This tutorial tells us how to **Sort a list of tuples by the Second Value **in Python. You can understand sorting by the following example. If you want to learn more about Python Programming, Visit Python Programming Tutorials.

```
Input : [('tech', 21), ('en', 7), ('in', 40)]
Output : [('en', 7), ('tech', 21), ('in', 40)]
Input : [('1', 10), ('3', 5), ('4', 20), ('9', 15)]
Output : [('3', 5), ('1', 10), ('9', 15), ('4', 20)]
```

You can sort a list of tuples either in ascending or descending order. Similarly, you can sort the list of tuples by the first element, second element, or the last element.

**Some of the common methods of sorting a list of tuples by the second value are listed below.**

**Sorting with the first element using Sort() Function.****Sort with the Second element using operator.itemgetter.****Sorting Using Lambda Function.****Using Sorted Function.****Using Bubble Sort Algorithm.**

## Sort list of tuples by first element using sort() function

This function takes a list of tuples that are filled with random numbers. *Sort()* command sorts out the list of the tuples in ascending order by the first element.

### Ascending order

```
#Using Sort() Function
list_Of_Tuples= [(2,8),(1,5),(0,9)]
print(f"Original List of tuples: {list_Of_Tuples}")
list_Of_Tuples.sort()
print(f"List of tuples after sorting: {list_Of_Tuples}")
#Code ends here
```

**OUTPUT:**
Original List of tuples: [(2, 8), (1, 5), (0, 9)]
List of tuples after sorting: [(0, 9), (1, 5), (2, 8)]

### descending order

```
#Using sort() Function for descending order
list_Of_Tuples= [(2,8),(1,5),(0,9)]
list_Of_Tuples.sort(key = lambda x: x[0], reverse=True)
print(list_Of_Tuples)
```

**OUTPUT:**
Original List of tuples: [(2, 8), (1, 5), (0, 9)]
List of tuples after sorting: [(2, 8), (1, 5), (0, 9)]

## Sort the list of tuples by the second element

In this method, we are using the operator statement with the sort() function. You just have to give the index value to the itemgetter(). For example, here we have passed value 1 to the operator.

```
#Sorting by second element
import operator
list_Of_Tuples= [(2,8),(1,5),(0,9)]
print(f"Original List of tuples: {list_Of_Tuples}")
list_Of_Tuples.sort(key=operator.itemgetter(1))
print(f"List of tuples after sorting: {list_Of_Tuples}")
#Code ends here
```

**OUTPUT:**
Original List of tuples: [(2, 8), (1, 5), (0, 9)]
List of tuples after sorting: [(1, 5), (2, 8), (0, 9)]

## using lambda function to sort a list

In this method, we have used the lambda function to sort out the tuples of the list. Here we will give the index in the item to specify which index has to be taken into notice while sorting the whole list of tuples.

```
#Using Lambda Function
list_Of_Tuples = [('Faizan', 1999),('Ali', 1994),('Shahroz', 1990)]
print(f"Original List of tuples: {list_Of_Tuples}")
list_Of_Tuples.sort(key= lambda item:item[1])
print(f"List of tuples after sorting: {list_Of_Tuples}")
#Code ends here
```

**OUTPUT:**
Original List of tuples: [('Faizan', 1999), ('Ali', 1994), ('Shahroz', 1990)]
List of tuples after sorting: [('Shahroz', 1990), ('Ali', 1994), ('Faizan', 1999)]
Here we can see that smallest number 1990 came first then 1994 and at last 1999.

## Using sorted() function TO SORT LIST OF TUPLES BY FIRST OR SECOND VALUE

In this method, we will sort the list of tuples with the help of the *sorted()* function by passing the list into this function instead of making the object.

```
# Using Sorted() Function
price = [('Mutton', '540.3'),('Beaf', '190.3'),('Onion', '20.3')]
print(f"Original List of tuples: {price}")
list_Of_Tuples = sorted(price, key = lambda x: float(x[1]))
print(f"List of tuples after sorting: {list_Of_Tuples}")
# Code ends here
```

**OUTPUT:**
Original List of tuples: [('Mutton', '540.3'), ('Beaf', '190.3'), ('Onion', '20.3')]
List of tuples after sorting: [('Onion', '20.3'), ('Beaf', '190.3'), ('Mutton', '540.3')]

## Using the bubble sort algorithm

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

```
#Code starts here
list = [('John' , 86), ('Joe', 91) , ('Harry', 88) , ('Sam', 84), ('leo', 89)]
index = 1
for i in range(0, len(list)):
for j in range(0, len(list)-i-1):
if (list_[j][index] > list_[j + 1][index]):
temp = list_[j]
list_[j]= list_[j + 1]
list_[j + 1]= temp
print(list)
#Code ends here
```

**Output:**
[('Sam',84), ('John',86), ('Harry',88), ('leo',89), ('Joe',91)]

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