Is there a simpler way to modify all arguments in a function before using the arguments?

Aahz aahz at pythoncraft.com
Sat Nov 10 16:35:11 CET 2012


In article <mailman.3530.1352538537.27098.python-list at python.org>,
Peter Otten  <__peter__ at web.de> wrote:
>Miki Tebeka wrote:
>
>>> Is there a simpler way to modify all arguments in a function before using
>>> the arguments?
>>
>> You can use a decorator:
>> 
>> from functools import wraps
>> 
>> def fix_args(fn):
>>     @wraps(fn)
>>     def wrapper(*args):
>>         args = (arg.replace('_', '') for arg in args)
>>         return fn(*args)
>> 
>>     return wrapper
>> 
>> @fix_args
>> def foo(x, y):
>>     print(x)
>>     print(y)
>
>I was tempted to post that myself, but he said /simpler/ ;)

>From my POV, that *is* simpler.  When you change the parameters for foo,
you don't need to change the arg pre-processing.  Also allows code reuse,
probably any program needing this kind of processing once will need it
again.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"....Normal is what cuts off your sixth finger and your tail..."  --Siobhan


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