Python Arrays

Python Arrays

Welcome to our tutorial on arrays in Python!

Arrays are one of the most fundamental data structures in computer programming. In Python, arrays are implemented using the list data type. In this tutorial, we’ll cover the basics of arrays in Python and show you how to use them in your own programs.

What is an Array?

An array is a collection of values that are stored in contiguous memory locations. Each value in the array is accessed using an index, which is an integer value that represents the position of the value in the array.

In Python, arrays are implemented using the list data type. Here’s an example of how to create a list in Python:

my_list = [1, 2, 3, 4, 5]

This creates a list called my_list with the values [1, 2, 3, 4, 5].

Accessing Array Elements in Python

To access an element in an array, you use the index of the element. In Python, the first element in a list has an index of 0. Here’s an example:

my_list = [1, 2, 3, 4, 5]
print(my_list[0])   # prints 1
print(my_list[2])   # prints 3

This will output:


Modifying Python Array Elements

You can modify the value of an element in an array by assigning a new value to the index. Here’s an example:

my_list = [1, 2, 3, 4, 5]
my_list[2] = 10

This will output:

[1, 2, 10, 4, 5]

Array Operations

Python lists come with a variety of built-in operations for working with arrays. Here are a few examples:

  • len(my_list): Returns the length of the list.
  • my_list.append(value): Appends value to the end of the list.
  • my_list.insert(index, value): Inserts value at the specified index.
  • my_list.remove(value): Removes the first occurrence of value from the list.


This lesson in our python tutorial taught you that arrays are a powerful tool in Python for storing and working with collections of data. By understanding the basics of arrays, you can write more efficient and effective code in your own programs. Practice using arrays on your own as you explore more documentation on Whitewood Media & Web Development.