title: PyQt - Loading multiple UI files
body: <p>I have multiple ui files, each created in Qt Designer.  I have a function (main) that calls the first UI. There is a button on this first UI that calls the second UI and closes the first one.</p>
  
  <pre><code>from PyQt4 import QtGui,QtCore, uic
  
  uifile_1 = '/Users/Shared/Autodesk/maya/scripts/python/Intro_UI.ui'
  form_1, base_1 = uic.loadUiType(uifile_1)
  
  uifile_2 = '/Users/Shared/Autodesk/maya/scripts/python/objtemplate_tuner.ui'
  form_2, base_2 = uic.loadUiType(uifile_2)
  
  class CreateUI_2(base_2, form_2):
      def __init__(self):
          super(base_2,self).__init__()
          self.setupUi(self)
  
  class CreateUI_1(base_1, form_1):
      def __init__(self):
          super(base_1,self).__init__()
          self.setupUi(self)
          self.Establish_Connections()
  
      def Do_ButtonPress(self):        
          UI_2=CreateUI_2()
          UI_2.show()
          self.close()
      def Establish_Connections(self):
          QtCore.QObject.connect(self.noncharactermeshes_Button, QtCore.SIGNAL("clicked()"),self.Do_ButtonPress)      
  
  def main():       
      UI_1 = CreateUI_1()
      UI_1.show()
  
  main()
  </code></pre>
  
  <p>The problem is that when I run main() nothing happens.  Also note I'm creating this script for Maya and using PyQt4.</p>