[Python-Dev] format and int subclasses (Was: format, int, and IntEnum)

[Serhiy Storchaka]

15.08.13 01:07, Ethan Furman написав(ла):
>  From http://bugs.python.org/issue18738:

Actually the problem not only in IntEnum, but in any in subclass.

Currently for empty format specifier int.__format__(x, '') returns 
str(x). But __str__ can be overloaded in a subclass. I think that for 
less surprising we can extend this behavior for format specifier with 
the width, the alignment and the fill character but without the type 
char. I.e. int.__format__(x. '_<10') should return same as 
format(str(x), '_<10').

The question remains what to do with the sign option. And with the '=' 
alignment.