python Programming Glossary: singletons

Why does a python module act like a singleton?

http://stackoverflow.com/questions/10936709/why-does-a-python-module-act-like-a-singleton

are first class runtime objects they effectively become singletons initialized at the time of first import. Note that this means..

Python's in (__contains__) operator returns a bool whose value is neither True nor False

http://stackoverflow.com/questions/19751556/pythons-in-contains-operator-returns-a-bool-whose-value-is-neither-true-n

use parenthesis and the is operator True and False are singletons just like None 1 in is False True This gets more confusing still..

why defined '__new__' and '__init__' all in a class

http://stackoverflow.com/questions/2017876/why-defined-new-and-init-all-in-a-class

is delegated to type.__new__ an existing one to implement singletons recycle instances from a pool and so on or even one that's not..

Python != operation vs “is not”

http://stackoverflow.com/questions/2209755/python-operation-vs-is-not

influence the is operation. You use is and is not for singletons like None where you don't care about objects that might want..

Are strings pooled in Python

http://stackoverflow.com/questions/2519580/are-strings-pooled-in-python

Python have a pool of all strings and are they strings singletons there More precise in the following code one or two strings..

Python `if x is not None` or `if not x is None`?

http://stackoverflow.com/questions/2710940/python-if-x-is-not-none-or-if-not-x-is-none

to any singleton rather than just None . ...to compare singletons like None. Use is or is not. python coding style boolean expression..

How to adapt the Singleton pattern? (Deprecation warning)

http://stackoverflow.com/questions/6264025/how-to-adapt-the-singleton-pattern-deprecation-warning

you'll be fine with the first diamond inheritance and singletons sound as though they shouldn't be mixed . P.S. I did try this..

Creating a singleton in python

http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python

astonishment' I have multiple classes which would become singletons my use case is for a logger but this is not important . I do.. the singleton class definitions in other ways. Your singletons won't need multiple inheritance because the metaclass is not.. class and subclasses need not be aware that they are singletons . Method #1 fails this test as you noted with MyClass itself..

Is there a good way to do this type of mining?

http://stackoverflow.com/questions/7076349/is-there-a-good-way-to-do-this-type-of-mining

by scanning each row as described above and then grouping singletons vertically. Analytic solution OK cool. At this point we have..

Is there a simple, elegant way to define Singletons in Python? [closed]

http://stackoverflow.com/questions/31875/is-there-a-simple-elegant-way-to-define-singletons-in-python

there a simple elegant way to define Singletons in Python closed There seem to be many ways to define Singletons.. in Python closed There seem to be many ways to define Singletons in Python. Is there a consensus opinion on StackOverflow python..

Python and the Singleton Pattern [duplicate]

http://stackoverflow.com/questions/42558/python-and-the-singleton-pattern

Possible Duplicate Is there a simple elegant way to define Singletons in Python What is the best way to implement the singleton pattern..

How to adapt the Singleton pattern? (Deprecation warning)

http://stackoverflow.com/questions/6264025/how-to-adapt-the-singleton-pattern-deprecation-warning

in question Is there a simple elegant way to define Singletons in Python I use the Singleton via sub classing class Settings.. another example in Is there a simple elegant way to define Singletons in Python but at a glance it probably will have the same problem...

Creating a singleton in python

http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python

To me logging has always seemed a natural candidate for Singletons. You're absolutely right . When people say singletons are bad.. it is very slippery slope. Therefore I am against these Singletons too not because they are bad but because it is very easy for.. enumeration you are OK so please don't. The other kind of Singletons which are semi acceptable are those which don't effect the execution..