Python Error: (encoding problem) syntaxerror:non-ascii character ' \xe2 ' in file

The specific error is as follows

File "E:\IDE\Python2.7.12\workspace\hello.py", line 1
syntaxerror:non-ascii character ' \xb2 ' in file E:\IDE\ python2.7.12\workspace\hello.py on line 1, but no encoding declared; Http://python.org/dev/peps/pep-0263/for Details

The reason for the error

1.syntaxerror:non-ascii character ' \xe2 ' in file means that there are non-ASCII characters in the files;

2.ASCII is 8 bits, one character, 256 characters, and with the development of the computer, 2 or 4 characters are now used;

3. The most important reason is that the document has Chinese

Recommendations-Solutions

Recommended Append to File header:
    #-*-coding:cp936-*-
    or
    #-*-Coding:utf-8-*