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

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On Thursday, November 15, 2012 11:16:08 PM UTC-5, Ethan Furman wrote:
> Emile van Sebille wrote:
> 
> 
> > 
> 
> >> Using a decorator works when named arguments are not used. When named 
> 
> >> arguments are used, unexpected keyword error is reported. Is there a 
> 
> >> simple fix?
> 
> > 
> 
> > Extend def wrapper(*args) to handle *kwargs as well
> 
> > 
> 
> > Emile
> 
> > 
> 
> >> Code:
> 
> >> -----
> 
> >>
> 
> >> from functools import wraps
> 
> >>
> 
> >> def fix_args(fn):
> 
> >>     @wraps(fn)
> 
> >>     def wrapper(*args):
> 
> so this line ^ becomes
> 
>         def wrapper(*args, **kwargs):
> 
> >>         args = (arg.replace('_', '') for arg in args)
> 
> and add a line
> 
>             for k, v in kwargs:
> 
>                 kwargs[k] = v.replace('_', '')
> 
> >>         return fn(*args)
> 
> and this line ^ becomes
> 
>             return fn(*args, **kwargs)
> 
> >>     return wrapper
> 
> 
> 
> ~Ethan~


Ethan,

I tried you code suggestions but got errors.
However, this works:

from functools import wraps

def fix_args(fn):
    @wraps(fn)
    def wrapper(*args, **kwargs): 
        args = (arg.replace('_', '') for arg in args)
        for kv in kwargs:
            kwargs[kv] = kwargs[kv].replace('_', '')         
        return fn(*args, **kwargs) 
    return wrapper
   
@fix_args
def foo(a1="", a2="", b1="", b2=""):
     print(a1)
     print(a2)
     print(b1)
     print(b2)
     print ""
     
    
     
foo ('a1a1_x', 'a2a2_x', 'b1b1_x', 'b2b2_____x')
foo (a1='a1a1_x', a2='a2a2_x', b1='b1b1_x', b2='b2b2_____x') 
foo ('a1a1_x', 'a2a2_x', b1='b1b1_x', b2='b2b2_____x') 

Bruce

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Thread

Is there a simpler way to modify all arguments in a function before using the arguments? bruceg113355@gmail.com - 2012-11-09 16:48 -0800
  Re: Is there a simpler way to modify all arguments in a function before using the arguments? Roy Smith <roy@panix.com> - 2012-11-09 20:05 -0500
    Re: Is there a simpler way to modify all arguments in a function before using the arguments? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-11-10 01:16 +0000
      Re: Is there a simpler way to modify all arguments in a function before using the arguments? bruceg113355@gmail.com - 2012-11-10 05:15 -0800
        Re: Is there a simpler way to modify all arguments in a function before using the arguments? Chris Angelico <rosuav@gmail.com> - 2012-11-11 05:33 +1100
  Re: Is there a simpler way to modify all arguments in a function before using the arguments? Paul Rubin <no.email@nospam.invalid> - 2012-11-09 18:52 -0800
    Re: Is there a simpler way to modify all arguments in a function before using the arguments? Chris Angelico <rosuav@gmail.com> - 2012-11-10 14:56 +1100
      Re: Is there a simpler way to modify all arguments in a function before using the arguments? Paul Rubin <no.email@nospam.invalid> - 2012-11-09 20:05 -0800
        Re: Is there a simpler way to modify all arguments in a function before using the arguments? Chris Angelico <rosuav@gmail.com> - 2012-11-10 20:19 +1100
  Re: Is there a simpler way to modify all arguments in a function before using the arguments? Miki Tebeka <miki.tebeka@gmail.com> - 2012-11-09 20:17 -0800
    Re: Is there a simpler way to modify all arguments in a function before using the arguments? Peter Otten <__peter__@web.de> - 2012-11-10 10:09 +0100
      Re: Is there a simpler way to modify all arguments in a function before using the arguments? aahz@pythoncraft.com (Aahz) - 2012-11-10 07:35 -0800
        Re: Is there a simpler way to modify all arguments in a function before using the arguments? bruceg113355@gmail.com - 2012-11-10 09:56 -0800
        Re: Is there a simpler way to modify all arguments in a function before using the arguments? Peter Otten <__peter__@web.de> - 2012-11-11 10:28 +0100
        Re: Is there a simpler way to modify all arguments in a function before using the arguments? brucegoodstein@gmail.com - 2012-11-15 15:20 -0800
          Re: Is there a simpler way to modify all arguments in a function before using the arguments? Emile van Sebille <emile@fenx.com> - 2012-11-15 16:03 -0800
          Re: Is there a simpler way to modify all arguments in a function before using the arguments? Ethan Furman <ethan@stoneleaf.us> - 2012-11-15 20:00 -0800
            Re: Is there a simpler way to modify all arguments in a function before using the arguments? bruceg113355@gmail.com - 2012-11-16 07:00 -0800
              Re: Is there a simpler way to modify all arguments in a function before using the arguments? Ethan Furman <ethan@stoneleaf.us> - 2012-11-16 13:30 -0800
            Re: Is there a simpler way to modify all arguments in a function before using the arguments? bruceg113355@gmail.com - 2012-11-16 07:00 -0800
  Re: Is there a simpler way to modify all arguments in a function before using the arguments? Steve Howell <showell30@yahoo.com> - 2012-11-11 09:45 -0800

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