1 def f1(): 2     print(11) 3     yield 1 4  5     print(22) 6     yield 2 7  8     print(33) 9     yield 310 11     print(44)12     yield 413 14 f11 = f1()15 ret = f11.__next__()16 print(ret)17 ret = f11.__next__()18 print(ret)19 ret = f11.__next__()20 print(ret)21 ret = f11.__next__()22 print(ret)

 结果：

11

1

22

2

33

3

44

4