PyQt5. How to completely destroy a tab and its contents?

Question

PyQt

There is a qtabwidget.
There is a list of the form a[['file1', None]['file2', None]...] When the button is clicked, the list elements are dynamically filled and tabs are added . I included the closable and movable options. How to throw out the tab and the widget contained in it on the tabCloseRequsted event? I used to remove widgeta
а[i][1] = QTextEdit()tabwidget.addtab(a[i][1], a[i][0])

a[i][1] = None
self.widget(i) = None

, where i is inherited from the tabCloseRequsted event. However, i is just the current location of the tab in the layout. If the tabs were moved or deleted, then I will reset the wrong a[i][1]. ((
If I drop the list, then I won't be able to keep track of which tab names already exist

...
if a[i][1] not None:
...

Please tell me how to remove the correct a[i][1] when closing the tab.
Well, or how to dynamically track which tab names are currently in use without creating my list