def sine(w, A=1, phi=0, offset=0):
    ''' Return a driver function that can advance a sequence of sine values.

    .. code-block:: none

        value = A * sin(w*i + phi) + offset

    Args:
        w (float) : a frequency for the sine driver
        A (float) : an amplitude for the sine driver
        phi (float) : a phase offset to start the sine driver with
        offset (float) : a global offset to add to the driver values

    '''
    from math import sin
    def f(i):
        return A * sin(w*i + phi) + offset
    return partial(force, sequence=_advance(f))
Return a driver function that can advance a sequence of sine values.

    .. code-block:: none

        value = A * sin(w*i + phi) + offset

    Args:
        w (float) : a frequency for the sine driver
        A (float) : an amplitude for the sine driver
        phi (float) : a phase offset to start the sine driver with
        offset (float) : a global offset to add to the driver values