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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 get_pixel_size_from_nside(nside):
 """ Returns an estimate of the pixel size from the HEALPix nside coordinate This just uses a lookup table to provide a nice round number for each HEALPix order. """

    order = int(np.log2(nside))
    if order < 0 or order > 13:
        raise ValueError('HEALPix order must be between 0 to 13 %i' % order)

    return HPX_ORDER_TO_PIXSIZE[order]