How to use the xhtml2pdf.util.memoized function in xhtml2pdf

@memoized
def getPos(position, pagesize):
    """
    Pair of coordinates
    """
    position = str(position).split()
    if len(position) != 2:
        raise Exception("position not defined right way")
    x, y = [getSize(pos) for pos in position]
    return getCoords(x, y, None, None, pagesize)

@memoized
def getBox(box, pagesize):
    """
    Parse sizes by corners in the form:
       
    The last to values with negative values are interpreted as offsets form
    the right and lower border.
    """
    box = str(box).split()
    if len(box) != 4:
        raise Exception("box not defined right way")
    x, y, w, h = [getSize(pos) for pos in box]
    return getCoords(x, y, w, h, pagesize)

@memoized
def getBox(box, pagesize):
    """
    Parse sizes by corners in the form:
       
    The last to values with negative values are interpreted as offsets form
    the right and lower border.
    """
    box = str(box).split()
    if len(box) != 4:
        raise Exception("box not defined right way")
    x, y, w, h = [getSize(pos) for pos in box]
    return getCoords(x, y, w, h, pagesize)

@memoized
def getCoords(x, y, w, h, pagesize):
    """
    As a stupid programmer I like to use the upper left
    corner of the document as the 0,0 coords therefore
    we need to do some fancy calculations
    """
    #~ print pagesize
    ax, ay = pagesize
    if x < 0:
        x = ax + x
    if y < 0:
        y = ay + y
    if w is not None and h is not None:
        if w <= 0:
            w = (ax - x + w)
        if h <= 0:

@memoized
def getSize(value, relative=0, base=None, default=0.0):
    """
    Converts strings to standard sizes.
    That is the function taking a string of CSS size ('12pt', '1cm' and so on)
    and converts it into a float in a standard unit (in our case, points).

    >>> getSize('12pt')
    12.0
    >>> getSize('1cm')
    28.346456692913385
    """
    try:
        original = value
        if value is None:
            return relative
        elif type(value) is float:

@memoized
def getColor(value, default=None):
    """
    Convert to color value.
    This returns a Color object instance from a text bit.
    """

    if isinstance(value, Color):
        return value
    value = str(value).strip().lower()
    if value == "transparent" or value == "none":
        return default
    if value in COLOR_BY_NAME:
        return COLOR_BY_NAME[value]
    if value.startswith("#") and len(value) == 4:
        value = "#" + value[1] + value[1] + \
            value[2] + value[2] + value[3] + value[3]

@memoized
def getSize(value, relative=0, base=None, default=0.0):
    """
    Converts strings to standard sizes.
    That is the function taking a string of CSS size ('12pt', '1cm' and so on)
    and converts it into a float in a standard unit (in our case, points).

    >>> getSize('12pt')
    12.0
    >>> getSize('1cm')
    28.346456692913385
    """
    try:
        original = value
        if value is None:
            return relative
        elif type(value) is float:

@memoized
def getCoords(x, y, w, h, pagesize):
    """
    As a stupid programmer I like to use the upper left
    corner of the document as the 0,0 coords therefore
    we need to do some fancy calculations
    """
    #~ print pagesize
    ax, ay = pagesize
    if x < 0:
        x = ax + x
    if y < 0:
        y = ay + y
    if w is not None and h is not None:
        if w <= 0:
            w = (ax - x + w)
        if h <= 0: