#(如果一个函数定义中包含yield关键字,那么这个函数就不再是一个普通函数,而是一个generator) g = (x * x for x in range(2,10))#创建生成器(()表示生成器、[]列表解析)print(next(g))#只打印第一个元素for i in g:#通过循环遍历元素 print(i)def fib(max): n, a, b = 0, 0, 1 while n < max: yield b a, b = b, a + b n = n + 1 return 'done' f = fib(10)print('fib(10):', f)for x in f: print(x) # call generator manually:g = fib(5)while 1: try: x = next(g) print('g:', x) except StopIteration as e: print('Generator return value:', e.value) break
def odd(): #如果函数中有yield,那么该函数不在是普通函数,而是生成器:generator。 print('step 1') yield 1 print('step 2') yield(3) print('step 3') yield(5)o = odd()#print(o)print(next(o))for i in o:#遍历结果,不然只显示第一条 print(i)