Python List methods; Through this tutorial, i am going to show you about built-in list methods/functions in python.
Using the python list methods; you can insert/add, remove/delete, modify, sort, copy, count, and reverse list or array element in python.
Python list built-in Functions/Methods
See the built-in lists methods/functions in python; as shown in below list:
| Method | Description |
|---|---|
| append() | Adds an element at the end of the list |
| clear() | Removes all the elements from the list |
| copy() | Returns a copy of the list |
| count() | Returns the number of elements with the specified value |
| extend() | Add the elements of a list (or any iterable), to the end of the current list |
| index() | Returns the index of the first element with the specified value |
| insert() | Adds an element at the specified position |
| pop() | Removes the element at the specified position |
| remove() | Removes the first item with the specified value |
| reverse() | Reverses the order of the list |
| sort() | Sorts the list |
See the uses of built-in list methods/functions in python; as shown below:
Python append method
The append() function is used to add items to the Python list. And the item is added to the end of the list.
# list of integers my_list = [10, 20, 30, 40, 50, 60, 70, 80, 90] my_list.append(100) print(my_list) #Output #[10, 20, 30, 40, 50, 60, 70, 80, 90, 100]
Python clear list method
The python clear() method is used to removes all the elements from a list.
# list of integers my_list = [10, 20, 30, 40, 50, 60, 70, 80, 90] my_list.clear() print(my_list) #Output #[]
List copy method in python
The copy() function copies one list into another list.
# list of integers my_list = [10, 20, 30, 40, 50, 60, 70, 80, 90] blist= my_list.copy() print(blist) #output # [10, 20, 30, 40, 50, 60, 70, 80, 90]
List count method in list in python
The count() method returns the number of elements with the specified value.
# list of integers my_list = [10, 20, 30, 40, 50, 60, 70, 80, 90,10, 20, 10] blist= my_list.count(10) print(blist) #output # 3
List extend method in python
In Python, the Extend () method is used to add specific list items to the current list.
a = [1, 2, 3] b = [4, 5, 6] a.extend(b) print(a) #ouput #[1, 2, 3, 4, 5, 6]
List index method in python
The index() method is used to find the first occurrence of the specified value.
a = [1, 2, 3, 2, 5, 6, 7, 2] x = a.index(2) print(x) #output #1
Python List insert() Method
The insert() method is used to insert the specified element at the specified position in the python list.
# list of integers my_list = [10, 20, 30, 40, 50, 60, 70, 80, 90] my_list.insert(1, 5) print(my_list) #Output #[10, 5, 20, 30, 40, 50, 60, 70, 80, 90]
List pop() Method in Python
The pop() method used to remove the element at the specified position in python list.
# list of integers my_list = [10, 20, 30, 40, 50, 60, 70, 80, 90] my_list.pop(2) print(my_list) #[10, 20, 40, 50, 60, 70, 80, 90]
List remove method in python
The remove() method is used to remove the first occurrence item with a specified value on python lists.
# list of integers my_list = [10, 20, 30, 40, 50, 60, 70, 80, 90] my_list.remove(90) print(my_list) #output # [10, 20, 30, 40, 50, 60, 70, 80]
Python list reverse method
The reverse() method is used to reverse the sorting order of the elements.
x = [1, 2, 3, 4, 5] x.reverse() print(x) #Output #[5, 4, 3, 2, 1]
Python sort list method
The sort() method sorts the list ascending by default.
x = [6, 7, 1, 5, 4, 8] x.sort() print(x) #Output #[1, 4, 5, 6, 7, 8]