Circular Import Issue Due to Import Reordering in Python 3.8

[myousefi]

Description

When using isort to organize imports in our project, we encountered a subtle issue where isort's reordering of import statements introduced a circular import problem in Python versions 3.8.19. This issue arises specifically in our simulation engine module, where the order of imports is crucial to avoid circular dependencies.

Environment

• Python Version: 3.8
• isort Version: 5.13.2

Minimal Working Example (MWE)

simulation.py

from __future__ import annotations
from .replication_manager import ReplicationManager

class Simulation:
    pass

replication_manager.py

from __future__ import annotations
from .simulation import Simulation

class ReplicationManager:
    def __init__(self, simulation: Simulation):
        self.simulation = simulation

init.py

from .simulation import Simulation
from .replication_manager import ReplicationManager

__all__ = ["Simulation", "ReplicationManager"]

In this example, running isort would reorder the imports in the init file a way that introduces a circular dependency between simulation.py and replication_manager.py.