Python program to sort list of tuples alphabetically

Method 1:

One method to solve the problem is by using the bubble sort technique. In this technique, we will be accessing the first element of each tuple and sort using a technique similar to bubble sort.

# Initializing and printing list of tuples 
tupleList = [("python", 3), ("scala", 7), ("C", 1), ("java", 5)]
print("The elements of list of tuples are : " + str(tupleList))  

# Sorting list of tuples alphabetically
n = len(tupleList)
for i in range(n):
    for j in range(n-i-1):
        if tupleList[j][0] > tupleList[j + 1][0]:
            tupleList[j], tupleList[j + 1] = tupleList[j + 1], tupleList[j]

# Printing sorted list 
print("The elements of sorted list of tuples are : " + str(tupleList))

Output:

The elements of list of tuples are : [('python', 3), ('scala', 7), ('C', 1), ('java', 5)]
The elements of sorted list of tuples are : [('C', 1), ('java', 5), ('python', 3), ('scala', 7)]

Method 2:

Another method to solve the problem is by using python's built-in sort() method. The method performs in-place sorting of values in Python.

# Program to sort list of tuples alphabetically using bubble sort, 
 
# Initializing and printing list of tuples 
tupleList = [("python", 3), ("scala", 7), ("C", 1), ("java", 5)]
print("The elements of list of tuples are : " + str(tupleList))  

# Sorting list of tuples alphabetically
sortedTupleList = sorted(tupleList, key = lambda x: x[0])

# Printing sorted list 
print("The elements of sorted list of tuples are : " + str(sortedTupleList))

Output:

The elements of list of tuples are : [('python', 3), ('scala', 7), ('C', 1), ('java', 5)]
The elements of sorted list of tuples are : [('C', 1), ('java', 5), ('python', 3), ('scala', 7)]