python Programming Glossary: firstWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python Foo . Careful it's tricky. You write class Foo object first but the class object Foo is not created in memory yet. Python.. about it a method always receives the current instance as first parameter. Just like you have self for ordinary methods. Of..
http://stackoverflow.com/questions/15112125/if-x-or-y-or-z-blah I was wondering if there was a way to translate the first into Python. So say x 0 y 1 z 3 if x or y or z 0 Mylist.append.. expressions. The expression x or y 1 is treated as first a boolean test for x then if that is False the expression y.. lower precedence than the test so the latter is evaluated first . However even if this were not the case and the expression..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained time the for uses the generator. Now the hard part The first time the for calls the generator object created from your function.. the beginning until it hits yield then it'll return the first value of the loop. Then each other call will run the loop you..
http://stackoverflow.com/questions/2709821/python-self-explained be passed automatically but not received automatically the first parameter of methods is the instance the method is called on...
How do you split a list into evenly sized chunks in Python? http://stackoverflow.com/questions/312443/how-do-you-split-a-list-into-evenly-sized-chunks-in-python two lists and when the second list fills up add it to the first list and empty the second list for the next round of data but..
*args and **kwargs? [duplicate] http://stackoverflow.com/questions/3394835/args-and-kwargs named arguments too. The explicit arguments get values first and then everything else is passed to args and kwargs . The.. is passed to args and kwargs . The named arguments come first in the list. For example def table_things titlestring kwargs..
How can I represent an 'Enum' in Python? http://stackoverflow.com/questions/36932/how-can-i-represent-an-enum-in-python KeyError if the reverse mapping doesn't exist. With the first example Numbers.reverse_mapping 'three' 'THREE' share improve..
How to improve performance of this code? http://stackoverflow.com/questions/4295799/how-to-improve-performance-of-this-code is horribly slow I think. I'm not sure because this is my first program in python . The example run in the bottom of the code.. namedtuple trick and it performed in 0.2 sec for your first example and 2.1 sec for your second but I haven't tried verifying..
http://stackoverflow.com/questions/509211/pythons-slice-notation key point to remember is that the end value represents the first value that is not in the selected slice. So the difference beween..
Static class variables in Python http://stackoverflow.com/questions/68645/static-class-variables-in-python as the method then receives the class type as the first argument but I'm still a little fuzzy on the advantages of this..
Making a flat list out of list of lists in Python [duplicate] http://stackoverflow.com/questions/952914/making-a-flat-list-out-of-list-of-lists-in-python of generality say you have L sublists of I items each the first I items are copied back and forth L 1 times the second I items..
What is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python objects you can create them on the fly like any object. First you can create a class in a function using class def choose_class.. API to do the real job behind the scenes. The last word First you know that classes are objects that can create instances...
How to remove convexity defects in a Sudoku square? http://stackoverflow.com/questions/10196198/how-to-remove-convexity-defects-in-a-sudoku-square Mask All 2 largestComponent Image SortBy components First 1 2 By filling this image I get a mask for the sudoku grid mask..
Using numpy to build an array of all combinations of two arrays http://stackoverflow.com/questions/1208118/using-numpy-to-build-an-array-of-all-combinations-of-two-arrays array as input. What I tried to do initially was this 1 First I created a function that takes 2 arrays and generate an array..
Difference between __str__ and __repr__ in Python http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python Alex summarized well but surprisingly was too succinct. First let me reiterate the main points in Alex 䏭 post The default..
How to install MySQLdb (Python data access library to MySQL) on Mac OS X? http://stackoverflow.com/questions/1448429/how-to-install-mysqldb-python-data-access-library-to-mysql-on-mac-os-x but not to Lion which appears to require 64 bit MySQL First off the author still of MySQLdb says here that one of the most..
How to implement an efficient infinite generator of prime numbers in Python? http://stackoverflow.com/questions/2211990/how-to-implement-an-efficient-infinite-generator-of-prime-numbers-in-python So the answer cannot be as naive as Just do a Sieve . First of all you do not know how many consecutive primes will be consumed...
An executable Python app [closed] http://stackoverflow.com/questions/2933/an-executable-python-app release management share improve this question First you will need some GUI library with Python bindings and then..
How does Python's super() work with multiple inheritance? http://stackoverflow.com/questions/3277367/how-does-pythons-super-work-with-multiple-inheritance inheritance. For example if you have something like class First object def __init__ self print first class Second object def.. Second object def __init__ self print second class Third First Second def __init__ self super Third self .__init__ print that's.. attempts . But briefly in your example Third will call First.__init__ . For such simple situations Python will look for the..
Ternary conditional operator in Python http://stackoverflow.com/questions/394809/ternary-conditional-operator-in-python so keep that in mind. The syntax is a if test else b First test is evaluated then either a or b is returned based on the..
How to write the Fibonacci Sequence in Python http://stackoverflow.com/questions/494594/how-to-write-the-fibonacci-sequence-in-python between a range ie. startNumber 1 endNumber 20 displays First 20 Fibonacci numbers . I thought I had a sure fire code. I also..
Creating a singleton in python http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python problems stem from the class being it's own base class. First isn't it weird to have a class be a subclass of a nearly identical..
Rolling or sliding window iterator in Python http://stackoverflow.com/questions/6822725/rolling-or-sliding-window-iterator-in-python it iter seq win it.next for cnt in xrange window_size # First window yield win for e in it # Subsequent windows win 1 win..
http://stackoverflow.com/questions/7933596/django-dynamic-model-fields robust and tested in production relevant source code . First to implement this was Michael Hall . Yes this is magic with..
How do I convert local time to UTC in Python? http://stackoverflow.com/questions/79797/how-do-i-convert-local-time-to-utc-in-python time. python datetime utc share improve this question First parse the string into a naive datetime object. This is an instance..
http://stackoverflow.com/questions/886221/does-django-scale to take a stab at it using data from various locations. First we have a list of Django sites on the front page of the main..
Matching incorrectly spelt words with correct ones in python http://stackoverflow.com/questions/11563615/matching-incorrectly-spelt-words-with-correct-ones-in-python that need to match in the SMS correct for first word THE FIRST WORD correct for second word AND SECOND WORD SMS FIRST WORD.. THE FIRST WORD correct for second word AND SECOND WORD SMS FIRST WORD SECOND EDIT Ideally people should SMS the words comma seperated..
Error: AttributeError: Transaction instance has no attribute 'trans_handle' http://stackoverflow.com/questions/12781696/error-attributeerror-transaction-instance-has-no-attribute-trans-handle INTEGER NOT NULL COMPANY VARCHAR 50 LAST NAME VARCHAR 50 FIRST NAME VARCHAR 50 E MAIL ADDRESS VARCHAR 50 JOB TITLE VARCHAR.. INTEGER NOT NULL COMPANY VARCHAR 50 LAST NAME VARCHAR 50 FIRST NAME VARCHAR 50 E MAIL ADDRESS VARCHAR 50 JOB TITLE VARCHAR..
Connection error to Access database http://stackoverflow.com/questions/12800101/connection-error-to-access-database INTEGER NOT NULL COMPANY VARCHAR 50 LAST NAME VARCHAR 50 FIRST NAME VARCHAR 50 E MAIL ADDRESS VARCHAR 50 JOB TITLE VARCHAR..
Absolute import failing in subpackage that shadows a stdlib package name http://stackoverflow.com/questions/1959188/absolute-import-failing-in-subpackage-that-shadows-a-stdlib-package-name and that sys.path was picking up my current directory FIRST before looking in the standard library. share improve this..
I have a compiler error “not defined” although there is a definition http://stackoverflow.com/questions/5287702/i-have-a-compiler-error-not-defined-although-there-is-a-definition got for that question was wrong. I suspect that after your FIRST question width not defined in line for x in range width you..
python matplotlib colorbar setting tick formator/locator changes tick labels http://stackoverflow.com/questions/6485000/python-matplotlib-colorbar-setting-tick-formator-locator-changes-tick-labels the data. zi griddata x y z xi yi interp 'linear' ##### FIRST PLOT plt.figure CS plt.contour xi yi zi 25 cmap plt.cm.jet bar..
Unable to use easy_install to install Python modules http://stackoverflow.com/questions/7622562/unable-to-use-easy-install-to-install-python-modules site packages directory and any other sys.path directories FIRST. So I did this. I then reinstalled setuptools from the setuptools..
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