ImportError: libSM.so.6 libXrender.so.1 libXext.so.6 docker opencv

在docker虚拟机下安装了opencv以后，在使用的时候出现以下报错，

Traceback (most recent call last):
  File "data_generator.py", line 24, in <module>
    import cv2
  File "/usr/local/lib/python3.5/dist-packages/cv2/__init__.py", line 3, in <module>
    from .cv2 import *
ImportError: libSM.so.6: cannot open shared object file: No such file or directory
 

Traceback (most recent call last):
  File "Det_Classifier.py", line 5, in <module>
    import cv2
  File "/usr/local/lib/python3.5/dist-packages/cv2/__init__.py", line 3, in <module>
    from .cv2 import *
ImportError: libXrender.so.1: cannot open shared object file: No such file or directory

Traceback (most recent call last):
  File "Det_Classifier.py", line 5, in <module>
    import cv2
  File "/usr/local/lib/python3.5/dist-packages/cv2/__init__.py", line 3, in <module>
    from .cv2 import *
ImportError: libXext.so.6: cannot open shared object file: No such file or directory
 

# Install

$ apt-get update

$ apt-get install apt-file

# Update apt-file

$ apt-file update

下载过程中会出现一次性下载失败的情况，多执行几次，或者改一下源的地址

$ apt-file search libSM.so.6

$apt-get install libsm6x

$apt-get install libxrender1

$apt-get install libxext-dev