code: def AddClientKeywords(self, client_id, keywords, cursor=None):
      
      cid = db_utils.ClientIDToInt(client_id)
      keywords = set(keywords)
      args = [(cid, mysql_utils.Hash(kw), kw) for kw in keywords]
      args = list(collection.Flatten(args))
  
      query = """
          INSERT INTO client_keywords (client_id, keyword_hash, keyword)
          VALUES {}
          ON DUPLICATE KEY UPDATE timestamp = NOW(6)
              """.format(", ".join(["(%s, %s, %s)"] * len(keywords)))
      try:
        cursor.execute(query, args)
      except MySQLdb.IntegrityError as e:
        raise db.UnknownClientError(client_id, cause=e)
docs: Associates the provided keywords with the client.