Function _paramspec_subst

Lib/typing.py:1135–1141

(self, arg)

def _paramspec_subst(self, arg):
    if isinstance(arg, (list, tuple)):
        arg = tuple(_type_check(a, "Expected a type.") for a in arg)
    elif not _is_param_expr(arg):
        raise TypeError(f"Expected a list of types, an ellipsis, "
                        f"ParamSpec, or Concatenate. Got {arg}")
    return arg


def _paramspec_prepare_subst(self, alias, args):