What's the canonical way to check for type in Python?

Question

What is the best way to check whether a given object is of a given type? How about checking whether the object inherits from a given type?

Let\'s say I have an objec

Answer 1

For more complex type validations I like typeguard's approach of validating based on python type hint annotations:

from typeguard import check_type
from typing import List

try:
    check_type('mylist', [1, 2], List[int])
except TypeError as e:
    print(e)

You can perform very complex validations in very clean and readable fashion.

check_type('foo', [1, 3.14], List[Union[int, float]])
# vs
isinstance(foo, list) and all(isinstance(a, (int, float)) for a in foo)