I want to set my QGroupBox's title with HTML expressions in python program, 
e.g. :
 ABC. (subscript)
Does anybody have an idea how to do this?
QGroupBox's title property does not support HTML. The only customization you can do through the title string (besides the text itself) is the addition of an ampersand (&) for keyboard accelerators.
In short, unlike QLabel, you can't use HTML with QGroupBox.
How can I set QGroupBox's title with HTML expressions? (Python)