title: PyQt: How to set ComboBox current item Wihtout knowing Item's Index Number
body: <p>Created <strong>myComboBox</strong> with:</p>
  
  <pre><code>myComboBox = QtGui.QComboBox()
  </code></pre>
  
  <p>Populated it with three items:</p>
  
  <p>myItemsList = ['item01', 'item02', 'item03']</p>
  
  <pre><code>for item in myItemsList:
      myComboBox.addItem(item)
  </code></pre>
  
  <p>Now I want to set a comboBox to a second item knowing only string value of the item: <strong><em>'item02'</em></strong>.</p>
  
  <p>Let's assume I can't index myItemsList to find out what indexed position of an item with a value <strong><em>'item02'</em></strong>. </p>
  
  <p>I want to set a myComboBox without using an item index number but its string value. Thanks in advance!</p>