List Methods and Functions

List Methods and Functions

Python provides a rich set of methods and functions to manipulate lists.

List Methods

List methods are functions that are specific to list objects and modify the list in place.

• append(item): Adds an item to the end of the list.
• insert(index, item): Inserts an item at a specific index.
• remove(item): Removes the first occurrence of a specified item.
• pop(index): Removes and returns the item at a specific index (default is the last item).
• index(item): Returns the index of the first occurrence of an item.
• count(item): Returns the number of occurrences of an item.
• sort(): Sorts the list in ascending order.
• reverse(): Reverses the order of the elements in the list.
• extend(iterable): Appends the elements from an iterable to the end of the list.
• clear(): Removes all elements from the list.

List Functions

List functions are built-in functions that can be used with lists.

• len(list): Returns the number of elements in the list.
• max(list): Returns the largest item in the list.
• min(list): Returns the smallest item in the list.
• sum(list): Returns the sum of all elements in the list (only for numeric lists).

Example

Python

my_list = [3, 1, 4, 1, 5, 9]

# Add an element
my_list.append(2)

# Sort the list
my_list.sort()

# Remove the first occurrence of 1
my_list.remove(1)

print(my_list)  # Output: [1, 2, 3, 4, 5, 9, 2]

Read More..