[Python-ideas] PEP for enum library type?

[Tim Delaney]

On 13 February 2013 07:13, Tim Delaney <timothy.c.delaney at gmail.com> wrote:

> Well, that particular case would work (you'd get a NameError: sys) due to
> having done an attribute lookup on sys, but the following:
>
> class Color(Enum):
>     RED, GREEN, BLUE
>     if platfor == 'win32':
>         MAGENTA
>
> would create an enum value 'platfor'.
>

BTW, I've just addressed this in my latest version up on BitBucket. Any
usage of an object that is more than just assignment (basically, anything
that results in a call of a __dunder__ method on the object) will now mark
the name as not an enum value and result in a NameError for an unknown name.

Python 3.3.0 (v3.3.0:bd8afb90ebf2, Sep 29 2012, 10:57:17) [MSC v.1600 64
bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from enum import Enum
>>> class Color(Enum):
...     RED
...     if unknown_name == 'value':
...         PINK
...
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in Color
  File ".\enum.py", line 123, in __eq__
    def __eq__(self, other): return self._get(True) == other
  File ".\enum.py", line 98, in _get
    raise NameError(self.key)
NameError: unknown_name

Tim Delaney
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