How to dynamic insert more conditional statements into a function

Gabriel Genellina gagsl-py2 at
Wed Mar 10 07:35:12 CET 2010

En Tue, 09 Mar 2010 18:48:42 -0300, Shane <shengcer at> escribió:

> Hi I am a newbie for Python
> Here is a question, say I have a list L,
> function foo is:
> def foo(L):
>     if L[0] > 0: return True
> if later I want another function goo which returns "True" when L[0]
> and L[1] are both > 0, i.e.,
> def goo(L):
>     if L[0] > 0 and L[1] > 0: return True
> Can anybody tell me how can I write the function "goo" based upon the
> function "foo"? Thanks!
> I know if it is implementable, I should use "decorator". But I just
> cannot figure out how.

To implement goo based on foo:

def goo(L):
   if foo(L) and L[1]>0: return True

I don't see how to use a decorator here - maybe your example became too  
simple to be useful. A more realistic use case?

Gabriel Genellina

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