Python:ValueError: check_hostname needs a SSL context with either CERT_OPTIONAL or CERT_REQUIRED

  File "C:\Python27\lib\site-packages\urllib3\connection.py", line 496, in _connect_tls_proxy
    ssl_context.check_hostname = True
ValueError: check_hostname needs a SSL context with either CERT_OPTIONAL or CERT_REQUIRED

解決辦法：

關閉代理。