Many times, while working with records, we can have a problem in which we need to change the value of tuple elements. This is a common problem while working with tuples. Let’s discuss certain ways in which K can be multiplied to Nth element of tuple in list.
Method #1 : Using loop
Using loops this task can be performed. In this, we just iterate the list to change the Nth element by predefined value K in code.
# Python3 code to demonstrate working of # Constant Multiplication to Nth Column # Using loop # Initializing list test_list = [(4, 5, 6), (7, 4, 2), (9, 10, 11)] # printing original list print("The original list is : " + str(test_list)) # Initializing N N = 1 # Initializing K K = 3 # Constant Multiplication to Nth Column # Using loop res = [] for i in range(0, len(test_list)): res.append((test_list[i][0], test_list[i][N] * K, test_list[i][2])) # printing result print("The tuple after multiplying K to Nth element : " + str(res)) |
The original list is : [(4, 5, 6), (7, 4, 2), (9, 10, 11)] The tuple after multiplying K to Nth element : [(4, 15, 6), (7, 12, 2), (9, 30, 11)]
Method #2 : Using list comprehension
This method is having the same approach as the above method, just reduces lines of code using list comprehension functionality to make code compact by size.
# Python3 code to demonstrate working of # Constant Multiplication to Nth Column # Using list comprehension # Initializing list test_list = [(4, 5, 6), (7, 4, 2), (9, 10, 11)] # printing original list print("The original list is : " + str(test_list)) # Initializing N N = 1 # Initializing K K = 3 # Constant Multiplication to Nth Column # Using list comprehension res = [(a, b * K, c) for a, b, c in test_list] # printing result print("The tuple after multiplying K to Nth element : " + str(res)) |
The original list is : [(4, 5, 6), (7, 4, 2), (9, 10, 11)] The tuple after multiplying K to Nth element : [(4, 15, 6), (7, 12, 2), (9, 30, 11)]
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