[issue18738] String formatting (% and str.format) issues with Enum

[Eric V. Smith]

Eric V. Smith added the comment:

If IntEnum.__format__ is going to parse the format string, it's a little fragile. For example, say we modify int.__format__ to understand a "Z" presentation type. Who's going to remember to update IntEnum.__format__?

For reference, the existing integer formats are: "bdoxXn".

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18738>
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