is there a nmore pythonic way ?

[A. Lloyd Flanagan]

"shagshag13" <shagshag13 at yahoo.fr> wrote in message news:<3e6dbc5e$0$2688$626a54ce at news.free.fr>...
> hello,
> 
> i need to use module.function passed from command line, by now i use :
> 
> if __name__ == '__main__':
>  args = sys.argv[1:]
>  if len(args) == 0:

A zero-length string evaluates to false, so you can just:

if not sys.argv[1:]:

>   ## print help information and exit:
>   usage()
>   sys.exit(2)
> 
>  im = '.'.join(sys.argv[1].split('.')[:-1])
>  func = sys.argv[1].split('.')[-1:][0]

How about

pos = sys.argv[1].rfind('.')
im, func = sys.argv[1][:pos], sys.argv[1][pos+1:]

I don't know if that's more pythonic, but I found it a lot more
readable than using split and join in this case.

> 
>  exec("from %s import %s" % (im, func))
> 
> -> and then func()
> 
> is there a more correct way to do it ?
> 
> thanks,

You're welcome.  I'm hoping somebody will post a different solution I
haven't thought of :).