Requests访问HTTPS出错，ssl证书不受信任

当用requests访问https链接的时候会出现错误，
原因是爬虫访问该网站时不受证书信任，
只要关闭证书验证就行

错误：

Traceback (most recent call last):
  ....
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 814, in __init__
    self.do_handshake()
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 1068, in do_handshake
    self._sslobj.do_handshake()
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 689, in do_handshake
    self._sslobj.do_handshake()
   ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:777)

解决方法一

import ssl #导入模块
ssl._create_default_https_context = ssl._create_unverified_context #在代码前加入这行即可

解决方法二

import requests.packages.urllib3.util.ssl_
requests.packages.urllib3.util.ssl_.DEFAULT_CIPHERS = 'ALL'   #在代码前加入这行即可