Given Tuple list, compute bidirectional tuples.
Input : test_list = [(5, 6), (1, 2), (6, 5), (9, 1), (6, 5), (2, 1)]
Output : 3
Explanation : (1, 2), (2, 1); (5, 6) -> [(6, 5), (6, 5)], total 3 pairs.Input : test_list = [(5, 6), (1, 3), (6, 5), (9, 1), (6, 5), (2, 1)]
Output : 2
Explanation : (5, 6) -> [(6, 5), (6, 5)], total 2 pairs.
Method : Using loop
In this we check for each element if we have any other element which is bidirectional, Once the pair is found, counter is incremented.
Python3
# Python3 code to demonstrate working of # Count Bidirectional Tuple Pairs # Using loop # initializing list test_list = [(5, 6), (1, 2), (6, 5), (9, 1), (6, 5), (2, 1)] # printing original list print("The original list is : " + str(test_list)) res = 0for idx in range(0, len(test_list)): for iidx in range(idx + 1, len(test_list)): # checking bidirection if test_list[iidx][0] == test_list[idx][1] and test_list[idx][1] == test_list[iidx][0]: res += 1 # printing result print("Bidirectional pairs count : " + str(res)) |
Output:
The original list is : [(5, 6), (1, 2), (6, 5), (9, 1), (6, 5), (2, 1)]
Bidirectional pairs count : 3
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