How to comment multiple lines in Python?

Hellen 94 Published: 09/30/2024

How to comment multiple lines in Python?

I'd be happy to help!

In Python, there are several ways to comment out multiple lines of code. Here's a comprehensive rundown:

1. Block Commenting (Multi-Line Comments)

The most common way is by using # followed by the word __future__. This method only works for Python 2.x:

#!/usr/bin/env python
-- coding: utf-8 --
This is a block comment, which spans multiple lines.

This is a multi-line comment. It's very useful when you

want to comment out a large chunk of code.

print("Hello, World!")

2. Triple Quotes (Raw Strings)

You can also use triple quotes (""") or ''' for multiline comments:

"""

This is a raw string (also called a docstring).

It's useful when you want to add documentation

to your code without affecting its execution.

"""

print("Hello, World!")

3. Triple Apostrophes

Triple apostrophes (''') work the same as triple quotes:

'''

This is another way to comment out multiple lines.

You can use this for block comments or docstrings.

'''

print("Hello, World!")

4. Fenced Code Blocks (RST and ReStructuredText)

In Python 3.x, you can use the textwrap.dedent() function from the textwrap module to comment out code:

import textwrap

def multiline_comment():

"""

This is a fenced code block using RST syntax.

This code won't execute when commented out.

The fence markers are three backticks

`.

You can use this for large blocks of code or docstrings.

"""

print("Hello, World!")


In summary, you have four options to comment out multiple lines in Python:

Block commenting (Python 2.x) Triple quotes (raw strings) or triple apostrophes textwrap.dedent() function (fenced code blocks)

Remember to always use a consistent method throughout your project to maintain readability and consistency.

Do you have any more questions about Python or comments?

Can we make multi line comments in python example

Yes, you can make multi-line comments in Python by using a triple quote (either single quotes: ' or double quotes: "). Here's an example:

# This is a comment that spans multiple lines

print("Hello")

print("World")

'''

This is a long comment that

spans multiple lines. You can

put as much text in here as you

like.

'''

"""

And this is another way to make

a multi-line comment in Python.

You can put any valid python code

in these quotes and it will be

ignored by the interpreter.

"""

In this example, we have two different ways of making multi-line comments: the first uses triple single quotes, while the second uses triple double quotes. Both of them allow you to write a comment that spans multiple lines.

Here's what each of them looks like:

Triple single quotes ''' : These are used to enclose strings and can be used as a comment. Triple double quotes """ : These are also used to enclose strings and can be used as a comment.

When you use triple quotes to make a multi-line comment, Python will ignore everything between the quotes. This means that if you have any code or text between the quotes, it won't affect the program in any way. Here's what happens when you run this code:

# This is a comment that spans multiple lines

print("Hello")

print("World")

'''

This is a long comment that

spans multiple lines. You can

put as much text in here as you

like.

'''

"""

And this is another way to make

a multi-line comment in Python.

You can put any valid python code

in these quotes and it will be

ignored by the interpreter.

"""

print("Goodbye")

print("World")

When you run this code, it prints out:

Hello

World

And this is another way to make

a multi-line comment in Python.

You can put any valid python code

in these quotes and it will be

ignored by the interpreter.

Goodbye

World

As you can see, the multi-line comments are ignored and the program only prints out "Hello", "World", and "Goodbye".