用python实现子网掩码地址与位长的相互转换

nmcli connection enp4s0 modify ipv4.methord manual ipv4.address "192.168.1.120/24" ipv4.gateway "192.168.1.1" ipv4.dns "223.5.5.5"

# coding:utf-8

def exchange_mask(mask):
# 计算二进制字符串中 '1' 的个数
count_bit = lambda bin_str: len([i for i in bin_str if i=='1'])

# 分割字符串格式的子网掩码为四段列表
mask_splited = mask.split('.')

# 转换各段子网掩码为二进制, 计算十进制
mask_count = [count_bit(bin(int(i))) for i in mask_splited]

return sum(mask_count)

if __name__ == '__main__':
print exchange_mask('255.255.0.0')

#codint = utf8

def exchange_maskint(mask_int):
bin_arr = ['0' for i in range(32)]
for i in range(mask_int):
bin_arr[i] = '1'
tmpmask = [''.join(bin_arr[i * 8:i * 8 + 8]) for i in range(4)]
tmpmask = [str(int(tmpstr, 2)) for tmpstr in tmpmask]
return '.'.join(tmpmask)

if __name__ == '__main__':
print exchange_maskint(24)