What's the type hint for an array?

Question

For most collections we can do:

from typing import List, Tuple, etc

Is there a hint for array? As in:

arr = array.array('i')

Answer 1

As Carcigenicate pointed out, you can use array.array directly as a type annotation. However, you can't use array.array[int] or array.array[float] to specify the type of the elements.

If you need to do this, my suggestion is to use MutableSequence from collections.abc, since arrays implement all of the necessary operations: __len__, __getitem__, __setitem__, __contains__, __iter__, etc.

from collections.abc import MutableSequence

arr: MutableSequence[float] = array.array('f')