Python: annotation

There are single-line comments and multi-line comments:

Single-line comments use the hash sign ‘#’ :

# -*- coding: UTF-8 -*-
# This is a one-line comment
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Multi-line comments enclose comments with three single quotation marks or three double quotation marks

# -*- coding: UTF-8 -*-
This is a multi-line comment, enclosed in 3 single quotes.

""" This is also a multi-line comment, enclosed in three double quotation marks.
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PyCharm shows the effect below:

Figure 1.1