Day 10: Python Lists
Understanding Lists in Python
Lists in Python are used to store a collection of items in a single place. They are ordered and can contain items of any data type, including other lists. To create a list in Python, enclose a comma-separated list of items in square brackets. You can access and modify the items in the list using their index, which starts at 0 for the first item. Python also provides various methods to manipulate lists, such as append() to add an item to the end of the list.
Creating and Accessing Lists in Python
In the above example, we have created three lists: numbers, words, and mixed. The mixed list even contains another list as one of its items.
numbers = [1, 2, 3, 4, 5]
print(numbers[0]) # Output: 1
print(numbers[2]) # Output: 3
numbers[1] = 6
print(numbers) # Output: [1, 6, 3, 4, 5]
In this example, we access items in the numbers list using their index and modify one of the items.
Manipulating Lists in Python
numbers = [1, 2, 3, 4, 5]
# Use append() to add an item to the end of the list
numbers.append(6)
print(numbers) # Output: [1, 2, 3, 4, 5, 6]
In the above example, we use the append() method to add an item to the end of the numbers list.
numbers = [1, 2, 3, 4, 5]
# Use pop() to remove an item from the end of the list
numbers.pop()
print(numbers) # Output: [1, 2, 3, 4]
# You can also specify the index of the item to remove
numbers.pop(1)
print(numbers) # Output: [1, 3, 4]
In this example, we use the pop() method to remove an item from the end of the numbers list. We also show how to remove an item at a specific index.
By understanding how to create, access, and manipulate lists in Python, you can effectively manage collections of items in your code. Stay tuned for more Python-related content.
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