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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 clear_cached(self):
 """ Remove cached results from this table's computed columns. """

        _TABLE_CACHE.pop(self.name, None)
        for col in _columns_for_table(self.name).values():
            col.clear_cached()
        logger.debug('cleared cached columns for table {!r}'.format(self.name))