Python code for accessing a pure IP database

Core code: Copy codeThe Code is as follows :#! /Usr/bin/env python
#-*-Coding: UTF-8 -*-

From bisect import bisect

_ LIST1, _ LIST2 = [], []
_ INIT = False

Ip2int = lambda ip_str: reduce (lambda a, B: (a <8) + B, [int (I) for I in ip_str.split ('.')])

Def _ init ():
Global _ LIST, _ INIT
If not _ INIT:
For l in open('ipdata.txt ', 'rb '):
Ip1, ip2 = l. split () [: 2]
Addr = ''. join (l. split () [2:])
Ip1, ip2 = ip2int (ip1), ip2int (ip2)
_ LIST1.append (ip1)
_ LIST2.append (ip1, ip2, addr ))
_ INIT = True

Def ip_from (ip ):
_ Init ()
I = ip2int (ip)
Idx = bisect (_ LIST1, I)
Assert (idx> 0)
If len (_ LIST1) <= idx:
Return u 'unknown ip address % s' % ip
Else:
Frm, to, addr = _ LIST2 [idx-1]
If frm <= I <=:
Return addr
Else:
Return u 'unknown ip address % s' % ip

If _ name _ = '_ main __':
Print ip_from ('2014. 238.54.106 ')
Print ip_from ('1970. 181.29.160 ')
Print ip_from ('2014. 238.54.107 ')
Print ip_from ('8. 8.8.8 ')

Code package download http://xiazai.jb51.net/201105/yuanma/ipaddress.7z