def __init__(self, width, height, cols, rows):
		"""Create grid of buttons with the provided total width and height in
		pixels and subdivided into cols x rows equally sized buttons.
		"""
		self.col_size = cols / width
		self.row_size = height / rows
		self.buttons = []
dataset/ETHPy150Open adafruit/FreqShow/ui.py/ButtonGrid.__init__/swapped operands of `/`