<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def find_multiplicity(knot, knot_vector, **kwargs):
 """ Finds knot multiplicity over the knot vector. Keyword Arguments: * ``tol``: tolerance (delta) value for equality checking :param knot: knot or parameter, :math:`u` :type knot: float :param knot_vector: knot vector, :math:`U` :type knot_vector: list, tuple :return: knot multiplicity, :math:`s` :rtype: int """

    # Get tolerance value
    tol = kwargs.get('tol', 10e-8)

    mult = 0  # initial multiplicity

    for kv in knot_vector:
        if abs(knot - kv) <= tol:
            mult += 1

    return mult