1. 将整数转换成IP:
思路:将整数转换成无符号32位的二进制,再8位进行分割,每8位转换成十进制即可。
方法一:#!usr/bin/python
2 #encoding=utf-8
3 #1. 将整数转换成32位无符号二进制
4 def intToIp(num):
5 s = []
6 g = []
7 h = []
8 for i in range(32):
9 a = num%2
10 s.insert(0,a)
11 num = num/2
12 print s
13 #2. 每8位进行分割,将4个8位二进制转换成十进制,加.连接即可。
14 for i in xrange(0,32,8):
15 g.append(s[i:i+8])
16 print g
17 for temp in g:
18 sum = 0
19 j = 0
20 for temp2 in temp:
21 sum = sum + temp2*(2**(7-j))
22 j += 1
23 print sum
24 h.append(str(sum))
25 return '.'.join(h)
26 a=intToIp(123456789)
27 print a
方法二:
1 #!usr/bin/python
2 #encoding=utf-8
3 def inttoip(num):
4 s = bin(num)[2:]
5 s = s.zfill(32)
6 g = []
7 h = []
8 for i in xrange(0,32,8):
9 g.append(s[i:i+8])
10 for temp in g:
11 h.append(str(int(temp,2)))
12 e = ".".join(h)
13 print e
14
15 inttoip(123456789)
2. 将IP地址转换成整数:
思路:将IP的四位分别转换成8位二进制,去"."后整合,再换算成十进制。
#!usr/bin/python
2 #encoding=utf-8
3 #将IP地址转换为数值字符串,如7.91.205.21转换后为“123456789”
5 def IpToInt(num):
6 #1.将IP地址转换成32位的二进制。
7 s = num.split('.')
8 h = []
9 g = []
10 for temp in s:
11 while(temp!=0):
12 temp = int (temp)
13 a = temp % 2
14 h.insert(0,a)
15 temp = temp/2
16 if len(h)!= 8:
17 for i in range(8-len(h)):
18 h.insert(0,0)
19 g.extend(h)
20 h = []
21 # print g
22 #2. 将二进制换算成整数:
23 sum = 0
24 j = 0
25 for temp2 in g:
26 sum = sum + temp2*(2**(31-j))
27 j += 1
28 print sum
29 IpToInt("7.91.205.21")
方法二:借助Python内置函数
1 #!usr/bin/python
2 #encoding=utf-8
3 def iptoint(num):
4 h=[]
5 s = num.split(".")
6 for temp in s:
7 a = bin(int(temp))[2:]
8 a = a.zfill(8)
9 h.append(a)
10 g = "".join(h)
11 e = int(g,2)
12 print e
13
14 iptoint('7.91.205.21')
注:初学python,代码有点low,请见谅!
有道的人遇事谦退无争,能在众人之中领先,将自己置于度外,能保全自身。