生成不对称大小但其元素加到固定和上的组

import itertools

def generate_combinations(elements, target_sum):
    def find_combinations(current_sum, current_group, start_index):
        if current_sum == target_sum:
            result.append(current_group[:])
            return
        if current_sum > target_sum:
            return
        for i in range(start_index, len(elements)):
            current_group.append(elements[i])
            find_combinations(current_sum + elements[i], current_group, i + 1)
            current_group.pop()

    result = []
    find_combinations(0, [], 0)
    return result

# 示例使用
elements = [1, 2, 3, 4, 5]
target_sum = 7
combinations = generate_combinations(elements, target_sum)
for combo in combinations:
    print(combo)