title: NameError: name 'QtGui' is not defined
body: <p>When i try to run this code, it's showing an error: <code>NameError: name 'QtGui' is not defined</code>. What's wrong with my app?</p>
  
  <p>Code:</p>
  
  <pre><code>import sys
  from tkinter import *
  from PyQt4 import *
  from PyQt4.QtGui import *
  from PyQt4.QtCore import * 
  
  class WindowHello(QtGui, QWidget, QtCore):
      def __init__(self, parent = None):
          QtGui.QWidget.__init__(self, parent)
  
          self.setGeometry(650, 450, 450, 380)
          self.label = QtGui.QLabel("&lt;center&gt;Hello!&lt;center&gt;")
          self.box = QtGui.QVBoxLayout()
          self.box.addWidget(self.label)
          self.setLayout(self.box)
  
  app = QtGui.QApplication(sys.argv)
  
  op = WindowHello()
  op.setWindowTitle('LangTIME')
  op.setWindowIcon(QtGui.QIcon('Minilogowin.png'))
  op.show()
  
  sys.exit(app.exec_())
  </code></pre>
  
  <p>I'm did it all like in the example, but still it is showing error.</p>