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RE: Capitalization for variable that holds a class

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  RE: Capitalization for variable that holds a class "Prasad, Ramit" <ramit.prasad@jpmorgan.com> - 2012-09-27 17:20 +0000

#30316 — RE: Capitalization for variable that holds a class

Dennis Lee Bieber wrote:
> Sent: Sunday, September 23, 2012 11:53 AM
> To: python-list@python.org
> Subject: Re: Capitalization for variable that holds a class
> 
> On Sun, 23 Sep 2012 16:48:38 +0100, Joshua Landau
> <joshua.landau.ws@gmail.com> declaimed the following in
> gmane.comp.python.general:
> 
> > Simple question:
> >
> > [myClass() for myClass in myClasses]
> > vs
> > [MyClass() for MyClass in myClasses]
> >
> 
> 	The recommended naming scheme for Python is that class DEFINITIONS
> begin capitalized. Instances, methods/attributes, functions begin
> lowercase.
> 
> 	I abstain from the argument about camel-case vs _ (Ada "pretty
> printers" automatically capitalize at _, so _ is common in Ada)
> 
> class MyClass(object):
> 	def myMethod(self):

Are you (the OP) using Python 2 or 3? In python 2 list
comprehensions leak; if you use MyClass as the list
comprehension variable name it will overwrite the
MyClass class definition (if it exists).

>>> class MyClass(object):
...     pass
...     
>>> print MyClass
<class '__pieshell__.MyClass'>
>>> _ = [ MyClass for MyClass in xrange( 5 ) ]
>>> print MyClass
4


Ramit


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