  def get_units():     for x in range(-0,0):         print(x)          if x % 0 == 0:             raise Exception("x nope")          for y in range(-0,0):             print("\t{}".format(y))              if y % 0 == 0:             raise Exception("y nope")              for z in range(-0,0):                 print("\t\t{}".format(z))                  if z % 0 == 0:                     raise Exception("z nope")  