[Tutor] empty class methods
Brian van den Broek
broek at cc.umanitoba.ca
Wed Dec 14 20:37:17 CET 2005
david said unto the world upon 2005-12-14 05:39:
>
> class foo:
> def sayhi(self):
> print 'hello world'
> def saybye(self): ##is there any reason for this to be here?
> pass
>
> class bar(foo):
> def saybye(self):
> print 'bye now'
>
> class baz(foo):
> def saybye(self):
> print 'later tater'
>
Hi David,
as Kent pointed out, a baseclass hook method is a common use case.
When I do that I write it as follows:
class foo:
def saybye(self):
'''Hook method for subclasses to override'''
pass
which makes it abundantly clear :-)
The other reason I sometime use pass is if I've had a Big Design[1]
idea and want to put in stub methods before I lose the overall
picture. Then the pass is there just to make the code legal while the
existence of the method name reminds me I wanted to make an actual
method.
def a_method(self):
pass # FIXME stub
[1] Whether I ought give in to Big Design Ideas is, of course, a
separate question :-)
HTH,
Brian vdB
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