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#1 Created at ... [Delete] [Delete and Lock User]

Python 3.5.1下

>>> for n in fib(6):
...     print(n)

结果是 1 1 2 3 5 8 d o n e

这是怎么回事呢？

#2 Created at ... [Delete] [Delete and Lock User]

你把done分成4个字符打印出来了，可能是你的return语句缩进有问题，到while语句里面去了。