[Python-Dev] format, int, and IntEnum

Eric V. Smith eric at trueblade.com
Thu Aug 15 19:44:15 CEST 2013

On 08/15/2013 11:21 AM, Ethan Furman wrote:
> Given that the !r and !s format codes can be used to get the repr and
> str of an IntEnum, would it be acceptable to have IntEnum's __format__
> simply pass through to int's __format__?  And likewise with all mix-in
> classes?

That helps with str.format(), but not with built-in format(). There,
you'd have to explicitly call str() or repr():

>>> '{:10}'.format(True)
'         1'
>>> format(True, '10')
'         1'

>>> '{!s:10}'.format(True)
'True      '
>>> format(str(True), '10')
'True      '


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