树莓派中import cv2错误

import cv2
File “/xx/.venv/lib/python3.7/site-packages/cv2/init.py”
from .cv2 import *
ImportError: libcblas.so.3: cannot open shared object file: No such file or directory

1.执行 sudo apt-get install python3 命令安装python3

sudo apt-get install python3

2.执行 python3 -V 查看 python3是否安装成功

python3 -V

3.执行 pip3 install opencv-python

pip3 install opencv-python

4.执行 pip3 list 验证 pip3中是否安装了opencv-python

pip3 list

5.代码中import cv2，提示以下错误:

import cv2
File “/xx/.venv/lib/python3.7/site-packages/cv2/init.py”
from .cv2 import *
ImportError: libcblas.so.3: cannot open shared object file: No such file or directory

此时出现了个坑，报错：ImportError:libcblas.so.3:cannot open shared object file:No such file or directory
这个报错的意思是没有安装libcblas的库，此时安装Blas 的依赖项就解决了。安装libcblas库的命令是：

sudo apt-get install libatlas-base-dev

或者

sudo apt-get install libgflags-dev

sudo apt-get install libgoodle-glog-dev
sudo apt-get install liblmdb-dev
sudo apt-get install python
sudo apt-get install python-dev
sudo apt-get install python-numpy
sudo apt-get install ipython
sudo apt-get install ipython-notebook
sudo apt-get install python-sklearn
sudo apt-get install python-skimage
sudo apt-get install python-protobuf

From：https://my.oschina.net/u/4371092/blog/3406535

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