Change List Items
In Python, you can change the value of a specific item in a list by accessing the item using its index and then assigning a new value to it. Here's how you can change list items:
# Original list
numbers = [1, 2, 3, 4, 5]
# Change the value at index 2
numbers[2] = 10
# Now, numbers is [1, 2, 10, 4, 5]
In the example above, numbers[2]
refers to the element at index 2 in the list (3
in the original list), and we assign a new value (10
) to it.
You can also use list slicing to change multiple elements at once:
# Original list
numbers = [1, 2, 3, 4, 5]
# Change values from index 1 to 3
numbers[1:4] = [20, 30, 40]
# Now, numbers is [1, 20, 30, 40, 5]
In this example, numbers[1:4]
refers to the sublist from index 1 to 3, and we assign a new list ([20, 30, 40]
) to replace that sublist.
Keep in mind that when you change the value of a list item using indexing, you are modifying the original list in place. If you want to create a new list with the changes, you can use list concatenation, list comprehension, or other list manipulation techniques.