Python3中简单的迭代器程序

1.迭代器程序（实现菲比那次数列并且可以抛出与接收异常）

def fib(max):
    n,a,b = 0,0,1
    while n < max:
        #print(b)
        yield b
        a,b = b,a+b
        n= n+1
    return 'done'
g = fib(10)
while True:
    try:
        x = g.__next__()
        print('g:',x)
    except StopIteration as e:
        print('Generator return value:',e.value)
        break

2.利用迭代器实现简单的“单线程并行”吃包子（实际上还是串行）

import time
def consumer(name):
    print('[%s] prepare to eat baozi!!'%name)
    while True:
        baozi = yield
        print('baozi [%s] is coming,ate by [%s]'%(baozi,name))

def producer(name):
    c = consumer('A')
    c2 = consumer('B')
    c.__next__()
    c2.__next__()
    print('start'.center(30,'-'))
    for i in range(10):
        time.sleep(1)
        print('just one,half to half')
        c.send(i)
        c2.send(i)

producer('wt')