title: not all arguments converted during string formatting
body: <p><code>thumbnail</code> and <code>image</code> are BLOB field, <code>num1</code> and <code>num2</code> are Integer field, others are Str.</p>
  
  <p>I want to insert binary data into MYSQL. But When this line called, error occured.</p>
  
  <pre><code>cursor.execute("INSERT INTO image(num1, num2, filename, ext, thumbnail, image) VALUES(?, ?, ?, ?, ?, ?);" , (num1, num2, _name, _ext, _thumb, _image))
  </code></pre>
  
  <p>Error text: not all arguments converted during string formatting</p>
  
  <p>How to fix it? Please teach me.</p>