import math

class AuthException(Exception):
    pass

def ip_to_long(ip_address):
    '''

    '''

    if(ip_address == '0:0:0:0:0:0:0:1'):
        ip_address = '127.0.0.1'

    ip_address_array = ip_address.split('.')

    if(len(ip_address_array) != 4):    
        raise AuthException('Invalid Ip')

    #print(ip_address_array[1])

    num = 0
    for i in range(len(ip_address_array)):
        #print(ip_address_array[i])
        power = 3 - i
        num = num + ( (int(ip_address_array[i]) % 256 * int(math.pow(256, power)) ))

    return num

ip_long = ip_to_long('10.3.81.34')        
print(ip_long)

167989538

def long_to_ip(ip):

    ip_address = ((ip >> 24) & 0xFF) + "." + ((ip >> 16) & 0xFF) + "." + ((ip >> 8) & 0xFF) + "." + (ip & 0xFF)

    return ip_address

#ip_ = long_to_ip(int(167989538))

#print(ip_)