How to use the pdfplumber.utils.decimalize function in pdfplumber

def move_to_avg(objs, orientation):
    """
    Move `objs` vertically/horizontally to their average x/y position.
    """
    if orientation not in ("h", "v"):
        raise ValueError("Orientation must be 'v' or 'h'")
    if len(objs) == 0: return []
    move_axis = "v" if orientation == "h" else "h"
    attr = "top" if orientation == "h" else "x0"
    values = list(map(itemgetter(attr), objs))
    q = pow(10, utils.decimalize(values[0]).as_tuple().exponent)
    avg = utils.decimalize(float(sum(values) / len(values)), q)
    new_objs = [ utils.move_object(obj, move_axis, avg - obj[attr])
        for obj in objs ]
    return new_objs

def decimalize(self, x):
        return utils.decimalize(x, self.pdf.precision)

def move_to_avg(objs, orientation):
    """
    Move `objs` vertically/horizontally to their average x/y position.
    """
    if orientation not in ("h", "v"):
        raise ValueError("Orientation must be 'v' or 'h'")
    if len(objs) == 0: return []
    move_axis = "v" if orientation == "h" else "h"
    attr = "top" if orientation == "h" else "x0"
    values = list(map(itemgetter(attr), objs))
    q = pow(10, utils.decimalize(values[0]).as_tuple().exponent)
    avg = utils.decimalize(float(sum(values) / len(values)), q)
    new_objs = [ utils.move_object(obj, move_axis, avg - obj[attr])
        for obj in objs ]
    return new_objs