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python Programming Glossary: changedCommon pitfalls in Python [duplicate] http://stackoverflow.com/questions/1011431/common-pitfalls-in-python It implies two big hazards If the class attribute is changed then the initial value is changed. If you set a mutable object.. the class attribute is changed then the initial value is changed. If you set a mutable object as a default value you'll get the..
http://stackoverflow.com/questions/1151658/python-hashable-dicts I don't intend to expose the interface to allow them to be changed so either mutable or immutable collections are fine The problem..
How can I quantify difference between two images? http://stackoverflow.com/questions/189943/how-can-i-quantify-difference-between-two-images of like a time lapse thing. However if nothing has really changed that is the picture pretty much looks the same I don't want.. not equal to zero to measure how much the image has changed. The former will tell you how much the image is off the latter..
How to get file creation & modification date/times in Python? http://stackoverflow.com/questions/237079/how-to-get-file-creation-modification-date-times-in-python on nix systems but rather the last time the inode data changed. thanks to kojiro for making that fact more clear in the comments..
Unexpected feature in a Python list of lists http://stackoverflow.com/questions/240178/unexpected-feature-in-a-python-list-of-lists 3 The list looked like this 1 1 1 1 1 1 1 1 1 1 1 1 Then I changed one of the innermost values myList 0 0 5 Now my list looks like.. to x . When you then change x all three references are changed. To fix it you need to make sure that you create a new list..
http://stackoverflow.com/questions/247770/retrieving-python-module-path python module path I want to detect whether module has changed. Now using inotify is simple you just need to know the directory..
DatabaseError: current transaction is aborted, commands ignored until end of transaction block http://stackoverflow.com/questions/2979369/databaseerror-current-transaction-is-aborted-commands-ignored-until-end-of-tra commands ignored until end of transaction block after changed from python psycopg to python psycopg2 as Django project's database..
String comparison in Python: is vs. == [duplicate] http://stackoverflow.com/questions/2988017/string-comparison-in-python-is-vs debugger it turned out that line was in fact '' . When I changed it to '' rather than is not '' it worked fine. I did some searching..
Remove specific characters from a string in python http://stackoverflow.com/questions/3939361/remove-specific-characters-from-a-string-in-python this question Strings in python are immutable can't be changed . Because of this the effect of line.replace ... is just to..
How do I unload (reload) a Python module? http://stackoverflow.com/questions/437589/how-do-i-unload-reload-a-python-module the server. What's the best way do do this if foo.py has changed unimport foo How do I do this import foo myfoo foo.Foo python.. function import foo while True # Do some things. if is_changed foo foo reload foo I think that this is what you want. Web servers.. in the module namespace are updated to point to any new or changed objects. Other references to the old objects such as names external..
How to print in Python without newline or space? http://stackoverflow.com/questions/493386/how-to-print-in-python-without-newline-or-space Please note that in Python 3 the print statement has been changed into a function so the second example will no longer work. In..
Understanding Python super() and init methods http://stackoverflow.com/questions/576169/understanding-python-super-and-init-methods on super if you haven't already. Edit Note that the syntax changed in Python 3.0 you can just say super .__init__ instead of super..
http://stackoverflow.com/questions/5957341/python-list-confusion modified but actually the first element of each list was changed 23 0 0 0 0 0 0 0 0 0 23 0 0 0 0 0 0 0 0 0 23 0 0 0 0 0 0 0 0.. but why is this happening Why isn't just the first list changed When I do the second 10 does Python actually copy the first..
Use numpy array in shared memory for multiprocessing http://stackoverflow.com/questions/7894791/use-numpy-array-in-shared-memory-for-multiprocessing p Process target f args a p.start p.join # Print out the changed values print Now the first two elements of arr s arr 2 This..
Python: How do I pass a variable by reference? http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference reference or value and the following code produces the unchanged value 'Original' class PassByReference def __init__ self self.variable.. print 'got' the_list the_list.append 'four' print 'changed to' the_list outer_list 'one' 'two' 'three' print 'before outer_list.. outer_list 'one' 'two' 'three' got 'one' 'two' 'three' changed to 'one' 'two' 'three' 'four' after outer_list 'one' 'two' 'three'..
Difference between the built-in pow() and math.pow() for floats, in Python? http://stackoverflow.com/questions/10282674/difference-between-the-built-in-pow-and-math-pow-for-floats-in-python integer then pow x y is undefined and raises ValueError. Changed in version 2.6 The outcome of 1 nan and nan 0 was undefined...
Find functions explicitly defined in a module (python) http://stackoverflow.com/questions/1106840/find-functions-explicitly-defined-in-a-module-python in inspect module n' list_functions inspect EDIT Changed variable names from 'meth' to 'func' to avoid confusion we're..
Fast comparison between two Python dictionary http://stackoverflow.com/questions/1165352/fast-comparison-between-two-python-dictionary set 'd' print Removed d.removed Removed set 'c' print Changed d.changed Changed set 'b' print Unchanged d.unchanged Unchanged.. Removed d.removed Removed set 'c' print Changed d.changed Changed set 'b' print Unchanged d.unchanged Unchanged set 'a' Available..
http://stackoverflow.com/questions/11957925/psycopg2-mapping-python-list-of-dicts-to-postgres-array-of-composite-type . I am sure it is possible since the documentation says Changed in version 2.4.3 added support for array of composite types..
Does, With open() not works with python 2.6 http://stackoverflow.com/questions/12138298/does-with-open-not-works-with-python-2-6 context managers though which was only added in Python 2.7 Changed in version 2.7 Support for multiple context expressions. Use..
detect new or modified files with python http://stackoverflow.com/questions/1618853/detect-new-or-modified-files-with-python gio.FILE_MONITOR_EVENT_DELETED print Changed file1 file2 evt_type gfile gio.File . monitor gfile.monitor_directory..
Base-2 (Binary) Representation Using Python http://stackoverflow.com/questions/187273/base-2-binary-representation-using-python x 0xff x 8 return sign ''.join reversed l .lstrip 0 Edit Changed code to handle signed integers. Edit2 Here are some timing figures..
Pythonic way to ignore for loop control variable http://stackoverflow.com/questions/1885868/pythonic-way-to-ignore-for-loop-control-variable the header before reading the rest of the file. Edit 2 Changed the question title from Pythonic way to read a set number of..
MySQL “incorrect string value” error when save unicode string in Django http://stackoverflow.com/questions/2108824/mysql-incorrect-string-value-error-when-save-unicode-string-in-django Query OK 1 row affected 1 warning 0.00 sec Rows matched 1 Changed 1 Warnings 0 mysql select last_name from auth_user where id..
Problem running Virtualenv on Mac OS X http://stackoverflow.com/questions/2355188/problem-running-virtualenv-on-mac-os-x trythis bin New python executable in trythis bin python Changed mode of trythis bin python to 0755 Symlinking trythis .Python..
python enumeration class for ORM purposes http://stackoverflow.com/questions/3588996/python-enumeration-class-for-orm-purposes 'metaclass ' no need to specify object as base class 1 Changed instance method into @classmethod now I don't need the object..
How to create a stock quote fetching app in python http://stackoverflow.com/questions/5081710/how-to-create-a-stock-quote-fetching-app-in-python import stockquote print stockquote.get_quote 'goog' Update Changed the regular expression to match Google Finance's latest format..
What is the official “preferred” way to install pip and virtualenv systemwide? http://stackoverflow.com/questions/5585875/what-is-the-official-preferred-way-to-install-pip-and-virtualenv-systemwide
Python wait x secs for a key and continue execution if not pressed http://stackoverflow.com/questions/6179537/python-wait-x-secs-for-a-key-and-continue-execution-if-not-pressed inp print Config selected... else print Timed out... Edit Changed the code samples so you could tell whether there was a timeout..
http://stackoverflow.com/questions/735975/static-methods-in-python in The standard type hierarchy . New in version 2.2. Changed in version 2.4 Function decorator syntax added. share improve..
Best way to convert a Unicode URL to ASCII (UTF-8 percent-escaped) in Python? http://stackoverflow.com/questions/804336/best-way-to-convert-a-unicode-url-to-ascii-utf-8-percent-escaped-in-python Fixed the case of already quoted characters in the string. Changed urlparse urlunparse to urlsplit urlunsplit . Don't encode user..
Making all possible combinations of a list in python http://stackoverflow.com/questions/8371887/making-all-possible-combinations-of-a-list-in-python list combinations share improve this question EDIT Changed algorithm for returning lists instead of tuples. Simply use..
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