[issue19995] hex() and %x, oct() and %o do not behave the same

[Ethan Furman]

Ethan Furman added the comment:

Antoine, if I understand you correctly, you are saying that any type that defines __index__ is an integer, and should therefore also define __int__, in which case Python can just use __int__ and not worry about __index__?

Here's the problem with that:

  --> '%x' % 3.14
  '3'

While I am beginning to agree that an integer type needs to implement both __int__ and __index__, it still remains true that Python needs to call __index__ if what it needs is already a real, true int, and not just something that can be truncated or otherwise converted into an int -- such as float.

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<http://bugs.python.org/issue19995>
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