python Programming Glossary: withWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python but this one is tricky. I know it has something to do with introspection but it's still unclear to me. So what are metaclasses.. object ... pass ... creates in memory an object with the name ObjectCreator . This object the class is itself capable.. keyword Python creates this object automatically. But as with most things in Python it gives you a way to do it manually...
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained right children Caller # Create an empty list and a list with the current object reference result candidates list self # Loop.. data even if it's a bit dangerous since you can end up with an infinite loop. In this case candidates.extend node._get_child_candidates.. is a list or not. Python expects iterables so it will work with strings lists tuples and generators This is called duck typing..
http://stackoverflow.com/questions/509211/pythons-slice-notation whole array There is also the step value which can be used with any of the above a start end step # start through not past end..
What is the difference between @staticmethod and @classmethod in Python? http://stackoverflow.com/questions/136097/what-is-the-difference-between-staticmethod-and-classmethod-in-python a.foo 1 # executing foo __main__.A object at 0xb7dbef0c 1 With classmethods the class of the object instance is implicitly.. methods is to create inheritable alternative constructors. With staticmethods neither self the object instance nor cls the class.. # bound method A.foo of __main__.A object at 0xb7d52f0c With a.class_foo a is not bound to foo rather the class A is bound..
When is “i += x” different from “i = i + x” in Python? http://stackoverflow.com/questions/15376509/when-is-i-x-different-from-i-i-x-in-python stores the concatenated list in the current namespace as b With no regard for what b was the line before. 1 In the expression..
How do I create a namespace package in Python? http://stackoverflow.com/questions/1675734/how-do-i-create-a-namespace-package-in-python with which you can 'append' modules to a given namespace. With the directory structure you've provided Package 1 namespace..
Convert hex string to int in Python http://stackoverflow.com/questions/209513/convert-hex-string-to-int-in-python ffff . python string hex share improve this question Without the 0x prefix you need to specify the base explicitly otherwise.. otherwise there's no way to tell x int deadbeef 16 With the 0x prefix Python can distinguish hex and decimal automatically..
What does plus equals (+=) do in Python? http://stackoverflow.com/questions/2347265/what-does-plus-equals-do-in-python points to but you're changing the list object directly. With foo foo something you're actually creating a new list. This..
Best way to strip punctuation from a string in Python http://stackoverflow.com/questions/265960/best-way-to-strip-punctuation-from-a-string-in-python there should be a simpler way than import string s string. With. Punctuation # Sample string out s.translate string.maketrans.. pays off. Timing code import re string timeit s string. With. Punctuation exclude set string.punctuation table string.maketrans..
How do I perform HTML decoding/encoding using Python/Django? http://stackoverflow.com/questions/275174/how-do-i-perform-html-decoding-encoding-using-python-django if possible and avoiding this process altogether. With Django escaping only occurs during template rendering so to..
Printing all instances of a class http://stackoverflow.com/questions/328851/printing-all-instances-of-a-class all instances of a class With a class in Python how do I define a function to print every..
How to limit execution time of a function call in Python http://stackoverflow.com/questions/366682/how-to-limit-execution-time-of-a-function-call-in-python signals and alarm might be a good way of looking at this. With a little work you could make this completely generic as well..
How can I represent an 'Enum' in Python? http://stackoverflow.com/questions/36932/how-can-i-represent-an-enum-in-python will throw KeyError if the reverse mapping doesn't exist. With the first example Numbers.reverse_mapping 'three' 'THREE' ..
What's the proper way to install pip, virtualenv, and distribute for Python? http://stackoverflow.com/questions/4324558/whats-the-proper-way-to-install-pip-virtualenv-and-distribute-for-python unpacked tarball to create a clean virtual environment. With the right command line options the virtual environment will..
Comprehension for flattening a sequence of sequences? http://stackoverflow.com/questions/457215/comprehension-for-flattening-a-sequence-of-sequences list comprehension share improve this question With a comprehension Well... seq '012345' swapped_pairs zip seq 1..
Python import MySQLdb error - Mac 10.6 http://stackoverflow.com/questions/4730787/python-import-mysqldb-error-mac-10-6 with MacPorts others prefer Fink or the newer HomeBrew . With MacPorts after installing the base files from the MacPorts ... to run Django there's a port for that as well. EDIT With the updated output from otool you can see that there is a mismatch..
Creating a singleton in python http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python for calling the method that returns the stored instance. With a metaclass it will only be called once when the only instance..
http://stackoverflow.com/questions/743164/do-while-loop-in-python Does that seem like something close to what you would want With your code example it would be for s in some_list while True..
http://stackoverflow.com/questions/7933596/django-dynamic-model-fields is a PostgreSQL backend which makes use of hstore module. With it you can have a DictionaryField which stores editable and..
http://stackoverflow.com/questions/960969/python-comet-server docs of Cometd et al. For a start I'd read Getting Started With Comet and StreamHub download and see how some of the examples..
Pyparsing: extract variable length, variable content, variable whitespace substring http://stackoverflow.com/questions/10855951/pyparsing-extract-variable-length-variable-content-variable-whitespace-substr PROSTATECTOMY ADENOCARCINOMA. GLEASON SCORE 3 3 6 WITH TERTIARY PATTERN OF 5. TUMOR QUANTITATION APPROXIMATELY..
http://stackoverflow.com/questions/16467479/normalizing-unicode A' 'COMBINING ACUTE ACCENT' to 'LATIN SMALL LETTER A WITH ACUTE' See where is the problem import unicodedata char 獺 len.. 1 unicodedata.name c for c in char 'LATIN SMALL LETTER A WITH ACUTE' But now char a len char 2 unicodedata.name c for c in..
python… encoding issue when using linux > [duplicate] http://stackoverflow.com/questions/17430168/python-encoding-issue-when-using-linux u R疇bjerg # unicodedata.name u 疇 'LATIN SMALL LETTER A WITH RING ABOVE' here is what i get when i use it from a debian command.. s u R疇bjerg # unicodedata.name u 疇 'LATIN SMALL LETTER A WITH RING ABOVE' if sys.stdout.encoding is None # if it is a pipe..
http://stackoverflow.com/questions/1766669/python-unicodedecodeerror answer unicodedata.name u' u0161' 'LATIN SMALL LETTER S WITH CARON' 16 That example shows what happens when the character..
SQLite, python, unicode, and non-utf data http://stackoverflow.com/questions/2392732/sqlite-python-unicode-and-non-utf-data unicodedata.name oacute_unicode 'LATIN SMALL LETTER O WITH ACUTE' print repr oacute_utf8 ' xc3 xb3' If you send oacute_utf8..
Creating a JSON response using Django and Python http://stackoverflow.com/questions/2428092/creating-a-json-response-using-django-and-python '.json_encode arrayToJs .' ' RETURN ARRAY WITH success else for x 0 x 1000000 x if x 990000 arrayToJs 2 false.. '.json_encode arrayToJs .' ' RETURNS ARRAY WITH ERROR. And this is the converted code def validate_user request..
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 'cp437' ud.name u' xe9' 'LATIN SMALL LETTER E WITH ACUTE' ud.name ' xe9'.decode 'cp437' 'GREEK CAPITAL LETTER THETA'.. unicodedata as ud ud.name u' xe9' 'LATIN SMALL LETTER E WITH ACUTE' ' xe9'.decode 'cp437' u' u0398' ud.name u' u0398' 'GREEK..
http://stackoverflow.com/questions/2930673/python-and-csv-help #SEARCH ON HOSTNAME AND RETURN UID #REPLACE VALUE IN FILE WITH UID #import fileinput #for line in fileinput.FileInput filetoreplace..
Use binary COPY table FROM with psycopg2 http://stackoverflow.com/questions/8144002/use-binary-copy-table-from-with-psycopg2 cpy.seek 0 curs.copy_expert COPY num_data FROM STDIN WITH BINARY cpy # Update sequence on database curs.execute SELECT.. s0 real s1 real s2 real s3 real s4 real s5 real s6 real WITH OIDS FALSE and another similar table named num_data_text . Here.. 0 if binary curs.copy_expert 'COPY ' table ' FROM STDIN WITH BINARY' cpy else # text curs.copy_from cpy table conn.commit..
simple thread management within python classes http://stackoverflow.com/questions/8454140/simple-thread-management-within-python-classes to do this i would have to import echo from print_text the WITH way of doing things suggests putting an __enter__ and __exit__..
Creating a logging handler to connect to Oracle? http://stackoverflow.com/questions/935930/creating-a-logging-handler-to-connect-to-oracle prior permission. # VINAY SAJIP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING # ALL IMPLIED WARRANTIES OF.. OR OTHER TORTIOUS ACTION ARISING OUT # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. # # This file is part..
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