Understanding about python character encoding

Python is used because of its beauty;
The following describes the application of common character encoding in python:
S = "China"
Print repr (s) # The Original output characters are expressed in hexadecimal notation.
# '\ Xd6 \ xd0 \ xb9 \ xfaa'
# We are most familiar with Ansi strings. English occupies one byte and Chinese characters are two bytes. They end with one \ 0 and are often used in txt text files.
# Unicode string. Each character (Chinese character or English letter) occupies 2 bytes and ends with 2 consecutive \ 0 characters.
# UTF-8: 1 byte in English and 3 bytes in Chinese
S1 = s. decode ('gbk') // The base64-encoded data must be decoded.
# U' \ u4e2d \ u56fda'
S2 = s1.encode ('utf-8') // encode unicode characters in UTF-8 format
# '\ Xe4 \ xb8 \ xad \ xe5 \ x9b \ xhangzhou'
S3 = s2.decode ('utf-8') // since it is encoded in UTF-8 format, it must be decoded in UTF-8 format.
# U' \ u4e2d \ u56fda'
S4 = s3.encode ('gbk') // The final part is encoded into common Chinese encoding formats.
# '\ Xd6 \ xd0 \ xb9 \ xfaa'

# Actually, it's just an expression.
Print s. decode ('gbk'). encode ('utf-8'). decode ('utf-8'). encode ('gbk ')
# China

Therefore, the character encoding method in python is actually very simple, but sometimes it is always wrong, hey
Now, let's make the above summary. I hope you will keep it in mind and never make similar mistakes.