PyQt window closes immediately after opening

Question

I am getting an issue when trying to open a PyQt window.

The code below is an example of my original code. When I imported the module in import Test and

Answer 1

You need to keep a reference to the opened window, otherwise it goes out of scope and is garbage collected, which will destroy the underlying C++ object also. Try:

def Start():
    m = myWindow()
    m.show()
    return m


class myWindow():....

if __name__ == "__main__":
    import sys
    app = QApplication(sys.argv)
    window = Start()
    app.exec_()

Answer 2

You can also do:

def Start():
    global m
    m = myWindow()
    m.show()

class myWindow():....

if __name__ == "__main__":
    import sys
    app = QApplication(sys.argv)
    window = Start()
    app.exec_()