| from __future__ import annotations | |
| from typing import Callable | |
| from mypy.plugin import FunctionSigContext, Plugin | |
| from mypy.types import CallableType | |
| class FunctionSigPlugin(Plugin): | |
| def get_function_signature_hook( | |
| self, fullname: str | |
| ) -> Callable[[FunctionSigContext], CallableType] | None: | |
| if fullname == "__main__.dynamic_signature": | |
| return my_hook | |
| return None | |
| def my_hook(ctx: FunctionSigContext) -> CallableType: | |
| arg1_args = ctx.args[0] | |
| if len(arg1_args) != 1: | |
| return ctx.default_signature | |
| arg1_type = ctx.api.get_expression_type(arg1_args[0]) | |
| return ctx.default_signature.copy_modified(arg_types=[arg1_type], ret_type=arg1_type) | |
| def plugin(version: str) -> type[FunctionSigPlugin]: | |
| return FunctionSigPlugin |