豆瓣源安装加速

pip install -i https://pypi.doubanio.com/simple/ --trusted-host pypi.doubanio.com 库名字

pip install -i https://pypi.doubanio.com/simple/ --trusted-host pypi.doubanio.com pyqt5

pip install -i https://pypi.doubanio.com/simple/ --trusted-host pypi.doubanio.com pyqt5-tools