1.send
1 def generato(): 2 print('关于send的使用方法') 3 tmp = yield 1 4 print('上面的就是send的应用') 5 print(tmp) 6 yield '现在来测试一下效果吧' 7 8 g = generato() 9 g.__next__() 10 g.send('我们一起学python') 11 # g.send(None) 12 #send 获取下一个值的效果和next基本一致 13 #只是在获取下一个值的时候，给上一yield的位置传递一个数据 14 #使用send的注意事项 15 # 第一次使用生成器的时候 是用next获取下一个值 16 # 最后一个yield不能接受外部的值
2：应用生成器计算移动平均值
1 def averager(): 2 total = 0.0 3 count = 0 4 average = None 5 while True: 6 term = yield average 7 total += term 8 count += 1 9 average = total/count 10 g_avg = averager() 11 print(g_avg.__next__()) 12 print(g_avg.send(10)) 13 print(g_avg.send(30)) 14 15 #升级版 16 def init(func): 17 def inner(*args,**kwargs): 18 g = func(*args, **kwargs) 19 next(g) 20 return g 21 return inner 22 23 @init 24 def averager(): 25 total = 0.0 26 count = 0 27 average = None 28 while True: 29 term = yield average 30 total += term 31 count += 1 32 average = total/count 33 g_avg = averager() 34 print(g_avg.__next__()) 35 print(g_avg.send(10)) 36 print(g_avg.send(30))
3.列表推导式和生成器表达式
egg_list = ['鸡蛋%s' %i for i in range(10)] #列表解析 laomuji = ('鸡蛋%s' %i for i in range(10)) #生成器表达式 print(laomuji) print(next(laomuji)) #和__next__一样 print(laomuji.__next__()) print(next(laomuji)) ''' 鸡蛋0 鸡蛋1 鸡蛋2 '''
