Antoine Pitrou added the comment:

The format code space is already crowded, and it isn't immediately obvious that 
'08B' will format the 2's complement representation of the number, as opposed 
to '08b' which prepends a sign bit.  Not to mention that, as Raymond remarked, 
we cannot use the same convention for hex formatting where 'X' already has a 
different meaning.

Instead, how about adding an optional argument to bin()?  And then we can also 
do the same for hex().

By the way, I do find annoying the default behaviour of prepending a sign bit 
on hexadecimal and binary displays (but I never use binary displays, so my 
annoyance is really with hexadecimal displays).

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nosy: +pitrou

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue30571>
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