| from mypy.plugin import CallableType, CheckerPluginInterface, MethodSigContext, Plugin | |
| from mypy.types import Instance, Type | |
| class MethodSigPlugin(Plugin): | |
| def get_method_signature_hook(self, fullname): | |
| # Ensure that all names are fully qualified | |
| assert not fullname.endswith(' of Foo') | |
| if fullname.startswith('__main__.Foo.'): | |
| return my_hook | |
| return None | |
| def _str_to_int(api: CheckerPluginInterface, typ: Type) -> Type: | |
| if isinstance(typ, Instance): | |
| if typ.type.fullname == 'builtins.str': | |
| return api.named_generic_type('builtins.int', []) | |
| elif typ.args: | |
| return typ.copy_modified(args=[_str_to_int(api, t) for t in typ.args]) | |
| return typ | |
| def my_hook(ctx: MethodSigContext) -> CallableType: | |
| return ctx.default_signature.copy_modified( | |
| arg_types=[_str_to_int(ctx.api, t) for t in ctx.default_signature.arg_types], | |
| ret_type=_str_to_int(ctx.api, ctx.default_signature.ret_type), | |
| ) | |
| def plugin(version): | |
| return MethodSigPlugin |