Convert an IP string to a number and vice versa

Question

How would I use python to convert an IP address that comes as a str to a decimal number and vice versa?

For example, for the IP 186.99.109.000 &l

Answer 1

Here's One Line Answers:

import socket, struct

def ip2long_1(ip):
    return struct.unpack("!L", socket.inet_aton(ip))[0]

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def ip2long_2(ip):
    return long("".join(["{0:08b}".format(int(num)) for num in ip.split('.')]), 2)

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def ip2long_3(ip):
    return long("".join(["{0:08b}".format(num) for num in map(int, ip.split('.'))]), 2)

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Execution Times:

ip2long_1 => 0.0527065660363234 ( The Best )
ip2long_2 => 0.577211893924598
ip2long_3 => 0.5552745958088666