完美解决QObject::moveToThread...Cannot move to target thread

安装所需包：

pip install -i https://pypi.tuna.tsinghua.edu.cn/sample pyqt5
sudo pip uninstall opencv-python
sudo apt-get install libopencv-dev python-opencv

安装libqt5x11extras5
sudo apt-get install libqt5x11extras5
如果已经安装了仍然报错，那就卸载之后再使用以上命令重新安装
卸载命令：sudo apt-get remove libqt5x11extras5