Working with Images

[Victor Subervi]

Hi;
The python code works properly, so I assume this is a strictly MySQL
question now :)
If I grab an image in the database thus:

      sql = "select pic1 from products where id='" + str(id) + "';"
      cursor.execute(sql)
      pic1 = cursor.fetchall()[0][0].tostring()
#      pic1 = cursor.fetchall()[0][0]  // either this or the above line

and try and re-insert it thus:

      cursor.execute('update products set pic1="%s" where id="%s", ;',
(pic1, id))

it tells me I have an error in my MySQL syntax. What is the error?
TIA,
Victor