Determine name of Wifi interface with Python

getWifiInterface.py

  #!/usr/bin/python3
# -*- coding: utf-8 -*-

try:
    from netifaces import interfaces
except ImportError:
    print("The python package netifaces is required.")
    print("You can install it from the PyPI with ``pip install netifaces''.")
    exit(1)

# array with names of interfaces
# e.g. ['lo', 'enp3s0', 'wlp7s0'] or ['lo', 'wlan0', 'virbr0'] 
ifaces = interfaces()

# get the right one
name_old = 'wlan0'
name_new = 'wlp7s0'
try:
    i = ifaces.index(name_old)
except ValueError:
    i = ifaces.index(name_new)

print(ifaces[i])