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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def heightmap_get_interpolated_value( hm: np.ndarray, x: float, y: float ) -> float: """Return the interpolated height at non integer coordinates. Args: hm (numpy.ndarray):
 A numpy.ndarray formatted for heightmap functions. x (float):
 A floating point x coordinate. y (float):
 A floating point y coordinate. Returns: float: The value at ``x``, ``y``. """

    return float(
        lib.TCOD_heightmap_get_interpolated_value(_heightmap_cdata(hm), x, y)
    )