title: how to download files using pyqt5 webenginewidgets
body: <p>I am learning pyqt5 and built a simple webbrowser in pyqt5 webengine .
  Now out of curiosity I want to know that is there a method by which I am able to download files using this minimalistic browser,Thanks in advance.</p>
  
  <pre><code>import sys
  from PyQt5 import QtWidgets,QtGui,QtCore
  from PyQt5.QtWebEngineWidgets import *
  app=QtWidgets.QApplication(sys.argv)
  w=QWebEngineView()
  w.page().fullScreenRequested.connect(QWebEngineFullScreenRequest.accept)
  w.load(QtCore.QUrl('https://google.com'))
  w.showMaximized()
  app.exec_()
  </code></pre>