I am new to Python and trying to use Cell and its method
here is the code
def draw_Cell(self, lower, upper, node1, branch_name):
c = Cell(lower, upper-lower, upper - lower,
edgecolor='k', text = branch_name,
facecolor= self.color_method(node1), loc = None)
My question is how do I use the method 'auto_set_font_size()' to shrink font
size to fit the text.