On 1/16/2014 8:41 AM, Brett Cannon wrote:
That's a very good catch, Michael! I think that makes sense if there
is precedence. Unfortunately that bit from the PEP never made it into
the documentation so I'm not sure if there is a
backwards-compatibility worry.
No. If __format__ is called with bytes format, and returns str, there
would be an exception generated on the spot.
If __format__ is called with bytes format, and tries to use it as str,
there would be an exception generated on the spot.
Prior to 3.whenever-this-is-implemented, Python 3 only provides str
formats to __format__, right? So new code is required to pass bytes to
__format__.
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