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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_table_schema(self, tname):
        ''' Returns a list of column names of the provided table name '''
        tname = self._check_tname(tname, noload=True)
        if tname not in self._schemas:
            raise ValueError('Table "%s" not found in schema store' % tname)
        return list(self._schemas[tname])