def _uniqueColumns(self):
    '\n        raise exception if column names (cnames) are not unique\n        '
    if (len(set(self.table[0])) != len(self.table[0])):
        raise Exception('Column names not unique')
raise exception if column names (cnames) are not unique
def _uniqueColumns(self):
    '\n        \n        '
    if (len(set(self.table[0])) != len(self.table[0])):
        raise Exception('Column names not unique')