socket.getnameinfo

socket.getnameinfo(address, flag)

• The functions translates a socket address into (host, port)

• Depending on the settings of flag, the result can contain:

  • A fully-qualified domain name
  • A numeric accress representation in host or port

• The flag parameter accepts the following:

  • NI_NUMERICHOST: Returns the address in numeric form
  • NI_NUMERICSERV: The returned port is a string containing the port number
  • NI_DGRAM: Specifies that the service being looked up is UDP instead of TCP

Example of getnameinfo

>>> import socket
>>> addr = ('194.109.137.226', 80)
>>> socket.getnameinfo(addr, 0)
('fang.python.org', 'http')
>>> socket.getnameinfo(addr, NI_NUMERICSERV)
('fang.python.org', '80')

References

• Python Essential Reference
• Documentation for socket API