Constrained TypeVars with Any default

Bug Report

In python/typeshed#13683 I'm trying to change a type var to the following:

_I = TypeVar("_I", int, bytes, float, bool, default=Any)  # possibly memoryview types

Unfortunately, mypy complains: error: TypeVar default must be one of the constraint types [misc]. While this is of course generally sound advice, a default of Any should always be permissible, as this allows memoryview to stand for any possible memoryview type. Without it, users are forced to write memoryview[Any] in every instance, which is unreasonable.

Your Environment

• Mypy version used: 1.18.2

Reproduce la declaración de TypeVar informada y el error «TypeVar default must be one of the constraint types» usando mypy 1.18.2. Empieza por localizar la validación de los valores predeterminados de TypeVar con restricciones; se considera terminado cuando se acepta un valor predeterminado de Any para este caso sin debilitar las demás comprobaciones de valores predeterminados.