| from typing import Protocol, List | |
| class Template(Protocol): | |
| name: str # This is a protocol member | |
| value: int = 0 # This one too (with default) | |
| def method(self) -> None: | |
| self.temp: List[int] = [] # Error in type checker | |
| class Concrete: | |
| def __init__(self, name: str, value: int) -> None: | |
| self.name = name | |
| self.value = value | |
| def method(self) -> None: | |
| return | |
| var: Template = Concrete('value', 42) # OK | |