title: PyQT4: Adding combobox in Qtableview
body: <p>I am new to PyQT.</p>
  
  <p>I am interested to add a combobox to the each row of tableView. Is it possible in PyQT 4?</p>
  
  <p>I know, it is possible in QT5, but not sure about PyQT.</p>
  
  <p>Thank you in advance for help.</p>