In python the equivalent to switch case in other languages is match:

    current_mode = 2
    match (current_mode):
        case 1:
            print("Do something A")
        case 2:
            print("Do something B")
        case 3:
            print("Do something C")
        case _:
            print("Unknown")

break

There is no break in Python for match. break is only used for loops.

If you want to achieve being able to break from a match case early you can use an exception trick like this:

    current_mode = 2
    try:
        match (current_mode):
            case 1:
                print("Do something A")
            case 2:
                print("Do something B1")
                raise GeneratorExit("")    #We can use a specific error type like 'GeneratorExit' so we can trap it seperatly from actual errors we may want to handle
                print("Do something B2")
            case 3:
                print("Do something C")
            case _:
                print("Unknown")
    except GeneratorExit:
        #match break equivalent exit point (use raise GeneratorExit("") )
        pass    #placeholder code needed for the except

    print("We're out of the match")