typing.TypedDict

Python 3.8〜

Special construct to add type hints to a dictionary. At runtime it is a plain dict.

型チェックを追加した辞書という理解

例

code: python

class Point2D(TypedDict):

x: int

y: int

label: str

# 初期化する方法2通り

a = {'x': 1, 'y': 2, 'label': 'good'}

b = Point2D(x=1, y=2, label='first')

オプションのキー

class DicthasOptionalKey(RequiredKeysTypedDict, total=False)

The functional syntax should also be used when any of the keys are not valid identifiers, for example because they are keywords or contain hyphens.

Point2D = TypedDict('Point2D', {'in': int, 'x-y': int})