ipv4.py

import socket
import pyroute2

ip = pyroute2.IPRoute()

addrs = [
    '/'.join((
        dict(addr.get('attrs', [])).get('IFA_ADDRESS'),
        str(addr.get('prefixlen')),
    ))
    for addr in ip.get_addr(
        scope=0,  # global
        family=socket.AF_INET,
    )
]

for addr in addrs:
    print(addr)

ipv6.py

import socket
import pyroute2

ip = pyroute2.IPRoute()

addrs = [
    '/'.join((
        dict(addr.get('attrs', [])).get('IFA_ADDRESS'),
        str(addr.get('prefixlen')),
    ))
    for addr in ip.get_addr(
        scope=0,  # global
        family=socket.AF_INET6,
    )
]

for addr in addrs:
    print(addr)