Windows without borders in pyqt5

Overwrite the following methods Source :

   def mousePressEvent(self, event):
        if event.button() == Qt.LeftButton:
            self.dragPosition = event.globalPos() - self.frameGeometry().topLeft()
            event.accept()

    def mouseMoveEvent(self, event):
        if event.buttons() == Qt.LeftButton:
            self.move(event.globalPos() - self.dragPosition)
            event.accept()

I have a project that does what you want, you can take it as an example, I use it in the Background class link :

Here I put all the available options listed in the documentation :

Qt::MSWindowsFixedSizeDialogHint;
Qt::X11BypassWindowManagerHint;
Qt::FramelessWindowHint;
Qt::NoDropShadowWindowHint;
Qt::WindowTitleHint;
Qt::WindowSystemMenuHint;
Qt::WindowMinimizeButtonHint;
Qt::WindowMaximizeButtonHint;
Qt::WindowCloseButtonHint;
Qt::WindowContextHelpButtonHint;
Qt::WindowShadeButtonHint;
Qt::WindowStaysOnTopHint;
Qt::WindowStaysOnBottomHint;
Qt::CustomizeWindowHint;

In your specific case I understand that you want to use several flags at the same time to get what you want. For example, in this response expose:

If the window is a widget:

w.setWindowFlags(Qt::Widget | Qt::FramelessWindowHint | Qt::CustomizeWindowHint);

If it's a normal Window:

w.setWindowFlags(Qt::Window | Qt::FramelessWindowHint | Qt::CustomizeWindowHint);

If it's a dialog :

w.setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint | Qt::CustomizeWindowHint);