mypy: type[list[Any]]" has no attribute "__iter__" (not iterable)

Question

I have the following code:

from pydantic import BaseModel


class Worker(BaseModel):
    id: int
    name: str
    status: bool = True


class WorkerList(BaseModel):
    workers = list[Worker]

    def deactivate_worker(self, worker: Worker) -> None:
        for w in self.workers:
            if w.id == worker.id:
                w.status = False
                break
        raise ValueError(
            f"Cannot deactivate worker {worker.id}: Value doesn't exist"
        )

My code is really simple: I just want to have a function that changes the status of a Bool element (Worker) to False.

mypy is highlighting self.workers and giving me: mypy: type[list[Any]]" has no attribute "__iter__" (not iterable)

What is the right way to deal with this?

Answer 1

As user2357112 already noted, you've used the annotation falsely as an assignment.

from typing import List

from pydantic import BaseModel


class Worker(BaseModel):
    id: int
    name: str
    status: bool = True


class WorkerList(BaseModel):
    workers: List[Worker] = []

    def deactivate_worker(self, worker: Worker) -> None:
        for w in self.workers:
            if w.id == worker.id:
                w.status = False
                break
        raise ValueError(f"Cannot deactivate worker {worker.id}: Value doesn't exist")