如圖所示，使用 pip install gexf 以及 lxml 以后，仍然無法 import gexf，報如圖錯誤，請問一下原因是什么呢？我是 python3.6

C:\Users\Administrator>python

Python 3.6.2rc1 (heads/3.6:268e1fb, Jun 17 2017, 19:01:44) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import Gexf
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'Gexf'
>>> import gexf
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python36\lib\site-packages\gexf\__init__.py", line 1, in <module>
    from _gexf import Gexf
ModuleNotFoundError: No module named '_gexf'
>>>