Python格式的无符号二进制整数到IP地址

Question

如何使用python.format（）获取无符号二进制整数并输出ip地址/网络掩码？例如

print("Netmask {...} ".format('10001000100010001000100010001000'))
10001000.10001000.10001000.10001000

Answer 1

您可以使用您的输入，在屏蔽后对其进行位移，然后将其重新组合在一起：

number = int('10001000100010001000100010001000',2)

one = number & 0xff
two = (number & 0xff00) >> 8
three = (number & 0xff0000) >> 16
four = (number & 0xff000000) >> 24

print(f"{four}.{three}.{two}.{one}")
print(f"{four:b}.{three:b}.{two:b}.{one:b}")

输出

136.136.136.136                       # as normal int

10001000.10001000.10001000.10001000   # as binary int

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如果低于3.6，可以使用"{:b}.{:b}.{:b}.{:b}".format(four,three,two,one)而不是f-strings。你知道吗

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免责声明：这使用应用于某些二进制位移位的Python int to binary string?：

  10001000100010001000100010001000  # your number  
& 11111111000000000000000000000000  # 0xff000000
= 10001000000000000000000000000000  # then >> 24
                          10001000 

  10001000100010001000100010001000  # your number  
& 00000000111111110000000000000000  # 0xff0000
= 00000000100010000000000000000000  # then >> 16
                  0000000010001000  # etc.