如何在虚拟环境下导入Jetson nano上的cv2？

Question

如果您没有使用virtualenv，则cv2模块导入成功

nano@nano:~$ python3
Python 3.6.7 (default, Oct 22 2018, 11:32:17) 
[GCC 8.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>> cv2.__version__
'3.3.1'
>>> 

但是，如果创建虚拟环境，则找不到cv2

(env) nano@nano:~$ python3
Python 3.6.7 (default, Oct 22 2018, 11:32:17) 
[GCC 8.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'cv2'

Answer 1

更具体地说，您似乎需要将opencv简化为：

首先: cd进入您的_venv/lib/python3.6/site-package

和：

ln -s /usr/lib/python3.6/dist-packages/cv2.cpython-36m-aarch64-linux-gnu.so cv2.cpython-36-m-aarch64-linux-gnu.so

Answer 2

您可以将目录/usr/local/lib/python3.6/dist-packages/cv2/复制到虚拟环境文件夹中，例如env/lib/python3.6/dist-packages/cv2/

Answer 3

您可以在虚拟环境中安装opencv，也可以在bashrc中将库符号链接到虚拟环境。

ln -s source_file destination_file