Python yield example: integer combination generator

sum_max_min_combo_gen.py

from typing import List, Any, Generator

def minmaxpartition(_sum: int, _count: int, _min: int, _max: int
                    ) -> Generator[List[Any], None, None]:
    if _min > _max:
        yield []
        return
    
    if _sum < _count * _min:
        yield []
        return
    elif _sum > _count * _max:
        yield []
        return
    
    if _count == 1:
        yield [_sum]
        return
    
    for j in range(_max, _min-1, -1):
        for return_list in minmaxpartition(_sum-j, _count-1, _min, j):
            if return_list:
                yield [j] + return_list

def main():
    _sum = 51
    _numbers = 3
    _min = 14
    _max = 19    
    for return_list in minmaxpartition(_sum, _numbers, _min, _max):
        print(return_list)
    

if __name__ == "__main__":
    print("main function begins")
    main()
    print("main function ended without hassle")