Python 3.10+typingfunction

typing.is_typeddict

introspection

Check whether an object is a TypedDict.

Syntax

typing.is_typeddict(tp)

It exists because neither isinstance nor issubclass work with TypedDict, and at runtime a TypedDict instance is just a plain dict, indistinguishable from any other. The function recognises the type object itself, not an instance: is_typeddict(TD) is True, but is_typeddict({'x': 1}) is False. Available since Python 3.10.

Examples

from typing import TypedDict, is_typeddict
class TD(TypedDict):
    x: int
print(is_typeddict(TD))   # → True

See also

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