Created
March 18, 2022 04:57
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| from typing import Protocol, TypeVar, Generic, Any | |
| T = TypeVar('T') | |
| class Proxy(Generic[T]): | |
| def __init__(self, proxied: T) -> None: | |
| self._proxied = proxied | |
| def __getattr__(self, item: str) -> Any: | |
| return getattr(self._proxied, item) | |
| class Client(Protocol): | |
| def do_something(self) -> None: | |
| ... | |
| def do_another_thing(self) -> None: | |
| ... | |
| class InnerClient: | |
| def do_something(self) -> None: | |
| print("InnerClient.do_something") | |
| def do_another_thing(self) -> None: | |
| print("InnerClient.do_another_thing") | |
| class OuterClient1(Proxy[Client]): | |
| def do_something(self) -> None: | |
| print("OuterClient1.do_something") | |
| self._proxied.do_something() | |
| class OuterClient2(Proxy[Client]): | |
| def __init__(self, client: Client, num: int): | |
| super().__init__(client) | |
| self._num = num | |
| def do_another_thing(self) -> None: | |
| print(f"OuterClient2.do_another_thing {self._num}") | |
| self._proxied.do_another_thing() | |
| def main() -> None: | |
| inner_client: Client = InnerClient() | |
| outer_client_1: Client = OuterClient1(inner_client) | |
| outer_client_2: Client = OuterClient2(outer_client_1, 42) | |
| outer_client_2.do_something() | |
| outer_client_2.do_another_thing() | |
| if __name__ == "__main__": | |
| main() |
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