[issue3187] os.listdir can return byte strings

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

Le vendredi 03 octobre 2008 à 11:43 +0000, STINNER Victor a écrit :
> STINNER Victor <victor.stinner at haypocalc.com> added the comment:
> 
> > The most generic way of allowing all bytes-alike objects is to write:
> >     path = bytes(path)
> 
> If you use that, any unicode may fails and the function will always return 
> unicode. The goal is to get:
>   func(bytes)->bytes
>   func(bytearray)->bytes (or maybe bytearray, it doesn't matter)
>   func(unicode)->unicode

Then make it:

    path = path if isinstance(path, str) else bytes(path)

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3187>
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