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import sqlite3 def collate_reverse(string1, string2): if string1 == string2: return 0 elif string1 < string2: return 1 else: return -1 con = sqlite3.connect(":memory:") con.create_collation("reverse", collate_reverse) cur = con.cursor() cur.execute("create table test(x)") cur.executemany("insert into test(x) values (?)", [("a",), ("b",)]) cur.execute("select x from test order by x collate reverse") for row in cur: print(row) con.close()