Client Initialization Best Practices (Python)

Core Rules

• Client is thread-safe — safe to share across threads without additional locking.
• Use singleton pattern — do NOT create new client instances per request. Frequent client creation wastes resources.
• Prefer explicit endpoint over region-based endpoint resolution.

Recommended Client Creation

import os
from threading import Lock
from alibabacloud_tea_openapi.models import Config
from alibabacloud_ecs20140526.client import Client as EcsClient

_client = None
_lock = Lock()