def f():
    try: return 0
    except: return 1,2

x = f() # x is 0
x,y = f() # proposal: x,y should be 1,2 instead of uncaught TypeError

It would make sense to be able to catch [TypeError: 'int' object is not iterable] and return the correct number of values. Yes, the way it's done now, the function is no longer running when it is caught - but is it possible and practical to determine if parameters match before the function returns instead of afterward, allowing the called function to catch the error attempting to return?