Retrieving network mask in Python

Question

How would one go about retrieving a network device\'s netmask (In Linux preferably, but if it\'s cross-platform then cool)? I know how in C on Linux but I can\'t find a way

Answer 1

Using the python pyroute2 library you can get all network element attributes:

from pyroute2 import IPRoute
ip = IPRoute()
info = [{'iface': x['index'], 'addr': x.get_attr('IFA_ADDRESS'), 'mask':  x['prefixlen']} for x in ip.get_addr()]

More information available here:http://pyroute2.org/pyroute2-0.3.14p4/iproute.html

Answer 2

Using socket and ipaddress

From the documentation

ipaddress provides the capabilities to create, manipulate and operate on IPv4 and IPv6 addresses and networks.
 The functions and classes in this module make it straightforward to handle various tasks related to IP addresses ...

>>> import socket
>>> import ipaddress
>>>
>>> ip_addr = socket.gethostbyname(socket.gethostname())
>>> netmask = ipaddress.IPv4Network(ip_addr).netmask
>>> print(netmask)
255.255.255.255
>>> ...

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