def enable_nat(interface):
 run(settings.iptables, '-t', 'nat', '-A', 'POSTROUTING', '-o', interface, '-j', 'MASQUERADE')

def enable_nat ( interface ) : run ( settings . iptables , '-t' , 'nat' , '-A' , 'POSTROUTING' , '-o' , interface , '-j' , 'MASQUERADE' )
enable nat on this interface .