window安装openVC 错误 from . import cv2 ImportError: DLL load failed

使用pip 直接安装的opencv 无法正常使用

pip install  opencv_python

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python
>>>import cv2
Traceback (most recent call last):

File "<ipython-input-1-72fbbcfe2587>", line 1, in <module>
import cv2

File "C:\Users\Z.Y\.conda\envs\python35\lib\site-packages\cv2\__init__.py", line 7, in <module>
from . import cv2

ImportError: DLL load failed: 找不到指定的模块。

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操作系统 win10 64位 

python ==3.6

问题原因：pip 安装的版本不对 

解决办法：卸载原始版本,安装新的版本

pip uninstall opencv_python

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去官网下载对应的版本 
http://www.lfd.uci.edu/~gohlke/pythonlibs/#opencv

pip install opencv_python‑3.2.0‑cp36‑cp36m‑win32.whl (32-bit version)
pip install opencv_python‑3.2.0‑cp36‑cp36m‑win_amd64.whl (64-bit version)
python
>>import cv2