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Python – All pair combinations of 2 tuples

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  • Difficulty Level : Medium
  • Last Updated : 03 Jul, 2020

Sometimes, while working with Python tuples data, we can have a problem in which we need to extract all possible combination of 2 argument tuples. This kind of application can come in Data Science or gaming domains. Let’s discuss certain ways in which this task can be performed.

Input : test_tuple1 = (7, 2), test_tuple2 = (7, 8)
Output : [(7, 7), (7, 8), (2, 7), (2, 8), (7, 7), (7, 2), (8, 7), (8, 2)]

Input : test_tuple1 = (9, 2), test_tuple2 = (7, 8)
Output : [(9, 7), (9, 8), (2, 7), (2, 8), (7, 9), (7, 2), (8, 9), (8, 2)]

Method #1 : Using list comprehension
This is one of the ways in which this task can be performed. In this, we perform task of forming one index combination in one pass, in other pass change the index, and add to the initial result list.




# Python3 code to demonstrate working of 
# All pair combinations of 2 tuples
# Using list comprehension
  
# initializing tuples
test_tuple1 = (4, 5)
test_tuple2 = (7, 8)
  
# printing original tuples
print("The original tuple 1 : " + str(test_tuple1))
print("The original tuple 2 : " + str(test_tuple2))
  
# All pair combinations of 2 tuples
# Using list comprehension
res =  [(a, b) for a in test_tuple1 for b in test_tuple2]
res = res +  [(a, b) for a in test_tuple2 for b in test_tuple1]
  
# printing result 
print("The filtered tuple : " + str(res))

Output :

The original tuple 1 : (4, 5)
The original tuple 2 : (7, 8)
The filtered tuple : [(4, 7), (4, 8), (5, 7), (5, 8), (7, 4), (7, 5), (8, 4), (8, 5)]

 

Method #2 : Using chain() + product()
The combination of above functions provide yet another way to solve this problem. In this, we perform task of pair creation using product() and chain() is used to add both the results from product() used twice.




# Python3 code to demonstrate working of 
# All pair combinations of 2 tuples
# Using chain() + product()
from itertools import chain, product
  
# initializing tuples
test_tuple1 = (4, 5)
test_tuple2 = (7, 8)
  
# printing original tuples
print("The original tuple 1 : " + str(test_tuple1))
print("The original tuple 2 : " + str(test_tuple2))
  
# All pair combinations of 2 tuples
# Using chain() + product()
res = list(chain(product(test_tuple1, test_tuple2), product(test_tuple2, test_tuple1)))
  
# printing result 
print("The filtered tuple : " + str(res))

Output :

The original tuple 1 : (4, 5)
The original tuple 2 : (7, 8)
The filtered tuple : [(4, 7), (4, 8), (5, 7), (5, 8), (7, 4), (7, 5), (8, 4), (8, 5)]


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