python-delayed-import

delayed_import.py

from functools import cache
from typing import TYPE_CHECKING, Optional

@cache
def delayed_import_once():
    global queue 
    import queue

if TYPE_CHECKING:
    import queue 


def needs_queue(maybe_queue: "Optional[queue.Queue]" = None) -> "queue.Queue":
    delayed_import_once()
    return queue.Queue(4) if not maybe_queue else maybe_queue

needs_queue()