# -*- coding: utf-8 -*-

# python:2.x

__author__ = ‘Administrator‘

from decimal import *

from PyQt4.QtGui import *

from PyQt4.Qt import *

from PyQt4.QtCore import *

from pngs import Ui_Dialog

import sys

class Example(QTableWidget,Ui_Dialog):

    def __init__(self,args=None):

        super(Example, self).__init__(args)

        self.setupUi(self)

        self.pushButton_2.clicked.connect(self.png1)

        self.pushButton.clicked.connect(self.png2)

        self.png1()

    def png2(self):

        path=QPixmap(r‘i/b.png‘)

        self.png.setPixmap(path)

        self.png.resize(path.width(),path.height())

    def png1(self):

        path=QPixmap(r‘i/a.png‘)

        self.png.setPixmap(path)

        self.png.resize(path.width(),path.height())

app =QApplication(sys.argv)

#QApplication.setQuitOnLastWindowClosed(False)退出在最后窗口关闭点击

x = Example()

x.show()

sys.exit(app.exec_())