This.. not data break print got repr data elif proc.poll is not None # select timeout break # proc exited os.close slave_fd # can't..
Get last n lines of a file with Python, similar to tail http://stackoverflow.com/questions/136168/get-last-n-lines-of-a-file-with-python-similar-to-tail to_read or pos 0 return lines to_read offset and offset or None avg_line_length 1.3 Is this a reasonable approach What is the..
Fastest way to list all primes below N in python http://stackoverflow.com/questions/2068372/fastest-way-to-list-all-primes-below-n-in-python i 1 0 initial 2 step 1 if initial half return 2 filter None numbers ################################################################################..
In a django form, How to make a field readonly (or disabled) so that it cannot be edited? http://stackoverflow.com/questions/324477/in-a-django-form-how-to-make-a-field-readonly-or-disabled-so-that-it-cannot-b .__init__ args kwargs instance getattr self 'instance' None if instance and instance.pk self.fields 'sku' .widget.attrs.. True def clean_sku self instance getattr self 'instance' None if instance and instance.pk return instance.sku else return..
How can I merge (union) two Python dictionaries in a single expression? http://stackoverflow.com/questions/38987/how-can-i-merge-union-two-python-dictionaries-in-a-single-expression place. x 'a' 1 'b' 2 y 'b' 10 'c' 11 z x.update y print z None x 'a' 1 'b' 10 'c' 11 So I want that final merged dict in z..
How to improve performance of this code? http://stackoverflow.com/questions/4295799/how-to-improve-performance-of-this-code openlist.put heuristicf formation node formation 0 None closedlist while 1 try f current openlist.get except IndexError.. 1 try f current openlist.get except IndexError current None if current is None print No solution found return None if solutionf.. openlist.get except IndexError current None if current is None print No solution found return None if solutionf current.arrangement..
What is the most “pythonic” way to iterate over a list in chunks? http://stackoverflow.com/questions/434287/what-is-the-most-pythonic-way-to-iterate-over-a-list-in-chunks Python's itertools docs def grouper iterable n fillvalue None args iter iterable n return izip_longest args fillvalue fillvalue..
Timeout on a Python function call http://stackoverflow.com/questions/492519/timeout-on-a-python-function-call def timeout func args kwargs timeout_duration 10 default None This function will spawn a thread and run the given function..
Take a screenshot via a python script. [Linux] http://stackoverflow.com/questions/69645/take-a-screenshot-via-a-python-script-linux w w.get_colormap 0 0 0 0 sz 0 sz 1 if pb None pb.save screenshot.png png print Screenshot saved to screenshot.png...
http://stackoverflow.com/questions/10252436/python-and-clearcase-setview shell invoked by running cleartool setview cmview . Hence none of the commands are processed beyond the point of invocation..
Python: is using “..%(var)s..” % locals() a good practice? http://stackoverflow.com/questions/1550479/python-is-using-vars-locals-a-good-practice than implicit alternative... blah.format name name There none of the maintenance performance and am I hampering lint worries..
python image recognition [closed] http://stackoverflow.com/questions/1603688/python-image-recognition Harris . A triangle has 3 corners a square 4 and a smiley none. Here's a python implementation of the Harris corner detection..
How to manage local vs production settings in Django? http://stackoverflow.com/questions/1626326/how-to-manage-local-vs-production-settings-in-django
Nested SSH session with Paramiko http://stackoverflow.com/questions/1911690/nested-ssh-session-with-paramiko just hangs until I kill the process. I'm new to Python and none too knowledgeable about networks. In the first case why does..
Process to convert simple Python script into Windows executable http://stackoverflow.com/questions/2136837/process-to-convert-simple-python-script-into-windows-executable many options but some seem dated no updates since 2008 and none were simple enough for me not to be asking this right now after..
Inverse dictionary lookup - Python http://stackoverflow.com/questions/2568673/inverse-dictionary-lookup-python python dictionary share improve this question There is none. Don't forget that the value may be found on any number of keys..
Weighted random selection with and without replacement http://stackoverflow.com/questions/352670/weighted-random-selection-with-and-without-replacement partition with that variable. Repeat steps 3 and 4 until none of the weight from the original partition need be assigned to..
IOError: request data read error http://stackoverflow.com/questions/3823280/ioerror-request-data-read-error direct utmccn direct utmcmd none ' 'beta' 'True' 'sessionid' 'b1ecf92f2bba13e1885d07803e10aa03'.. direct utmccn direct utmcmd none sessionid b1ecf92f2bba13e1885d07803e10aa03 timezone_offset 330'..
How to reliably guess the encoding between MacRoman, CP1252, Latin1, UTF-8, and ASCII http://stackoverflow.com/questions/4198804/how-to-reliably-guess-the-encoding-between-macroman-cp1252-latin1-utf-8-and seen plenty of files that use curly quotes or dashes but none that use C1 control characters. So don't even bother with them..
Prepend a line to an existing file in Python http://stackoverflow.com/questions/4454298/prepend-a-line-to-an-existing-file-in-python readable many of which are provided in other answers but none change the fundamental operation You must read in the existing..
Cross-platform gui toolkit for deploying Python applications http://stackoverflow.com/questions/520015/cross-platform-gui-toolkit-for-deploying-python-applications a good tool to design the interface they have about 3 but none of them is usable. One thing I should mention is that I found..
easy_install with various versions of python installed, mac osx http://stackoverflow.com/questions/5792060/easy-install-with-various-versions-of-python-installed-mac-osx with macports python_select l Available versions current none python24 python26 python26 apple python27 The default or system.. select list python producing Available versions for python none python24 python26 python26 apple python27 active python osx..
How do I point easy_install to vcvarsall.bat? http://stackoverflow.com/questions/6551724/how-do-i-point-easy-install-to-vcvarsall-bat such folder as the one containing vcvarsall.bat file. If none of these folders exists Python checks if there's environment..
Creating a singleton in python http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python widely accepted and considered sane because no matter what none of the users can mess them up for any other user . This is equally..
How can I print and display subprocess stdout and stderr output without distortion? http://stackoverflow.com/questions/7729336/how-can-i-print-and-display-subprocess-stdout-and-stderr-output-without-distorti have seen a number of similar questions to this on SO but none deal with both standard out and standard error or deal with..
Nice IDE for wxPython or Tkinter GUI Development [closed] http://stackoverflow.com/questions/800849/nice-ide-for-wxpython-or-tkinter-gui-development written with wxpython. You will probably see that none of these use a GUI Designer there must be a reason for this...
Python: find first element in a sequence that matches a predicate http://stackoverflow.com/questions/8534256/python-find-first-element-in-a-sequence-that-matches-a-predicate in seq if predicate x It raises StopIteration if there is none. next ifilter predicate seq None returns None if there is no..
Pyparsing: extract variable length, variable content, variable whitespace substring http://stackoverflow.com/questions/10855951/pyparsing-extract-variable-length-variable-content-variable-whitespace-substr VASA DEFERENTIA INVASION NOT IDENTIFIED. LYMPH NODES NONE SUBMITTED. OTHER HIGH GRADE PROSTATIC INTRAEPITHELIAL NEOPLASIA...
http://stackoverflow.com/questions/14102416/python-requests-requests-exceptions-sslerror-errno-8-ssl-c504-eof-occurred SSL handshake has read 0 bytes and written 226 bytes New NONE Cipher is NONE Secure Renegotiation IS NOT supported Compression.. has read 0 bytes and written 226 bytes New NONE Cipher is NONE Secure Renegotiation IS NOT supported Compression NONE Expansion.. is NONE Secure Renegotiation IS NOT supported Compression NONE Expansion NONE If I force it to use tls1 it works output truncated..
how to extract frequency associated with fft values in python http://stackoverflow.com/questions/3694918/how-to-extract-frequency-associated-with-fft-values-in-python sampwidth 2 framerate int frate nframes data_size comptype NONE compname not compressed data math.sin 2 math.pi freq x frate..
Django Admin Media prefix URL issue http://stackoverflow.com/questions/5152026/django-admin-media-prefix-url-issue endblock block blockbots meta name robots content NONE NOARCHIVE endblock head I want to get the following output for..
How can I generate a note or chord in python? http://stackoverflow.com/questions/5173795/how-can-i-generate-a-note-or-chord-in-python sampwidth 2 framerate int frate nframes datasize comptype NONE compname not compressed wav_file.setparams nchannels sampwidth..
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