title: How to uncheck a checked radio buttons in pyqt4
body: <p>Im making a quiz and after my next button is pressed i want the the radio buttons to be unchecked but this isnt happening. Here is where i put the radio buttons.  </p>
  
  <pre><code>self.answers = QtGui.QButtonGroup(self) 
  self.Correctanswer = QRadioButton()
  self.Incorrectans1 = QRadioButton()
  self.Incorrectans2 = QRadioButton()
  self.Incorrectans3 = QRadioButton()
  self.answers.addButton(self.Correctanswer)
  self.answers.addButton(self.Incorrectans1)
  self.answers.addButton(self.Incorrectans2)
  self.answers.addButton(self.Incorrectans3)
  self.answers.buttonClicked.connect(self.QuestionCheck)
  self.Correctanswer.setAutoExclusive(True)
  self.Incorrectans1.setAutoExclusive(True)
  self.Incorrectans2.setAutoExclusive(True)
  self.Incorrectans3.setAutoExclusive(True)
  </code></pre>
  
  <p>Here the subroutine which is connected to my next button. And here i try to set the radio buttons to be clear but that isnt happening. The radio button still has its previous choice from the last question.</p>
  
  <pre><code>def Showquestions2(self):
      self.Questionum.setText("Question 2")
      self.Correctanswer.setChecked(False)
      self.Incorrectans1.setChecked(False)
      self.Incorrectans2.setChecked(False)
      self.Incorrectans3.setChecked(False)
      self.ismultichoiceButton.clicked.connect(self.Showquestions3)
  </code></pre>
  
  <p>Could anyone tell me where im going wrong? thanks</p>