Limiting Input to one character and getting input without needing to press enter in Jupyter Notebook

Question

So basically I am writing code in jupyter which is suppose to act like a keyboard feedback system. It has to recognize which key is pressed and provide audio feedback to let the used know what key is pressed. I got the feedback part down but I am struggling to figure out a way for the user to press the key and the code picks up on which key is pressed. For example I start of by letting the user know that the code is running. Then if the user presses 3 the code will say "Three" and if the "b" key is pressed the code will output saying "B for ball". I wanna limit the user to only 1 character input and I don't want the user to keep pressing "enter" every single time a new key is pressed. Any ideas on how I can achieve this? I browsed online and apparently getch and raw_input is something I can do but I don't exactly know how that works.

    if user_input != "-":
        play_Key_Audio(user_input)
    
    else:
        print("The code has ended, GoodBye!!!")
        keep_running = False
        

You can see the code above. I wanna get the user input without them needing to press enter. I am using Jupyter Notebook.