>>> import knn1 引入knn1失败报错如下，错误原因为系统无法找到knn1路径，因此，报错。解决办法为引入knn1所在目录，然后再引入knn1
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
ImportError: No module named 'knn1'
>>> import knn1
>>>
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
ImportError: No module named 'knn1'
>>> import sys
>>> sys.path.append('e:p3')>>> import knn1
>>>