@craigmrock Shift left the two def str and scale_steps, they are inside init

legal_mode = [ "Ionian", "Dorian", "Phrygian", "Lydian", "Mixolydian", "Aeolian", "Locrian"] stepping = [2, 2, 1, 2, 2, 2, 1] major_mode = ["Ionian"] class Mode(): def __init__(self,title): self.title = title self.ismajor = title in major_mode tonic = legal_mode.index(title) self.stepping = stepping[tonic:]+stepping[:tonic] def __str__(self): return "Title: {}, Major{}".format(self.title, self.ismajor) def scale_steps(self): return "Half-steps{}".format(''.join(str(c) for c in self.stepping)) mode1 = Mode("Ionian") print(mode1) print(mode1.scale_steps()) mode2 = Mode("Dorian") print(mode2) print(mode2.scale_steps())

At the start of your program, load both pyuis.

gridview=ui.load_pyui('AlphaGrid.pyui') numview=ui.load_pyui('NumberSelector.pyui') [.....]

then, when you want to show your numview, you can display it in a popover (which makes dismissing easy, but might be dodgy with a tableview)

if you are using ipad, you could also simply present both as panels, which allow you to simply switch tabs to alternate, no button needed.

Or, for iphone, having your root view be a navigationview, then you would push_view the num selection view.

Or, you can add this as a subview of a common "root view" -- though in that case I recommend adding both your gridview and num view to a single root view, then controlling visibility using hidden and/or bring_to_front