.

报错分析

1.错误翻译

原文：API call failed after 3 retries: Connection error.
译文：API调用在3次重试后失败：连接错误。

2.原因分析

3.解决方案

import requests
from requests.adapters import HTTPAdapter
from urllib3.util.retry import Retry

def call_api(url, max_retries=3):
    session = requests.Session()
    retry_strategy = Retry(
        total=max_retries,
        backoff_factor=1,
        status_forcelist=[429, 500, 502, 503, 504],
        allowed_methods=["GET", "POST"]
    )
    adapter = HTTPAdapter(max_retries=retry_strategy)
    session.mount("http://", adapter)
    session.mount("https://", adapter)
    
    try:
        response = session.get(url, timeout=10)
        response.raise_for_status()
        return response.json()
    except requests.exceptions.ConnectionError as e:
        print(f"连接失败：{e}（请检查网络/API地址）")
    except Exception as e:
        print(f"错误：{e}")
    return None

# 使用示例
result = call_api("https://api.example.com/endpoint")

4. 预防措施