Python Data Structures List Methods Usage.

Python: list methods usage.

1. append() - Adds an element to the end of the list.

    my_list = [1, 2, 3]
    my_list.append(4)
    print(my_list)
   

   Output:

    [1, 2, 3, 4]
   

2. clear() - Removes all elements from the list.

    my_list = [1, 2, 3]
    my_list.clear()
    print(my_list)
   

   Output:

    []
   

3. copy() - Creates a shallow copy of the list.

    original_list = [1, 2, 3]
    copied_list = original_list.copy()
    print(copied_list)
   

   Output:

    [1, 2, 3]
   

4. count() - Returns the number of occurrences of a specified element in the list.

    my_list = [1, 2, 2, 3, 2]
    count_of_2 = my_list.count(2)
    print(count_of_2)
   

   Output:

    3
   

5. extend() - Appends the elements of another list to the end of the current list.

    list1 = [1, 2, 3]
    list2 = [4, 5, 6]
    list1.extend(list2)
    print(list1)
   

   Output:

    [1, 2, 3, 4, 5, 6]
   

6. index() - Returns the index of the first occurrence of a specified element.

    my_list = [1, 2, 3, 2, 4]
    index_of_2 = my_list.index(2)
    print(index_of_2)
   

   Output:

    1
   

7. insert() - Inserts an element at a specified position.

    my_list = [1, 2, 3]
    my_list.insert(1, 4)
    print(my_list)
   

   Output:

    [1, 4, 2, 3]
   

8. pop() - Removes and returns the element at the specified position (default is the last element).

    my_list = [1, 2, 3]
    popped_element = my_list.pop(1)
    print(popped_element)
    print(my_list)
   

   Output:

    2
    [1, 3]
   

9. remove() - Removes the first occurrence of a specified element.

    my_list = [1, 2, 3, 2, 4]
    my_list.remove(2)
    print(my_list)
   

   Output:

    [1, 3, 2, 4]
   

10. reverse() - Reverses the order of elements in the list.

    my_list = [1, 2, 3, 4]
    my_list.reverse()
    print(my_list)
    

    Output:

    [4, 3, 2, 1]
    

11. sort() - Sorts the elements of the list in ascending order (or specified order).

    my_list = [4, 2, 1, 3]
    my_list.sort()
    print(my_list)
    

    Output:

    [1, 2, 3, 4]
    

These examples demonstrate the basic usage of each list method in Python.