Hello, I want to keep last.fm's user recent music tracks list to postgresql database table using pylast interface.But when I tried to insert values to the table it shows errors.Code example:

for i, artist in enumerate(recent_tracks):
    for key in sorted(artist):

        cur.execute("""
        INSERT INTO u_recent_track(Playback_date,Time_stamp,Track) 
        VALUES (%s,%s)""",  (key, artist[key]))


    conn.commit()
cur.execute("SELECT * FROM u_recent_track;")
cur.fetchone()
for row in cur:
    print '   '.join(row[1:])

cur.close()
conn.close()

Here "recent_tracks" tuple have the values for example:

artist 0
  - playback_date : 5 May 2010, 11:14
  - timestamp : 1273058099
  - track         : Brian Eno - Web

I want to store these value under u_recent_track(Tid,Playback_date,Time_stamp,Track).Can anybody have idea how to sort out this problem? when I tried to run, it shows error:

Traceback (most recent call last):
  File "F:\JavaWorkspace\Test\src\recent_track_database.py", line 50, in <module>
    VALUES (%s,%s,%s)""",  (key, artist[key]))
IndexError: tuple index out of range

Thanks in advanced!