ref: 5bcb3f4e54ecefdf2c75ec46c4076e157ff8c384
dir: /sys/src/cmd/python/Doc/lib/sqlite3/collation_reverse.py/
import sqlite3
def collate_reverse(string1, string2):
return -cmp(string1, string2)
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()