def main(): tab = Tab() history = History() tab.setUrl("http://tutorialspoint.com") history.add(tab.saveUrl()) tab.setUrl("https://www.python.org/doc/") history.add(tab.saveUrl()) tab.setUrl("http://www.trome.com.pe") print("Current web url: " + tab.getUrl()) print("Back button is clicked.. ") tab.restoreFromSavedUrl(history.get(1)) print("Saved url: " + tab.getUrl()) print("Back button again.. ") tab.restoreFromSavedUrl(history.get(0)) print("Saved url: " + tab.getUrl())