python3 string, integer conversion between binary and forwarding (MAC address \ binary address forwarding the IP method)

 

1, decimal string to Integer

int('12') ==12

2, character to Integer

ord('a')==97

3, hexadecimal characters to Integer

int('a',16) == 10

MAC Address integer

例: a = FF: FF: FF: FF: FF: FF'.split (:)

int(a[0],16) = 255

int(a[1],16) = 255

int(a[2],16) = 255

int(a[3],16) = 255

int(a[4],16) = 255

int(a[5],16) = 255

4, Integer to character

chr(65) == 'A'

5, the data production section packets can be directly pressed into the binary approach employed

Pressed into the binary method

String directly into the For example: b'welcome to china '

The method of press-fitting integer

struct.pack('>B',255)

 

Reprinted from: http: //blog.sina.com.cn/s/blog_4c86552f0102x9fp.html