在Docker容器端运行#labelImg出现这个报错，我用#ldd /usr/local/lib/python3.6/dist-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so，把缺失的库都给安装上了，但是仍然报以下的错误： Got keys from plugin meta data ("xcb") QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforms" ... loaded library "/usr/local/lib/python3.6/dist-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so" qt.qpa.xcb: could not connect to display qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found. This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem. Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.