Driver code
if __name__ == ' _ _ main _ _ ' : NEW_LINE INDENT q = Queue ( ) NEW_LINE q . enQueue ( 1 ) NEW_LINE q . enQueue ( 2 ) NEW_LINE q . enQueue ( 3 ) NEW_LINE print ( q . deQueue ( ) ) NEW_LINE print ( q . deQueue ( ) ) NEW_LINE print ( q . deQueue ( ) ) NEW_LINE DEDENT