python2切换到python3之后，快速安装依赖

python2切换到python3之后，快速安装依赖

1、导出依赖到requirements.txt

pip freeze > requirement.txt

2、pip升级到pip3

python3 -m pip install --user --upgrade pip

3、pip3根据requirements.txt安装依赖

pip3 install -r requirements.txt

 

如果pip3 install报错subprocess.CalledProcessError: Command '('lsb_release', '-a')' returned non-zero exit status 1

输入：
sudo mv /usr/bin/lsb_release /usr/bin/lsb_release_bak

解决

参考https://github.com/pypa/pip/issues/4924