# Python - Make pair from two list such that elements are not same in pairs

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In this article, we are going to learn how to make pairs from two lists such that no similar elements make a pair. Follow the below steps to solve the problem.

• Initialize the lists with elements.
• Iterate over the lists and append the pair into a list if the corresponding elements from the lists are not same.
• Print the result.

## Example

Let's see the code.

# initializing the lists
list_1 = [1, 2, 3, 4, 5]
list_2 = [5, 8, 7, 1, 3, 6]

# making pairs
result = [(i, j) for i in list_1 for j in list_2 if i != j]

# printing the result
print(result)

If you run the above code, then you will get the following result.

## Output

[(1, 5), (1, 8), (1, 7), (1, 3), (1, 6), (2, 5), (2, 8), (2, 7), (2, 1), (2, 3), (2, 6), (3, 5), (3, 8), (3, 7), (3, 1), (3, 6), (4, 5), (4, 8), (4, 7), (4, 1), (4, 3), (4, 6), (5, 8), (5, 7), (5, 1), (5, 3), (5, 6)]


We can solve the problem with itertools module as well. It provides a method called product that makes pairs of all the elements. We can filter the pairs after finding the pairs.

## Example

Let's see the code.

# importing the module
import itertools

# initializing the lists
list_1 = [1, 2, 3, 4, 5]
list_2 = [5, 8, 7, 1, 3, 6]

# pairs
pairs = itertools.product(list_1, list_2)

# filtering the pairs
result = [pair for pair in pairs if pair[0] != pair[1]]

# printing the result
print(result)

If you run the above code, then you will get the following result.

## Output

[(1, 5), (1, 8), (1, 7), (1, 3), (1, 6), (2, 5), (2, 8), (2, 7), (2, 1), (2, 3), (2, 6), (3, 5), (3, 8), (3, 7), (3, 1), (3, 6), (4, 5), (4, 8), (4, 7), (4, 1), (4, 3), (4, 6), (5, 8), (5, 7), (5, 1), (5, 3), (5, 6)]


## Conclusion

If you run the above code, then you will get the following result.

Published on 13-Nov-2020 17:27:24