How to Create a List in Python: Syntax and Examples

To create a list in Python, use square brackets [] and separate items with commas. For example, my_list = [1, 2, 3] creates a list of three numbers.

Syntax

A list in Python is created by placing items inside square brackets [], separated by commas. Lists can hold any type of data, like numbers, words, or even other lists.

• Square brackets: Define the start and end of the list.
• Items: Values inside the list, separated by commas.
• Empty list: Use [] to create a list with no items.

python

my_list = ['item1', 'item2', 'item3']
empty_list = []

Example

This example shows how to create a list with different types of items and print it.

python

my_list = [10, 'apple', 3.14, True]
print(my_list)

Output

[10, 'apple', 3.14, True]

Common Pitfalls

Some common mistakes when creating lists include:

• Forgetting commas between items, which causes syntax errors.
• Using parentheses () instead of square brackets [], which creates a tuple, not a list.
• Trying to create a list without assigning it to a variable, which means you can't use it later.

python

wrong_list = (1, 2, 3)  # This is a tuple, not a list
correct_list = [1, 2, 3]

# Missing commas example (wrong):
# my_list = [1 2 3]  # SyntaxError

# Correct way:
my_list = [1, 2, 3]

Quick Reference

Here is a quick summary to remember how to create lists:

Action	Syntax Example
Create a list with items	[1, 2, 3]
Create an empty list	[]
List with mixed types	[1, 'two', 3.0, True]
Access first item	my_list[0]
Add item to list	my_list.append(4)

Key Takeaways

Use square brackets [] with commas to create a list in Python.

Lists can hold different types of items together.

Remember to separate items with commas to avoid errors.

Empty lists are created with empty square brackets [].

Avoid using parentheses () when you want a list, as that creates a tuple.