# How to Sort List of Tuples in Python

Vaibhhav Khetarpal Feb 02, 2024

In Python, multiple items can be stored in a single variable using Tuples. A list of Tuples can be sorted like a list of integers.

This tutorial will discuss different methods to sort a list of tuples based on the first, second, or ith element in the tuples.

## Use the `list.sort()` Function to Sort List of Tuples in Python

The `list.sort()` function sorts the elements of a list in ascending or descending order. Its `key` parameter specifies the value to be used in the sorting. `key` shall be a function or other callables that could be applied to each list element.

The following code sorts the tuples based on the second element in all the tuples.

``````list_students = [
("Vaibhhav", 86),
("Manav", 91),
("Rajesh", 88),
("Sam", 84),
("Richie", 89),
]

# sort by second element of tuple
list_students.sort(key=lambda x: x[1])  # index 1 means second element

print(list_students)
``````

Output:

``````[('Sam',84), ('Vaibhhav',86), ('Rajesh',88), ('Richie',89), ('Manav',91)]
``````

The order can be reversed to descending by setting the `reverse` parameter of the `sort()` method to be `True`.

The following code sorts the list of tuples in descending order by using the `reverse` parameter.

``````list_students = [
("Vaibhhav", 86),
("Manav", 91),
("Rajesh", 88),
("Sam", 84),
("Richie", 89),
]

# sort by second element of tuple
list_students.sort(key=lambda x: x[1], reverse=True)

print(list_students)
``````

Output:

``````[('Manav',91), ('Richie',89), ('Rajesh',88), ('Vaibhhav',86), ('Sam',84)]
``````

## Use the Bubble Sort Algorithm to Sort the List of Tuples in Python

Bubble Sort is one of the simplest sorting algorithms; it works by swapping the adjacent elements in a list if they are in the wrong order and repeats this step until the list is sorted.

The following code sorts the tuples based on the second element and uses the bubble sort algorithm.

``````list_ = [("Vaibhhav", 86), ("Manav", 91), ("Rajesh", 88), ("Sam", 84), ("Richie", 89)]

# sort by second element of tuple
pos = 1
list_length = len(list_)

for i in range(0, list_length):
for j in range(0, list_length - i - 1):
if list_[j][pos] > list_[j + 1][pos]:
temp = list_[j]
list_[j] = list_[j + 1]
list_[j + 1] = temp

print(list_)
``````

Output:

``````[('Sam',84), ('Vaibhhav',86), ('Rajesh',88), ('Richie',89), ('Manav',91)]
``````

The `pos` variable specifies the position by which sorting has to be carried out, which in this case, is the second element.

We can also use the first element to sort the list of tuples. The following program implements this.

``````list_ = [("Vaibhhav", 86), ("Manav", 91), ("Rajesh", 88), ("Sam", 84), ("Richie", 89)]

# sort by first element of tuple
pos = 0
list_length = len(list_)
for i in range(0, list_length):
for j in range(0, list_length - i - 1):
if list_[j][pos] > list_[j + 1][pos]:
temp = list_[j]
list_[j] = list_[j + 1]
list_[j + 1] = temp

print(list_)
``````

Output:

``````[('Manav',91), ('Rajesh',88), ('Richie',89), ('Sam',84), ('Vaibhhav',86)]
``````

Vaibhhav is an IT professional who has a strong-hold in Python programming and various projects under his belt. He has an eagerness to discover new things and is a quick learner.