code: def format_general_name(name):
      
  
      if isinstance(name, x509.DirectoryName):
          value = format_name(name.value)
      else:
          value = name.value
      return '%s:%s' % (SAN_NAME_MAPPINGS[type(name)], value)
docs: Format a single general name.
  
      >>> import ipaddress
      >>> format_general_name(x509.DNSName('example.com'))
      'DNS:example.com'
      >>> format_general_name(x509.IPAddress(ipaddress.IPv4Address('127.0.0.1')))
      'IP:127.0.0.1'