# tag1 = {'name': 'dahai'}
# # print(bool(tag1))
# # tag1 = {}
# del tag1['name']
# if tag1:
#     print('数据类型自带True')
# else:
#     print('数据类型自带False')


def find_solution():
    for i in range(10):
        for j in range(10):
            if i * j == 20:
                yield i, j


for solution in find_solution():
    print(id(solution))
    print(type(solution))
    print("Found at:", solution)
    break

print('finish')