Enum questions.

[Marko Rauhamaa]

Rustom Mody <rustompmody at gmail.com>:

> Given the eg in the docs:
> from enum import Enum
> class Color(Enum):
>     red = 1
>     blue = 2
>     green = 3
>
>>>> Color(Color.red.value+1)
> <Color.blue: 2>

But:

   >>> class Color(enum.Enum):
   ...   red = 0xff0000
   ...   green = 0x00ff00
   ...   blue = 0x0000ff
   ...
   >>> Color(Color.red.value + 1)
   Traceback (most recent call last):
     File "<stdin>", line 1, in <module>
     File "/usr/lib64/python3.4/enum.py", line 222, in __call__
       return cls.__new__(cls, value)
     File "/usr/lib64/python3.4/enum.py", line 457, in __new__
       raise ValueError("%r is not a valid %s" % (value, cls.__name__))
   ValueError: 16711681 is not a valid Color

I take it that enums in Python are identifiers only. While you can
iterate over all enums (and the definition order is preserved), it is
simply a way to operate on *all* enums.

So the answer to the OP's question is: that feature is not supported.


Marko