torchvision安装填坑

这两天安装torchvision出现了很多坑，这里记录一下。
开始我的torch版本是1.3.1，正常pip安装torchvision

pip install torchvision

安装成功，但是导入的时候出现了问题。

>>> import torchvision
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/sun/my_python3/lib/python3.7/site-packages/torchvision/__init__.py", line 3, in <module>
    from torchvision import models
  File "/home/sun/my_python3/lib/python3.7/site-packages/torchvision/models/__init__.py", line 12, in <module>
    from . import detection
  File "/home/sun/my_python3/lib/python3.7/site-packages/torchvision/models/detection/__init__.py", line 1, in <module>
    from .faster_rcnn import *
  File "/home/sun/my_python3/lib/python3.7/site-packages/torchvision/models/detection/faster_rcnn.py", line 7, in <module>
    from torchvision