Python

methods on list in Python

Click for All Topics

methods on list in Python

In Python, lists are versatile data structures, and there are numerous methods available for manipulating and working with lists. Here’s a list of common methods you can use on lists in Python:

Modification and Manipulation:

list.append(x):

Adds an element x to the end of the list.

				
					my_list = [1, 2, 3]
print('original list:',my_list)
my_list.append(4)
print('modified list:',my_list)

# Output -
# original list: [1, 2, 3]
# modified list: [1, 2, 3, 4]

list.extend(iterable):

Extends the list by appending elements from an iterable.

				
					my_list = [1, 2, 3]
print('Original list:',my_list)
my_list.extend([4, 5, 6])
print('Modified list:',my_list)

# Output -
# Original list: [1, 2, 3]
# Modified list: [1, 2, 3, 4, 5, 6]

list.insert(i, x):

Inserts an element x at the specified position i.

				
					my_list = [1, 2, 3]
print('Original list:',my_list)
my_list.insert(1, 4)  # Inserts 4 at index 1
print('Modified list:',my_list)

# Output -
# Original list: [1, 2, 3]
# Modified list: [1, 4, 2, 3]

list.remove(x):

Removes the first occurrence of element x from the list.

				
					my_list = [1, 2, 3, 2]
print('Original list:',my_list)
my_list.remove(2)  # Removes the first occurrence of 2
print('Modified list:',my_list)


# Output -
# Original list: [1, 2, 3, 2]
# Modified list: [1, 3, 2]

list.pop([i]):

Removes and returns the element at index i. If i is not provided, removes and returns the last element.

				
					my_list = [1, 2, 3]
print('Original list:',my_list)
popped_value = my_list.pop(1)  # Removes and returns the element at index 1
print('Modified list:',my_list)

# Output -
# Original list: [1, 2, 3]
# Modified list: [1, 3]

list.clear():

Removes all elements from the list.

				
					my_list = [1, 2, 3]
print('Original list:',my_list)
my_list.clear()  # Removes all elements
print('Modified list:',my_list)

# Output -
# Original list: [1, 2, 3]
# Modified list: []

Searching and Counting:

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

- Returns the index of the first occurrence of element x in the list.

				
					my_list = [1, 2, 3, 2]
print('Original list:',my_list)
index = my_list.index(2)  # Returns the index of the first occurrence of 2
print('Index of 2:',index)

# Output -
# Original list: [1, 2, 3, 2]
# Index of 2: 1

list.count(x):

Returns the number of occurrences of element x in the list.

				
					my_list = [1, 2, 3, 2]
print('Original list:',my_list)
count = my_list.count(2)  # Returns the number of occurrences of 2
print('count of 2:',count)

# Output -
# Original list: [1, 2, 3, 2]
# count of 2: 2

Sorting and Reversing:

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

- Sorts the list in ascending order. key and reverse are optional parameters.

				
					my_list = [3, 1, 4, 1, 5, 9, 2]
print('Original list:',my_list)
my_list.sort()  # Sorts the list in ascending order
print('Modified list:',my_list)

# Output -
# Original list: [3, 1, 4, 1, 5, 9, 2]
# Modified list: [1, 1, 2, 3, 4, 5, 9]

list.reverse():

Reverses the elements of the list in place.

				
					my_list = [1, 2, 3]
print('Original list:',my_list)
my_list.reverse()  # Reverses the list in place
print('Modified list:',my_list)

# Output -
# Original list: [1, 2, 3]
# Modified list: [3, 2, 1]

Other Methods:

list.copy():

- Returns a shallow copy of the list.

				
					my_list = [1, 2, 3]
print('Original list:',my_list)
new_list = my_list.copy()  # Creates a shallow copy of the list
print('Copied list:',my_list)

# Output -
# Original list: [1, 2, 3]
# Copied list: [1, 2, 3]

Python

methods on list in Python

methods on list in Python

Modification and Manipulation:

list.pop([i]):

Searching and Counting:

Sorting and Reversing:

Other Methods:

Talk to our Industry Experts for Career Counselling

Company

Platform

Resources

Get in touch