生成器的阐释

# def xiadan():
#     ret = []
#     for i in range(10):
#         ret.append('母鸡下蛋%s' %i)
#     return ret
# l = xiadan()
# print(l)

# def xiadan():
#     for i in range(100):
#         yield '母鸡下蛋%s' %i
# res = xiadan()
# print(res.__next__())
# print(res.__next__())  ##生成器只能遍历一次


# def test():
#     print('开始了')
#
#     fisrt = yield 1
#     print('第一次',fisrt)
#
#     yield 2
#     print('第二次')
# t = test()
# res = t.__next__()
# res = t.__next__()
#
# print(res)
# t.send(None)   #可以触发生成器执行
# res = t.send('函数停留在哪儿，我就在哪儿赋值')   #可以触发生成器执行
# print(res)

# {'name':'袁','qian':1}
# {'name':'里','qian':2}
# {'name':'三','qian':3}
# {'name':'四','qian':4}
# {'name':'五','qian':5}
#

# def get_polulation():
#     ret = []
#     with open('人口普查.py','r',encoding='utf-8') as f:
#         for i in f:
#             ret.append(i)
#         return ret
# l = get_polulation()
#
# print(l)


# def get_polulation():
#
#     with open('人口普查.py','r',encoding='utf-8') as f:
#         for i in f:
#             yield i
# l = get_polulation()
# # l1 = eval(l.__next__())
# print(type(l1))
# res = 0
# for p in l:
#     pp = eval(p)
#     print(pp['qian'])
#     res+=pp['qian']
# print(res)

# a = sum(eval(i)['qian'] for i in l)
#
# print(a)




# 生产者消费模型

# import time
# def producer():
#     ret = []
#     for i in range(10):
#         time.sleep(0.1)
#         ret.append('包子%s' %i)
#     return ret
#
# def consumer(res):
#     for index,baozi in enumerate(res):
#         time.sleep(0.1)
#         print('第%s几回，吃了%s' %(index,baozi))
#
# res = producer()
#
# consumer(res)

# def text():
#     print('你好呀 臭弟弟')
#     yu = yield 1
#     print('奥利给',yu)
#     yield 2
#     print('精神小伙')
#     yield 999
#
# l = text()
# print(l.__next__())
# # print(l.__next__())
# # print(l.__next__())
# l.send(None)

# import time
# def consumer(name):
#     print('我是[%s],我准备开始吃包子了' %name)
#     while True:
#         baozi = yield
#         time.sleep(0.2)
#         print('%s 很开心的把[%s]喝了' %(name,baozi))
#
# def producer():
#     c1 = consumer('wanqi')
#     c2 = consumer('yuanhao')
#     c1.__next__()
#     c2.__next__()
#     for i in range(10):
#         time.sleep(0.5)
#         c1.send('包子 %s' %i)
#         c2.send('包子%s' %i)
# producer()