Finding Number Pairs to Reach a Target Sum

This function takes a list of numbers and a target sum, then returns a pair of numbers that add up to the target sum. If no such pair is found, it returns None.

Technology Stack : List (list), Dictionary (dict)

Code Type : Algorithm

Code Difficulty : Intermediate

                
                    
def sum_pairs(numbers, target_sum):
    seen = {}
    for number in numbers:
        if target_sum - number in seen:
            return (target_sum - number, number)
        seen[number] = True
    return None