Python's U ' string ' (character encoding): a string that has u in front of it, indicating that the string is stored in Unicode format

As an example,

>>> u‘\u6ce8\u91ca‘>>> su‘\u6ce8\u91ca‘>>> print s注释>>> print‘unicode‘>>>> print s.encode(‘gbk‘)注释

The string pre-plus U is expressed as Unicode encoding, and the Unicode encoding of the current text can be set,
For example, the Utf-8 code is the first line plus:

# -*- coding: utf-8 -*-

And the GBK code is

# -*- coding: gbk -*-

Reference
Python Chinese encoding

Detailed Python-encoded content
As an example

#输出‘\xce\xd2\xca\xc7\xd6\xd0\xce\xc4′

can refer to
http://www.crifan.com/python_already_got_correct_encoding_string_but_seems_print_messy_code/

Python's U ' string ' (character encoding): a string with u before it, indicating that the string is stored in Unicode format