Three types of comments:
single-line comments: start with #
Multi-line comments: a pair of triple quotation marks, which can be three single quotation marks or three double quotation marks, which is actually a string, but not assigned to any variable. Declare Chinese
encoded Method: Add a Chinese statement comment at the beginning of the file to specify the encoding format of the source file, such as: #coding:gbk, this line should be written at the top of the Python source file.
The default encoding for Python source files is UTF-8