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Python | How to get Subtraction of tuples

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  • Difficulty Level : Basic
  • Last Updated : 18 Aug, 2022
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Sometimes, while working with records, we might have a common problem of subtracting the contents of one tuple with the corresponding index of other tuple. This has application in almost all the domains in which we work with tuple records. Let’s discuss certain ways in which this task can be performed.

Method #1: Using map() + lambda Combination of the above functionalities can solve the problem for us. In this, we compute the subtraction using lambda functions and extend the logic to keys using map(). 

Python3




# Python3 code to demonstrate working of
# Subtraction of tuples
# using map() + lambda
 
# initialize tuples
test_tup1 = (10, 4, 5)
test_tup2 = (2, 5, 18)
 
# printing original tuples
print("The original tuple 1 : " + str(test_tup1))
print("The original tuple 2 : " + str(test_tup2))
 
# Subtraction of tuples
# using map() + lambda
res = tuple(map(lambda i, j: i - j, test_tup1, test_tup2))
 
# printing result
print("Resultant tuple after subtraction : " + str(res))

Output : 

The original tuple 1 : (10, 4, 5)
The original tuple 2 : (2, 5, 18)
Resultant tuple after subtraction : (8, -1, -13)

Method #2: Using map() + sub() The combination of above functions can help us achieve this task. In this, we first extend the logic to all using map() and then perform subtraction of each index using sub(). 

Python3




# Python3 code to demonstrate working of
# Addition of tuples
# using map() + sub()
import operator
 
# initialize tuples
test_tup1 = (10, 4, 5)
test_tup2 = (2, 5, 18)
 
# printing original tuples
print("The original tuple 1 : " + str(test_tup1))
print("The original tuple 2 : " + str(test_tup2))
 
# Addition of tuples
# using map() + sub()
res = tuple(map(operator.sub, test_tup1, test_tup2))
 
# printing result
print("Resultant tuple after subtraction : " + str(res))

Output : 

The original tuple 1 : (10, 4, 5)
The original tuple 2 : (2, 5, 18)
Resultant tuple after subtraction : (8, -1, -13)

Method #3 : Using for loop and tuple() method

Python3




# Python3 code to demonstrate working of
# Subtraction of tuples
 
# initialize tuples
test_tup1 = (10, 4, 5)
test_tup2 = (2, 5, 18)
 
# printing original tuples
print("The original tuple 1 : " + str(test_tup1))
print("The original tuple 2 : " + str(test_tup2))
 
# Subtraction of tuples
res=[]
for i in range(0,len(test_tup1)):
    res.append(test_tup1[i]-test_tup2[i])
res=tuple(res)
# printing result
print("Resultant tuple after subtraction : " + str(res))

Output

The original tuple 1 : (10, 4, 5)
The original tuple 2 : (2, 5, 18)
Resultant tuple after subtraction : (8, -1, -13)

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