nl: ipv4_address is a string "%d.%d.%d.%d" formated with first 2 elements of seventh element of hextets converted into hexadecimal number,
code: ipv4_address = "%d.%d.%d.%d" % ( int ( hextets [ 6 ] [ 0 : 2 ] , 16 ) , int ( hextets [ 6 ] [ 2 : 4 ] , 16 ) , int ( hextets [ 7 ] [ 0 : 2 ] , 16 ) , int ( hextets [ 7 ] [ 2 : 4 ] , 16 ) , )