Python – Tuple Matrix Columns Summation

Sometimes, while working with Tuple Matrix, we can have a problem in which we need to perform summation of each column of tuple matrix, at the element level. This kind of problem can have application in Data Science domains. Let’s discuss certain ways in which this task can be performed.

Input : test_list = [[(4, 5), (1, 2)], [(2, 4), (4, 6)]]
Output : [(6, 9), (5, 8)]

Input : test_list = [[(4, 5), (1, 2), (6, 7)]]
Output : [(4, 5), (1, 2), (6, 7)]

Method #1 : Using list comprehension + zip() + sum()
The combination of above functions can be used to solve this problem. In this, we perform the task of sum using sum() and zip() is used to perform column wise pairing of all elements.

# Python3 code to demonstrate working of
# Tuple Matrix Columns Summation
# Using list comprehension + zip() + sum()

# initializing lists
test_list = [[(4, 5), (3, 2)], [(2, 2), (4, 6)], [(3, 2), (4, 5)]]

# printing original list
print("The original list is : " + str(test_list))

# Tuple Matrix Columns Summation
# Using list comprehension + zip() + sum()
res = [tuple(sum(ele) for ele in zip(*i)) for i in zip(*test_list)]

# printing result
print("Tuple matrix columns summation : " + str(res))

Output :

The original list is : [[(4, 5), (3, 2)], [(2, 2), (4, 6)], [(3, 2), (4, 5)]]
Tuple matrix columns summation : [(9, 9), (11, 13)]

Method #2 : Using map() + list comprehension + zip()
The combination of above functions can be used to solve this problem. In this, we perform the task of extension of sum() using map() and rest of the functionalities are performed similar to above method.

# Python3 code to demonstrate working of
# Tuple Matrix Columns Summation
# Using map() + list comprehension + zip()

# initializing lists
test_list = [[(4, 5), (3, 2)], [(2, 2), (4, 6)], [(3, 2), (4, 5)]]

# printing original list
print("The original list is : " + str(test_list))

# Tuple Matrix Columns Summation
# Using map() + list comprehension + zip()
res = [tuple(map(sum, zip(*ele))) for ele in zip(*test_list)]

# printing result
print("Tuple matrix columns summation : " + str(res))

Output :

The original list is : [[(4, 5), (3, 2)], [(2, 2), (4, 6)], [(3, 2), (4, 5)]]
Tuple matrix columns summation : [(9, 9), (11, 13)]