PyQt5：TypeError：'顶级小部件的基类错误'

Question

I have created to .ui files using QtDesigner and I load them into two seperate windows as show below

class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__()

        # Set up the user interface from Designer.
        uic.loadUi("interface/UI/main.ui", self)

        # Connect up the buttons
        self.button_classes.clicked.connect(self.open_classes)

        self.w = []

    def open_classes(self):
        self.w.append(PopupWindow(self))
        self.w[-1].show()


class PopupWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__()

        # Set up the user interface from Designer.
        uic.loadUi("interface/UI/newclass.ui", self)

When I run the code in PyCharm in debug mode, the following error occurs, however this does not happen when the code is run normally

TypeError: ('Wrong base class of toplevel widget', (<class 'controllers.GUI.PopupWindow'>, 'QDialog'))

Answer 1

You have QDialog in message 'Wrong base class of toplevel widget', (<class 'controllers.GUI.NewClassWindow'>, 'QDialog') so I think it expects QDialog to create second window but you use QMainWindow in class PopupWindowONE(QMainWindow):

In other words, check the class type of the .ui file you are going to initiate; if the class is a QDialog then your python class needs to receive a QDialog .

Answer 2

我在使用QDialog时遇到了类似的问题，但将其更改为QMainWindow并且它起作用了。