How to connect with SSL to an HTTPS server in Python 2.7.10+ and make the certificate trusted?

I want to connect to an https server using ssl with certificate validation and hostname validation (don't suggest turning off validation as it works). How can I do it with this code?

import ssl
import socket

context = ssl.create_default_context()
context.check_hostname = True
context.verify_mode = ssl.CERT_REQUIRED

conn = context.wrap_socket(socket.socket(socket.AF_INET),
                           server_hostname='adwords.google.com')
conn.connect(('adwords.google.com', 443))

      

        
        
        
      

    

Instead of connecting, there is an exception:

Traceback (most recent call last):
  File "C:/Users/Crezary Wagner/PycharmProjects/learn-adwords/src/03_ssl.py", line 16, in <module>
    conn.connect(('adwords.google.com', 443))
  File "C:\root\Python27\lib\ssl.py", line 844, in connect
    self._real_connect(addr, False)
  File "C:\root\Python27\lib\ssl.py", line 835, in _real_connect
    self.do_handshake()
  File "C:\root\Python27\lib\ssl.py", line 808, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:590)

Process finished with exit code 1

      

        
        
        
      

    

It's clear to me that a certificate cannot be verified as trusted, but how do I make that certificate trusted in Python 2.7.10+ and connect?

I want to set it up on the system in the wrong context, if possible.