Python Comments

What are comments?

Comments can be used to explain Python code.
Comments can be used to make the code more readable.
Can be used to prevent execution when testing code (i.e. turn off a line of code temporarily)

1. Creating a comment

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

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

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

Hello, World!

A comment does not have to be text that explains the code, it can also be used to prevent Python from executing code:

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

Output:
Cheers, Mate!

2. 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!")

Or, not quite as intended, you can use a multi-line strings.

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!")

Using multiline string as comments

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.