Enum questions.
Marko Rauhamaa
marko at pacujo.net
Wed Apr 13 06:58:10 EDT 2016
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
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