ref: 8adc5a0fce7e50f8bf8e69e51274092a1a581cd6
dir: /sys/src/cmd/python/Doc/lib/sqlite3/adapter_datetime.py/
import sqlite3
import datetime, time
def adapt_datetime(ts):
    return time.mktime(ts.timetuple())
sqlite3.register_adapter(datetime.datetime, adapt_datetime)
con = sqlite3.connect(":memory:")
cur = con.cursor()
now = datetime.datetime.now()
cur.execute("select ?", (now,))
print cur.fetchone()[0]