Python3. Classes, Inheritance

Question

...
from PyQt4.QtGui import * 
from PyQt4.QtCore import *

class UserInfoModalWindow(QDialog): 
    def init(self):                                
        super(UserInfoModalWindow, self).init() 
        self.dialog_window = QDialog(self) 
        ... 
        self.dialog_window.exec_() 
        ... 
    def quit(self): 
        self.dialog_window.close()

...

class AcceptDialogWindow(UserInfoModalWindow):
    def init(self):
        super(UserInfoModalWindow, self).init() 
        self.accept_dialog = QDialog()
        ...
        self.accept_button = QPushButton()
        self.cancel_button = QPushButton()
        ... 
        self.connect(self.accept_button, 
                     SIGNAL('clicked()'), 
                     lambda: self.quit()) 
        self.connect(self.cancel_button, 
                     SIGNAL('clicked()'), 
                     self.accept_dialog.close)
        ... 
        self.accept_dialog.exec_() 
    ... 
    # From this method I want to call a method from a parent class 
    def quit(self): 
        self.accept_dialog.close() 
        return super(UserInfoModalWindow, self).quit()

When clicked 'cancel_button' - only accept_dialog closes, that's right, however when clicked 'accept_button' - accept_dialog AND dialog_window should be closed.

I get this error: File "app.py", line 252, in quit
return super(UserInfoModalWindow, self).quit() 
AttributeError: 'super' object has no attribute 'quit'

What is the issue? What did I do wrong?

You're using a Python 2 way of doing things here.

Mad Physicist
– Mad Physicist

2018-09-18 12:01:01 +00:00
Commented Sep 18, 2018 at 12:01 — Mad Physicist
– Mad Physicist, Commented Sep 18, 2018 at 12:01

bruno desthuilliers · Accepted Answer · 2018-09-18 11:57:54Z

1

Here:

return super(UserInfoModalWindow, self).quit()

You want:

return super(AcceptDialogWindow, self).quit()

super() first argument is supposed to be the current class (for most use case at least). Actually super(cls, self).method() means:

get the mro of self
locate class cls in the mro
take the next class (the one after cls)
execute the method from this class

So super(UserInfoModalWindow, self) in AcceptDialogWindow resolves to the parent of UserInfoModalWindow, which is QDialog.

Note that in Python 3.x, you don't have to pass any argument to super() - it will automagically do the RightThing(tm).

edited Sep 18, 2018 at 11:57

answered Sep 18, 2018 at 11:51

bruno desthuilliers

78.3k6 gold badges102 silver badges129 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Mad Physicist Over a year ago

You should probably mention plain no arg super()

Alexander Over a year ago

Thanks a lot, I got it.

Collectives™ on Stack Overflow

Python3. Classes, Inheritance

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related