On Wed, 10 Oct 2007 12:39:24 +0200, Ramon Crehuet wrote:
> def require_int(func):
> def wrapper(arg):
> assert isinstance(arg, int)
> return func(arg)
> return wrapper
> p1(a):
> print a
>
> p2=require_int(p1)
>
> My question is: why do p2 arguments become wrapper arguments? What is
> the flux of the arguments in the program when you pass functions as
> arguments?
The function `p1` is passed into `require_int`. It is bound to the local
name `func` in `require_int`. Everytime `require_int` is called a new
function object is created and bound to the local name `wrapper`. The
name `func` in that new function object refers to the object bound to
`func` in the `require_int` namespace. Then the new function is returned
still carrying a reference to the `func` object that was passed into
`require_int`.
Ciao,
Marc 'Blackjack' Rintsch
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