Python-生成器_36

#生成器函数

def generator():
    print(1)
    return 'a'

ret = generator()
print(ret)

#只要含有yield关键字的函数都是生成器函数
# yield不能和return共用且需要写在函数内
def generator():
    print(1)
    yield 'a'
# #生成器函数 ： 执行之后会得到一个生成器作为返回值
ret = generator()
print(ret)
print(ret.__next__())


#<generator object generator at 0x0000021E4A067570>
#1
#a

def generator():
    print(1)
    yield 'a'
    print(2)
    yield 'b'
    yield 'c'
g = generator()



# for i in g:
#     print(i)
ret = g.__next__()
print(ret)
ret = g.__next__()
print(ret)
ret = g.__next__()
print(ret)

#娃哈哈%i
def wahaha():
    for i in range(200):
        yield '娃哈哈%s'%i
g = wahaha()
for i in g:
    print(i)
g1 = wahaha()

print('*******',g.__next__())

def wahaha():
    for i in range(200):
        yield '娃哈哈%s'%i

g = wahaha()
g1 = wahaha()

print(g.__next__())
print(g1.__next__())


#娃哈哈0

#娃哈哈0

l = [1,2,3,4,5]
for i in l:
    print(i)
    if i == 2:
        break

for i in l:
    print(i)

def wahaha():
    for i in range(200):
        yield '娃哈哈%s'%i

g = wahaha()
count = 0

for i in g:
    count +=1
    print(i)
    if count > 50:
         break

print('*******',g.__next__())

for i in g:
    count +=1
    print(i)
    if count > 100:
        break