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python Programming Glossary: preWhat does python sys.intern do, and when should it be used? http://stackoverflow.com/questions/1136826/what-does-python-sys-intern-do-and-when-should-it-be-used an existing string object you receive a reference to the pre existing string object. This way you are saving memory . Also..
http://stackoverflow.com/questions/1319763/key-ordered-dict-in-python array in terms of keys not of insertion order . More precisely I am looking for a space efficent implementation of a.. as O N ordered iteration. I don't think you will find a pre packaged container suited to your needs because they are so.. which is the literal implication of the specs you express but does seem a pretty unlikely real life requirement. For..
Behaviour of increment and decrement operators in Python http://stackoverflow.com/questions/1485841/behaviour-of-increment-and-decrement-operators-in-python in Python I am a newbie to Python. I notice that a pre increment decrement operator can be applied on a variable like.. the value of the variable What is the behavior of the pre increment decrement operators in Python Why does Python deviate.. the and unary operators only work on numbers but I presume that you wouldn't expect a hypothetical operator to work..
Sanitising user input using Python http://stackoverflow.com/questions/16861/sanitising-user-input-using-python snippets 205 with the regex on the attribute values to prevent people from using href javascript ... and other cases described.. rjs rvb re.IGNORECASE validTags 'p i strong b u a h1 h2 h3 pre br img'.split validAttrs 'href src width height'.split urlAttrs.. .decode 'utf8' As the other posters have said pretty much all Python db libraries take care of SQL injection so..
Peak-finding algorithm for Python/SciPy http://stackoverflow.com/questions/1713335/peak-finding-algorithm-for-python-scipy something like this myself. I'm just asking if there's a pre existing function or package that's known to work well. Update..
http://stackoverflow.com/questions/1819124/image-comparison-algorithm the images which I was going to suggest as at least a pre qualification step as it would exclude very non similar images.. is long... several minutes on my machine. I would try some pre filtering to avoid wasting time comparing very dissimilar images..
How can I auto-populate a PDF form in Django/Python? http://stackoverflow.com/questions/1890570/how-can-i-auto-populate-a-pdf-form-in-django-python user to download. What python library would let me easily pre populate PDF forms These forms are intended to be printed out...
Python: How to read huge text file into memory http://stackoverflow.com/questions/1896674/python-how-to-read-huge-text-file-into-memory file on disk is not larger than RAM but the in memory representation can easily become much larger than available RAM ... fast to load this way as you have to count the lines and pre allocate the array but it may be the fastest actual sort given.. def elapsed return time.time start # count data rows to preallocate array f open 'links.csv' 'rb' def count f while 1 block..
Speed up bitstring/bit operations in Python? http://stackoverflow.com/questions/2897297/speed-up-bitstring-bit-operations-in-python ''' yield 2 sub_limit int limit 0.5 flags gmpy2.xmpz 1 # pre allocate the total length flags.bit_set limit 1 1 f_scan0 flags.bit_scan0.. #4 I made some changes in gmpy2 2.0.0b1 that break the previous example. gmpy2 no longer treats True as a special value..
Building lxml for Python 2.7 on Windows http://stackoverflow.com/questions/3047542/building-lxml-for-python-2-7-on-windows lxml version 2.2.6. NOTE Trying to build without Cython pre generated 'src lxml lxml.etree.c' need s to be available. ERROR.. v. Loewis in the email titled Download Visual Studio Express 2008 now on python list mailing list states the same Python.. releases you need to have a copy of VS 2008 or VS 2008 Express. In the light of above statements you should use VS 2008 if..
Is it worth using Python's re.compile? http://stackoverflow.com/questions/452104/is-it-worth-using-pythons-re-compile Is there any benefit in using compile for regular expressions in Python h re.compile 'hello' h.match 'hello world' vs.. _cache.clear _cache cachekey p return p I still often pre compile regular expressions but only to bind them to a nice.. cachekey p return p I still often pre compile regular expressions but only to bind them to a nice reusable name not for..
Instantiating a python class in C# http://stackoverflow.com/questions/579272/instantiating-a-python-class-in-c-sharp def add self a b return a b You can use it from your pre .NET 4.0 C# code like this ScriptEngine engine Python.CreateEngine..
Creating a singleton in python http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python Singleton what to do allowing instance creation to be pre empted. This process is the same as Python asking a class what..
http://stackoverflow.com/questions/7933596/django-dynamic-model-fields model. Is there a better approach Options that have been pre emptively discarded Custom SQL to modify tables on the fly... is that it uses several pure and simple Django models to represent dynamic fields which makes it simple to understand and database.. maintained and there is no clear leader. The usage is pretty straightforward import eav from app.models import Patient..
Using Python's Multiprocessing module to execute simultaneous and separate SEAWAT/MODFLOW model runs http://stackoverflow.com/questions/9874042/using-pythons-multiprocessing-module-to-execute-simultaneous-and-separate-seawa run through SEAWAT MODFLOW to compare the results. I have pre built the model input files for each model run and stored them.. f for f in range len files Any and all help is greatly appreciated EDIT 3 26 2012 13 31 EST Using the Manual Pool method.. as e # catch exceptions to avoid exiting the # thread prematurely print ' r failed s' args e file sys.stderr def main..
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