yield from

# -*- coding: utf-8 -*-
"""
-------------------------------------------------
   File Name：     yield_from_example
   Description :
   Author :       Administrator
   date：          2019/8/11 0011
-------------------------------------------------
"""
final_results = {}


def sales_sum(pro_name):
    """
    子生成器
    :param pro_name:
    :return:
    """
    total = 0
    nums = []
    while True:
        x = yield
        print(pro_name + "销量", x)
        if not x:
            break
        total += x
        nums.append(x)
    return (total,nums)


def middle(key):
    """
    委托生成器
    :param key: 
    :return:
    """
    while True:
        final_results[key] = yield from sales_sum(key)
        print(key + "销量统计完成 ！.")


def main():
    data_sets = {
        "bobby牌面膜": [1200, 1500, 3000],
        "bobby牌手机": [1200, 1500, 4000],
        "bobby牌大一": [1800, 1500, 3000],
    }
    for key, data_set in data_sets.items():
        print("start key:", key)
        m = middle(key)
        m.send(None)
        for value in data_set:
            m.send(value)
        m.send(None)

    print("final result is:", final_results)


if __name__ == "__main__":
    main()