I have a problem with understanding how lists, strings, tuples, number types and input arguments all interact with each other.
I have this program, in which I can use the *a structure to input unlimited arguments. As an example, if I use three arguments, it looks like this: def main(): #Play a chord pygame.mixer.pre_init(sample_rate, -16, 1) # 44.1kHz, 16-bit signed, mono pygame.init() play_for(waves(440,550,660), 5000) In that final line, I would like to be able to define the input arguments on a different line (I'm hoping to eventually make a Tkinter entry box), but when I try to do this: def main(): #Play a chord pygame.mixer.pre_init(sample_rate, -16, 1) # 44.1kHz, 16-bit signed, mono pygame.init() chord=[440,550,660] play_for(waves(chord), 5000) it doesn't work. It doesn't work with a string or a tuple either. The problem is that another part of the code needs to take float(chord[0]), that is convert the first input value into the float class, and the error message says "TypeError: float() argument must be a string or a number." This is fine when the elements of *chord are listed inside the function's parentheses, but it doesn't work if they're listed outside. Is there any way to list the input arguments without listing them inside the function's parentheses? Thanks. _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
