请教wxPython4.0中还有没有SplashScreen这个属性？调用一直出错

环境：Anaconda3 Python3.6 wxPython4.0
问题：在尝试为程序添加启动图片时，网上找到了一段代码如下：

import wx
class PaintApp(wx.App):
    def OnInit(self):
            bmp = wx.Image("wxPython.JPG")
            wx.SplashScreen(bmp,wx.SPLASH_CENTER_ON_SCREEN | wx.SPLASH_TIMEOUT,1000,None,-1)
            wx.Yield()
            frame = PaintFrame(None)
            frame.Show(True)
            self.SetTopWindow(frame)
            return True
if __name__ == '__main__':
            app = PaintApp()
            app.MainLoop()

没有其他错误，只提示“AttributeError: module 'wx' has no attribute 'SplashScreen'”。
运行普通窗体程序都没有问题，只有在用到wx.SplashScreen()时才报错，网上找了很久也几乎没有相似的错误，会不会是版本问题？

from wx import adv

adv.SplashScreen(bmp,adv.SPLASH_CENTER_ON_SCREEN | adv.SPLASH_TIMEOUT,1000,None,-1)

import wx
from wx import adv
class PaintApp(wx.App):
def OnInit(self):
bmp = wx.Image("wxPython.jpg").ConvertToBitmap()
adv.SplashScreen(bmp,adv.SPLASH_CENTER_ON_SCREEN | adv.SPLASH_TIMEOUT,1000,None,-1)
wx.Yield()
frame = PaintFrame(None)
frame.Show(True)
self.SetTopWindow(frame)
return True
if name == '__main__':
app = PaintApp()
app.MainLoop()