如何使用urllib3.Retry？

import urllib3
from urllib3.util.retry import Retry

retry = Retry(
    total=5,  # 最大重试次数
    backoff_factor=0.1,  # 重试之间的时间间隔因子
    status_forcelist=[500, 502, 503, 504],  # 触发重试的HTTP状态码
    method_whitelist=["GET", "POST"]  # 允许重试的HTTP方法
)

http = urllib3.PoolManager(retries=retry)

try:
    response = http.request("GET", "http://example.com")
    print(response.data)
except urllib3.exceptions.MaxRetryError as e:
    print("请求失败：", e)