title: PyQt5 a dash in checkbox not a ✓when I setCheckState(True)
body: <p><a href="https://i.stack.imgur.com/emQOl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/emQOl.png" alt="enter image description here"></a>
  As The pic shows, a dash line in checkbox not a tick. And I have to click to make it a tick, how can I fix it?</p>
  
  <pre><code>...
  group_list = QListWidget(self)
  for i in range(2):
      group = QListWidgetItem(str(i))
      group.setCheckState(1)
      group_list.addItem(group)       
  ...
  </code></pre>
  
  <p>ps: PyQt5.9.2</p>