How to use the photutils.RectangularAperture function in photutils

def square_aperture(pos, l, w, t):
            return RectangularAperture(pos, l, w, t)

def aperture(r, pos):
            """ Creates circular & rectangular apertures of given size """
            circ = CircularAperture(pos, r)
            rect = RectangularAperture(pos, r, r, 0.0)
            return circ, rect

def aperture(r, pos):
            """ Creates circular & rectangular apertures of given size """
            circ = CircularAperture(pos, r)
            rect = RectangularAperture(pos, r, r, 0.0)
            return circ, rect

def rectangle(pos, l, w, t):
    return RectangularAperture(pos, l, w, t)

def create_ap(pos):
            """ Defines the custom aperture, as inputted by the user """
            nonlocal shape, r, l, w, t
            if shape=='circle':
                return CircularAperture(pos, r)
            elif shape=='rectangle':
                return RectangularAperture(pos, l, w, t)
            else:
                print("Shape of aperture not recognized. Please input: circle or rectangle")
            return

def aperture(r, pos):
    circ = CircularAperture(pos, r)
    rect = RectangularAperture(pos, r, r, 0.0)
    return circ, rect