直到“requests”库支持指数退避的自动重试

您可以使用自定义的适配器，并对所有 http/https 请求强制执行指数退避因子多次重试。请参阅下面的示例：

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

# create a transport adapter with a custom retry strategy.
retries = retry(
    total=3,
    backoff_factor=3,
    status_forcelist=[500, 502, 503, 504]
)
adapter = adapters.httpadapter(max_retries=retries)

# ensure adapter is used for both http and https requests.
session = requests.session()
session.mount('https://', adapter)
session.mount('http://', adapter)

# testing the retry mechanism
response = session.get("http://httpbin.org/status/500")

这将返回以下错误：

RetryError: HTTPConnectionPool(host='httpbin.org', port=80): Max retries exceeded with url: /status/500 (Caused by ResponseError('too many 500 error responses'))

不幸的是，似乎没有办法知道上述机制尝试了多少次重试，只有当所有尝试都已用尽时

参考

https://stackoverflow.com/a/47475019/4477547