title: MySQLConverter' object has no attribute '_tuple_to_mysql' exception with mysql-connector
body: <p>I have 8 kinds of data that I would like to insert into a mysql table through mysql-connector using python.
  I have looked at some documents saying that it is better to use <strong><em>int, string, or tuple</em></strong> when using mysql-connector. 
  I have tried to adjust some data types into either string or tuple, but the IDE keeps showing error....
  If anyone please help me clarify which data type I shall use.</p>
  
  <p>The data structure is set as follows(if anything is better to be changed please kindly let me know):</p>
  
  <pre><code>+----------+---------------+------+-----+---------+-------+
  | Field    | Type          | Null | Key | Default | Extra |
  +----------+---------------+------+-----+---------+-------+
  | URL      | varchar(1023) | YES  |     | NULL    |       |
  | Title    | varchar(1023) | YES  |     | NULL    |       |
  | Content  | varchar(1023) | YES  |     | NULL    |       |
  | Month    | varchar(1023) | YES  |     | NULL    |       |
  | Date     | varchar(1023) | YES  |     | NULL    |       |
  | Year     | varchar(1023) | YES  |     | NULL    |       |
  | Time     | varchar(1023) | YES  |     | NULL    |       |
  | TimeZone | varchar(1023) | YES  |     | NULL    |       |
  +----------+---------------+------+-----+---------+-------+
  </code></pre>
  
  <hr>
  
  <p>My codes are as follows:</p>
  
  <pre><code>for i in range(len(URL)):
      dbcur.execute(
          """INSERT INTO scripting (URL, Title, Content, Month, Date, Year, Time, TimeZone)
             VALUES ("%s", "%s", "%s", "%s", "%s", "%s", "%s", "%s")""",
             ((URL[i],), (Title[i],), (Content[i],), (Month[i],), (Date[i],), (Year[i],), 
             (Time1[i],), (TimeZone[i],)))
      dbcon.commit()
  </code></pre>
  
  <p>ps- URL[], Title[], Content[]... TimeZone[] are lists of data, and their ranges are the same.</p>
  
  <ul>
  <li><p>URL: url. 
  I set this with tuple and it is fine.(can be successfully stored)</p></li>
  <li><p>Title: A title of an essay.(i.e. an sentence) 
  I have tried to either set it as tuple with <code>(Title[i],)</code> or a string with <code>StringIO.String(Title[i])</code>, but the error are </p>
  
  <pre><code>MySQLConverter' object has no attribute '_tuple_to_mysql  
  AttributeError: 'module' object has no attribute 'String'
  </code></pre>
  
  <p>separately.</p></li>
  <li><p>Content: several sentences.
  faced same problems as above</p></li>
  <li><p>Month, Date, Year, Time, TimeZone:
  have not tried yet, but I guess I can import these data with tuple type?</p></li>
  </ul>
  
  <p>I have looked over stackoverflow and tried several data types but it still doesn't work out here. How do I deal with these data may someone kindly let me know?</p>