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Dynamic Finders and Method Missing in Python
I know you can do this in Ruby, but how would it be done in Python?
So basically you could maybe to a regex on the method call that didn't exist, and create 'syntactic sugar'.
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2http://stackoverflow.com/questions/913020/dynamic-finders-and-method-missing-in-python – ameer Nov 10 '10 at 15:13
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@ameer: Thanks for finding that. Voting to close as duplicate. – Björn Pollex Nov 10 '10 at 15:16
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But that still won't make s./.*/ valid syntax, if that's what you have in mind. Python's syntax is nowhere as bendable as Ruby's.
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2You can't *add* to Python's syntax. Nonstandard syntax sugar is mostly good for preventing other people from understanding your code. – Glenn Maynard Nov 10 '10 at 15:30
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@Blankman: No. Python wants to be simple and not Perl-like, so its grammar is mich simpler than Ruby's. – Philipp Nov 10 '10 at 15:41
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You can override __getattribute__ on an object to handle requests for attributes that do not exist. This only works for new-style classes. If you have old-style classes, you can use delnans answer.
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1Terminology nitpicking: There is no overloading (as in http://en.wikipedia.org/wiki/Method_overloading) in Python or in Ruby. Only overriding. – Nov 10 '10 at 15:11
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2`__getattribute__` is called on *all* attribute lookups. delnan's answer is correct for both new and old-style classes. – Glenn Maynard Nov 10 '10 at 15:27
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You confused me :) I thought that (correctly, as @Glenn suggests and the docs confirm) that `__getattr__` is called for missing attributes/methods (as the question asks) while `__getattribute__` is used *always* when defined. – Nov 10 '10 at 15:30