Comments in Python 

Comments can be used to explain Python code.

Comments can be used to make the code more readable.

Comments can be used to prevent execution when testing code.

Creating a Comment

Comments starts with a #, and Python will ignore them:

create file  demo_comment1.py  add the below code in this file.

#This is a comment
print("Hello, World!")

After adding the above code in the fie  execute the code in following below manner. 

C:\Users\My Name>python demo_comment1.py
Hello, World!

Comments can be placed at the end of a line, and Python will ignore the rest of the line:

print("Hello, World!") #This is a comment

C:\Users\My Name>python demo_comment2.py
Hello, World!

Comments does not have to be text to explain the code, it can also be used to prevent Python from executing code:

#print("Hello, World!")
print("Cheers, Mate!")

Multi Line Comments

Python does not really have a syntax for multi line comments.

To add a multiline comment you could insert a # for each line:

#This is a comment
#written in
#more than just one line
print("Hello, World!")

C:\Users\My Name>python demo_comment4.py
Hello, World!

Or, not quite as intended, you can use a multiline string.

Since Python will ignore string literals that are not assigned to a variable, you can add a multiline string (triple quotes) in your code, and place your comment inside it:

"""
This is a comment
written in
more than just one line
"""
print("Hello, World!")

C:\Users\My Name>python demo_comment5.py
Hello, World!

As long as the string is not assigned to a variable, Python will read the code, but then ignore it, and you have made a multiline comment.