Observer on a Market-Data Bus

Difficulty

Asked at Hudson River Trading

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Available in Python and C++. You are solving it in Python. Switch to C++

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Language:

Python 3.12 C++23

Bus

from collections.abc import Callable
from typing import Any


class Bus:
    """..."""

    def __init__(self) -> None:
        # ...
        pass

    def subscribe(self, name: str, callback: Callable[[Any], object]) -> None:
        # ...
        pass

    def unsubscribe(self, name: str) -> bool:
        # ...
        pass

    def publish(self, tick: Any) -> int:
        # ...
        pass

    def subscribers(self) -> list[str]:
        # ...
        pass

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Observer on a Market-Data Bus

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