What alternative can I use for event.unicode?

I've just started out coding in python, and I was playing around with text boxes, when I got an error (AttributeError: 'Event' object has no attribute 'unicode'). From what I've found on a few forums, this error is because I use Python 3, but I couldn't find anywhere an alternative I could use.

for event in pygame.event.get():

        # quit
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

        if event.type == pygame.MOUSEBUTTONDOWN:
            if input_rect.collidepoint(event.pos):
                active = True
            else:
                active = False

            if event.type == pygame.KEYDOWN:

                # Check for backspace
                if event.key == pygame.K_BACKSPACE:

                    user_text = user_text[:-1]

            else:
                user_text += event.unicode   # here is where I recieve the error

The exact error is:

 user_text += event.unicode
              ^^^^^^^^^^^^^
AttributeError: 'Event' object has no attribute 'unicode'

I've tried using str, and some other solutions but I didn't manage to implement them.

source https://stackoverflow.com/questions/74928810/what-alternative-can-i-use-for-event-unicode