Flash cards
Review the key moves
What is the main idea behind Python Comments?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
Which statement best captures the main point of this lesson?
Complete the missing token from the example code.
#___ is a commentPut the learning moves in the order that makes the concept easiest to apply.
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:
Example
#This is a comment
print("Hello, World!")Comments can be placed at the end of a line, and Python will ignore the rest of the line:
Example
print("Hello, World!") #This is a commentA comment does not have to be text that explains the code, it can also be used to prevent Python from executing code:
Example
#print("Hello, World!")
print("Cheers, Mate!")Multiline Comments
Python does not really have a syntax for multiline comments.
To add a multiline comment you could insert a # for each line:
Example
#This is a comment
#written in
#more than just one line
print("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:
Example
"""
This is a comment
written in
more than just
one line
"""
print("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.