Adding Items to an Array in Python

In Python, arrays can be effectively managed using lists, a versatile data structure. This guide provides a detailed overview of how to add items to a list in Python.

Key Concepts

• List: A collection of items that can be of different types. Lists are mutable, meaning they can be modified after their creation.
• Methods to Add Items: Python offers several methods to add items to a list.

Methods to Add Items

1. append()

• Description: Adds a single item to the end of the list.
• Syntax: list_name.append(item)

Example:

fruits = ['apple', 'banana']
fruits.append('orange')
print(fruits)  # Output: ['apple', 'banana', 'orange']

2. extend()

• Description: Adds multiple items to the end of the list, taking an iterable as an argument.
• Syntax: list_name.extend(iterable)

Example:

fruits = ['apple', 'banana']
fruits.extend(['orange', 'grape'])
print(fruits)  # Output: ['apple', 'banana', 'orange', 'grape']

3. insert()

• Description: Inserts an item at a specified position in the list.
• Syntax: list_name.insert(index, item)

Example:

fruits = ['apple', 'banana']
fruits.insert(1, 'orange')  // Insert 'orange' at index 1
print(fruits)  // Output: ['apple', 'orange', 'banana']

Summary

• Use append() to add a single item to the end of the list.
• Use extend() to add multiple items to the list.
• Use insert() to add an item at a specific index.

These methods offer flexibility for managing lists in Python, making it easy to modify your data as needed.