def func(): print(‘第一次‘) yield 1 print(‘第二次‘) yield 2 print(‘第三次‘) yield 3 print(‘第四次‘) g=func() print(g) # 生成器就是迭代器 g.__iter__() g.__next__()
res1=g.__next__() print(res1) res2=g.__next__() print(res2) res3=g.__next__() print(res3) res4=g.__next__() len(‘aaa‘) # ‘aaa‘.__len__() next(g) # g.__next__() iter(可迭代对象) # 可迭代对象.__iter__()
def my_range(start,stop,step=1): # print(‘start...‘) while start < stop: yield start start+=step # print(‘end....‘) g=my_range(1,5,2) # 1 3 print(next(g)) print(next(g)) print(next(g)) for n in my_range(1,7,2): print(n)
def dog(name):
print(‘道哥%s准备吃东西了...‘ % name)
while True:
# x拿到的是yield接收到的值
x = yield # x = ‘一根骨头‘
print(‘道哥%s吃了 %s‘ % (name, x))
g = dog(‘alex‘)
g.send(None) # 等同于next(g),先完成初始化
g.send(‘一根骨头‘)
# g.send(‘一根骨头‘,‘肉包子‘) # 不能传2个值,会报错:TypeError: send() takes exactly one argument (2 given)
g.send([‘一根骨头‘,‘肉包子‘]) # 可以放到列表里传输,列表算是一个值
g.send(‘肉包子‘)
g.send(‘一桶泔水‘)
# g.close()
# g.send(‘1111‘) # 关闭之后无法传值
def dog(name):
food_list = []
print(‘大哥%s准备吃东西了...‘ % name)
while True:
# x拿到的是yield接收到的值
# x = yield 111 # x = [‘一根骨头‘,‘肉包子‘]
x = yield food_list # x = [‘一根骨头‘,‘肉包子‘]
print(‘大哥%s抽了 %s‘ % (name, x))
food_list.append(x)
g = dog(‘egon‘)
res = g.send(None) # 等同于next(g),先完成初始化
print(res)
res = g.send([‘一个鞭炮‘,‘一根烟‘])
print(res)
res = g.send(‘一个地雷‘)
print(res)
def func():
print(‘start...‘)
x = yield 111
print(‘H哈哈‘)
print(‘H哈哈‘)
print(‘H哈哈‘)
yield 222
g = func()
res = next(g)
print(res)
res = g.send(‘xxxx‘)
print(res)
原文:https://www.cnblogs.com/zhww/p/12983961.html