title: Disable and enable radiobuttons from another radiobutton in PyQt4 Python
body: <p>I have 3 radiobutton groups in forms of Yes or No. I want to disable the last 2 radiobutton groups if the first radiobutton is "No" and enable them when the first radiobutton is "Yes". I can make the enabled or disabled by default but toggling Yes/No from the first group doesn't change the result in the second and third group.</p>
  
  <p>Here is a summary of my code:</p>
  
  <pre><code>self.yes_radioButtonGroup1 = QtGui.QRadioButton(self.centralwidget)      
  self.yes_radioButtonGroup1.setObjectName(_fromUtf8("yes_radioButtonGroup1"))
  self.no_radioButtonGroup1 = QtGui.QRadioButton(self.centralwidget)
  self.no_radioButtonGroup1.setObjectName(_fromUtf8("no_radioButtonGroup1"))
  self.radioButtonGroup1= QtGui.QButtonGroup(MainWindow)   
  self.radioButtonGroup1.setObjectName(_fromUtf8("radioButtonGroup1"))
  self.radioButtonGroup1.addButton(self.yes_radioButtonGroup1)
  self.radioButtonGroup1.addButton(self.no_radioButtonGroup1)
  
  self.yes_radioButtonGroup2 = QtGui.QRadioButton(self.centralwidget)      
  self.yes_radioButtonGroup2.setObjectName(_fromUtf8("yes_radioButtonGroup2"))
  self.no_radioButtonGroup2 = QtGui.QRadioButton(self.centralwidget)
  self.no_radioButtonGroup2.setObjectName(_fromUtf8("no_radioButtonGroup2"))
  self.radioButtonGroup2= QtGui.QButtonGroup(MainWindow)   
  self.radioButtonGroup2.setObjectName(_fromUtf8("radioButtonGroup2"))
  self.radioButtonGroup2.addButton(self.yes_radioButtonGroup1)
  self.radioButtonGroup2.addButton(self.no_radioButtonGroup1)
  
  self.yes_radioButtonGroup3 = QtGui.QRadioButton(self.centralwidget)      
  self.yes_radioButtonGroup3.setObjectName(_fromUtf8("yes_radioButtonGroup3"))
  self.no_radioButtonGroup3 = QtGui.QRadioButton(self.centralwidget)
  self.no_radioButtonGroup3.setObjectName(_fromUtf8("no_radioButtonGroup3"))
  self.radioButtonGroup3= QtGui.QButtonGroup(MainWindow)   
  self.radioButtonGroup3.setObjectName(_fromUtf8("radioButtonGroup3"))
  self.radioButtonGroup3.addButton(self.yes_radioButtonGroup3)
  self.radioButtonGroup3.addButton(self.no_radioButtonGroup3)
  
  
  if self.yes_radioButtonGroup1.isChecked() == True:
          self.yes_radioButtonGroup2.setEnabled(True)
          self.no_radioButtonGroup2.setEnabled(True)
          self.yes_radioButtonGroup3.setEnabled(True)
          self.no_radioButtonGroup3.setEnabled(True)
  
  elif self.no_radioButtonGroup1.isChecked() == True:
          self.yes_radioButtonGroup2.setEnabled(False)
          self.no_radioButtonGroup2.setEnabled(False)
          self.yes_radioButtonGroup3.setEnabled(False)
          self.no_radioButtonGroup3.setEnabled(False)
  </code></pre>
  
  <p>I was wondering if anybody knows how to dynamically enable or disable the last two radiobutton group when values from the first radiobutton changes?</p>