code: def get_default_ssl_version():
      
      if hasattr(ssl, 'PROTOCOL_TLSv1_2'):
          return ssl.PROTOCOL_TLSv1_2
      elif hasattr(ssl, 'PROTOCOL_TLSv1_1'):
          return ssl.PROTOCOL_TLSv1_1
      elif hasattr(ssl, 'PROTOCOL_TLSv1'):
          return ssl.PROTOCOL_TLSv1
      return None
docs: Get the highest support TLS version, if none is available, return None.
  
      :rtype: bool|None