[FIXED] Override QPushButton to provide additional text

Issue

I just want to extend a QPushButton so it would store an additional long string that I need afterwards.

Solution

The PyQt built-in classes support dynamic attributes, just like ordinary user-defined Python classes:

>>> button = QtWidgets.QPushButton()
>>> button.foo = 'bar'
>>> print(button.foo)
bar

However, you could also use QObject properties, since QPushButton inherits QObject (via QWidget):

>>> button.setProperty('extra', 'additional long string')
>>> button.property('extra')
'additional long string'

One significant difference of this approach, is that unset properties will always return None, rather than raising an error:

>>> button.property('whatever') is None
True

Answered By - ekhumoro