python 十進制 和 IP 地址互轉

#! /bin/python

def ip2decimalism(ip):
    dec_value = 0
    v_list = ip.split('.')
    v_list.reverse()
    t = 1
    for v in v_list:
        dec_value += int(v) * t
        t = t * (2 ** 8)
    return dec_value
 
def decimalism2ip(dec_value):
    ip = ''
    t = 2 ** 8
    for _ in range(4):
        v = dec_value % t
        ip = '.' + str(v) + ip
        dec_value = dec_value // t
    ip = ip[1:]
    return ip
 
if __name__ == '__main__':
    dec_value = ip2decimalism('0.0.0.10')
    print(dec_value)

    ip = decimalism2ip(10)
    print(ip)