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
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