pip._vendor.typing_extensions.NewType Class Reference

Public Member Functions
	__call__ (self, obj)
	__init__ (self, name, tp)
	__mro_entries__ (self, bases)
	__repr__ (self)
	__reduce__ (self)
	__or__ (self, other)
	__ror__ (self, other)

Detailed Description

NewType creates simple unique types with almost zero
runtime overhead. NewType(name, tp) is considered a subtype of tp
by static type checkers. At runtime, NewType(name, tp) returns
a dummy callable that simply returns its argument. Usage::
    UserId = NewType('UserId', int)
    def name_by_id(user_id: UserId) -> str:
        ...
    UserId('user')          # Fails type check
    name_by_id(42)          # Fails type check
    name_by_id(UserId(42))  # OK
    num = UserId(5) + 1     # type: int

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The documentation for this class was generated from the following file:

• docs/help/help-venv/lib/python3.12/site-packages/pip/_vendor/typing_extensions.py