title: How to change icon in title QMessageBox in Qt, python
body: <p>How to change or delete icon in title QMessageBox in Qt, python. I have next cod:</p>
  
  <pre><code>msgBox = QtGui.QMessageBox(QtGui.QMessageBox.Information, ' ', 'Completed',
                             buttons=QtGui.QMessageBox.Yes)
  msgBox.setWindowFlags(QtCore.Qt.FramelessWindowHint |
                        QtCore.Qt.WindowTitleHint)
  msgBox.exec_()
  </code></pre>
  
  <p>When msgBox appear in monitor, no icon and text in title, but on task bar I see the standart icon Windows. it's not beautiful.</p>