IntEnum "is not indexable"

[alexmv]

from enum import IntEnum
Color = IntEnum('Color', 'red green blue')
Color['green']

...yields:

test.py:3: error: Value of type "Type[Color]" is not indexable

This example is more or less straight out of the enum docs -- my expectation is that it should not be a type error.

Mypy version 025e3de

[ilevkivskyi]

Note that this problem is absent for a simple Enum. Also IntEnum fails the following code:

for c in Color:  # E: not iterable
    reveal_type(c)

I thought this should be fixed by #4319 @elazarg what do you think?

[elazarg]

It only happens for functional api of non-Enum enums. I will look into it.

[aalvrz]

I am experiencing this with mypy==0.780, with similar errors:

"IntEnum" not callable
"IntEnum" is not indexable

When doing:

val = self.enum_class(value)
val = self.enum_class[value.upper()]