@classmethod
def _get_block_manager_axis(cls, axis):
    'Map the axis to the block_manager axis.'
    axis = cls._get_axis_number(axis)
    if cls._AXIS_REVERSED:
        m = (cls._AXIS_LEN - 1)
        return (m - axis)
    return axis
Map the axis to the block_manager axis.
@classmethod
def _get_block_manager_axis(cls, axis):
    
    axis = cls._get_axis_number(axis)
    if cls._AXIS_REVERSED:
        m = (cls._AXIS_LEN - 1)
        return (m - axis)
    return axis