PyQt - multiple window instances?

[gregarican]

The window isn't being created as a new class instance or anything. The
main class is the application main window as a whole and this
particular window is just part of that class. I have typed data into
the window, then tried to open up a new window. But when I do the
window where I have typed data disappears and is replaced by a new
window that's blank. What's the easiest way to keep a reference to the
old window?