raise Exception("PyQtGraph requires one of PyQt5, PyQt6, PySide2 or PySide6; none of these packages could be imported.")
Exception: PyQtGraph requires one of PyQt5, PyQt6, PySide2 or PySide6; none of these packages could be imported.
下载pyside6利用清华镜像源，更快
# pip install -i https://pypi.tuna.tsinghua.edu.cn/simple pyside6
ModuleNotFoundError: No module named 'PyQt5'
pip install PyQt5
NameError: name 'QMainWindow' is not defined
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.
sudo apt install libxcb-xinerama0
NameError: name 'QMainWindow' is not defined
原来的pyqt5安装在python3下了，虚拟环境是2.7，先卸载了
pip install PyQt5
在虚拟环境下安装，下载时间很漫长，哎
pip install python-qt5
下载多次失败，观察numpy包也显示找不到，把路径放到了setting，所有错误都没有了
