复习：
获取移动平均值
# 移动平均值 # avg = sum / count def average(): sum = 0 count = 0 avg = 0 while 1: num = yield avg sum += num count +=1 avg = sum/count avg = average() avg.__next__() avg1 = avg.send(10) print(avg1)
生成器表达式：
g = (i for i in range(10)) for i in g: print(i)
列表推导式
a = [x for x in range(10)] print(a)
生成器表达式与列表表达式区别：
括号不一样
返回值不一样，生成器表达式几乎不占用内存。