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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 create_ngram_table(self, cardinality):
 """ Creates a table for n-gram of a give cardinality. The table name is constructed from this parameter, for example for cardinality `2` there will be a table `_2_gram` created. Parameters cardinality : int The cardinality to create a table for. """

        query = "CREATE TABLE IF NOT EXISTS _{0}_gram (".format(cardinality)
        unique = ""
        for i in reversed(range(cardinality)):
            if i != 0:
                unique += "word_{0}, ".format(i)
                query += "word_{0} TEXT, ".format(i)
            else:
                unique += "word"
                query += "word TEXT, count INTEGER, UNIQUE({0}) );".format(
                    unique)

        self.execute_sql(query)