Python requests報錯解決辦法：Max retries exceeded with url/Name or service not known

報錯一：Max retries exceeded with url

原因：訪問URL超過最大連接數，關閉長連接可解決，代碼如下

import requests


# 原代碼
response = requests.post(url, data=data)


# 修復後代碼
# 方案一：設置headers關閉持久鏈接
headers = {
    'Connection': 'close'
}
response = requests.post(url, data=data, headers=headers)

#方案二：設置Keep-alive = False
s = requests.session()
s.keep_alive = False
s.post(url, data=data)

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報錯二：Failed to establish a new connection: [Errno -2] Name or service not known’,)

原因：域名無法訪問，經檢查CentOS未配置DNS，Linux查看DNS配置命令cat /etc/resolv.conf

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若爲以下報錯，同時出現上面兩個報錯，優先檢查服務器是否配置DNS，切記！

HTTPConnectionPool(host='url', port=port): Max retries exceeded with url: /path (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f188bac7898>: Failed to establish a new connection: [Errno -2] Name or service not known',))