day14-生成器进阶

'''
def generator():
    print(123)
    yield 1
    print(456)
    yield 2
    print(789)

g = generator()
ret = g.__next__()
print(ret)
ret = g.send(None) # send的效果和_next_一样
print(ret)
'''

def generator():
    print(123)
    content = yield 1
    print(content)
    print(456)
    yield 2

g = generator()
ret = g.__next__()
print(ret)
ret = g.send('hello') # send的效果和_next_一样
print(ret)
# send和_next_效果一样，他在打印出第二个yield之前，还将send里面的hello传给content，所以也会打印出hello。
#result:
# 123
# 1
# hello
# 456
# 2