b = '1'
c = len(b)
while c < 9:
d = b.ljust(8, '0')
#两种输出格式
print( f"二进制{ d }相当于十进制{ int(d,2) }")
print( "二进制%s相当于十进制%s" %(d, int(d,2)))
b = b+'1'
c = len(b)
标签：Python,IP,print,len,int,掩码 From： https://www.cnblogs.com/bravesunforever/p/17659853.html