Here’s a comprehensive list of the built-in list methods in Python, along with a brief description of each:

List Methods in Python

1. list.append(x)

   • Adds an item x to the end of the list.

2. list.extend(iterable)

   • Extends the list by appending elements from an iterable (e.g., another list).

3. list.insert(i, x)

   • Inserts an item x at a given position i in the list.

4. list.remove(x)

   • Removes the first occurrence of an item x from the list. Raises a ValueError if the item is not found.

5. list.pop([i])

   • Removes and returns the item at the given position i. If no index is specified, pop() removes and returns the last item in the list.

6. list.clear()

   • Removes all items from the list.

7. list.index(x[, start[, end]])

   • Returns the index of the first occurrence of an item x in the list. Raises a ValueError if the item is not found. You can also specify a start and end index for searching.

8. list.count(x)

   • Returns the number of occurrences of an item x in the list.

9. list.sort(key=None, reverse=False)

   • Sorts the items of the list in place (the arguments can be used for custom sorting).

10. list.reverse()

    • Reverses the elements of the list in place.

11. list.copy()

    • Returns a shallow copy of the list.

Example Usage of List Methods

Here’s a brief example demonstrating some of these methods:

# Create a list
my_list = [1, 2, 3, 4]

# Append an item
my_list.append(5)  # my_list is now [1, 2, 3, 4, 5]

# Extend the list
my_list.extend([6, 7])  # my_list is now [1, 2, 3, 4, 5, 6, 7]

# Insert an item
my_list.insert(0, 0)  # my_list is now [0, 1, 2, 3, 4, 5, 6, 7]

# Remove an item
my_list.remove(4)  # my_list is now [0, 1, 2, 3, 5, 6, 7]

# Pop an item
last_item = my_list.pop()  # Removes and returns 7, my_list is now [0, 1, 2, 3, 5, 6]

# Clear the list
my_list.clear()  # my_list is now []

# Count occurrences
my_list = [1, 2, 2, 3]
count_of_twos = my_list.count(2)  # Returns 2

# Sorting
my_list.sort()  # Sorts the list in place

# Reversing
my_list.reverse()  # Reverses the list in place

# Copying
new_list = my_list.copy()  # Creates a shallow copy of my_list

Summary

These methods provide a rich set of functionalities for manipulating lists in Python, making it easy to add, remove, and modify elements within a list.