Python struct. unpack

1. Set the fomat format as follows:
Copy codeThe Code is as follows:
# Take the first five characters, skip the four Chinese characters, and then take three more characters
Format = '5s 4x 3s'

2. Use struck. unpack to obtain the substring
Copy codeThe Code is as follows:
Import struct
Print struct. unpack (format, 'test astring ')
# ('Test', 'in ')

Let's take a simple example. There is a string 'He is not very happy '. After processing it, remove the not in the middle and then output it.
Copy codeThe Code is as follows:
Import struct
TheString = 'He is not very happy'
Format = '2s 1x2 s 5x 4S 1x 5s'
Print ''. join (struct. unpack (format, theString ))

Output result:
He is very happy