title: PyQt5 QWebEngineView not working properly
body: <p>This code doesn't show anything on execution. Not even the main window.
  How can I use QWebEngineView() in order to make a useful code.</p>
  
  <pre><code>from PyQt5.QtCore import *
  from PyQt5.QtGui import *
  from PyQt5.QtWidgets import *
  from PyQt5.QtWebEngineWidgets import *
  import sys
  
  class MainWindow(QMainWindow):
  
      def __init__(self, *args, **kwargs):
  
          super(MainWindow, self).__init__(*args, **kwargs)
  
          self.setWindowTitle('Browser Lite')
          self.setGeometry(5, 30, 1355, 730)
  
  
          self.browser = QWebEngineView()
          self.browser.load(QUrl('http://www.google.com'))
  
          self.setCentralWidget(self.browser)
  
  app = QApplication(sys.argv)
  win = MainWindow()
  win.show()
  app.exec_()
  </code></pre>