title: Python GUI program in wxPython won't run
body: <p>I have the following code, and I am following a tutorial:</p>
  
  <p>(<a href="http://zetcode.com/wxpython/layout/" rel="nofollow">http://zetcode.com/wxpython/layout/</a> - GoToClass part)</p>
  
  <p>I can't figure out what is wrong with it ... :/</p>
  
  <p>As you can see in the tutorial, it is supposed to produce this:</p>
  
  <p><a href="https://i.stack.imgur.com/JbT3I.png" rel="nofollow"><img src="https://i.stack.imgur.com/JbT3I.png" alt="enter image description here"></a></p>
  
  <p>The code:</p>
  
  <pre><code>#!/usr/bin/python
  # -*- coding: utf-8 -*-
  
  # gotoclass.py
  
  import wx
  
  class Example(wx.Frame):
  
      def __init__(self, parent, title):
          super(Example, self).__init__(parent, title=title, 
              size=(390, 350))
  
          self.InitUI()
          self.Centre()
          self.Show()     
  
      def InitUI(self):
  
          panel = wx.Panel(self)
  
          font = wx.SystemSettings_GetFont(wx.SYS_SYSTEM_FONT)
          font.SetPointSize(9)
  
          vbox = wx.BoxSizer(wx.VERTICAL)
  
          hbox1 = wx.BoxSizer(wx.HORIZONTAL)
          st1 = wx.StaticText(panel, label='Class Name')
          st1.SetFont(font)
          hbox1.Add(st1, flag=wx.RIGHT, border=8)
          tc = wx.TextCtrl(panel)
          hbox1.Add(tc, proportion=1)
          vbox.Add(hbox1, flag=wx.EXPAND|wx.LEFT|wx.RIGHT|wx.TOP, border=10)
  
          vbox.Add((-1, 10))
  
          hbox2 = wx.BoxSizer(wx.HORIZONTAL)
          st2 = wx.StaticText(panel, label='Matching Classes')
          st2.SetFont(font)
          hbox2.Add(st2)
          vbox.Add(hbox2, flag=wx.LEFT | wx.TOP, border=10)
  
          vbox.Add((-1, 10))
  
          hbox3 = wx.BoxSizer(wx.HORIZONTAL)
          tc2 = wx.TextCtrl(panel, style=wx.TE_MULTILINE)
          hbox3.Add(tc2, proportion=1, flag=wx.EXPAND)
          vbox.Add(hbox3, proportion=1, flag=wx.LEFT|wx.RIGHT|wx.EXPAND, 
              border=10)
  
          vbox.Add((-1, 25))
  
          hbox4 = wx.BoxSizer(wx.HORIZONTAL)
          cb1 = wx.CheckBox(panel, label='Case Sensitive')
          cb1.SetFont(font)
          hbox4.Add(cb1)
          cb2 = wx.CheckBox(panel, label='Nested Classes')
          cb2.SetFont(font)
          hbox4.Add(cb2, flag=wx.LEFT, border=10)
          cb3 = wx.CheckBox(panel, label='Non-Project classes')
          cb3.SetFont(font)
          hbox4.Add(cb3, flag=wx.LEFT, border=10)
          vbox.Add(hbox4, flag=wx.LEFT, border=10)
  
          vbox.Add((-1, 25))
  
          hbox5 = wx.BoxSizer(wx.HORIZONTAL)
          btn1 = wx.Button(panel, label='Ok', size=(70, 30))
          hbox5.Add(btn1)
          btn2 = wx.Button(panel, label='Close', size=(70, 30))
          hbox5.Add(btn2, flag=wx.LEFT|wx.BOTTOM, border=5)
          vbox.Add(hbox5, flag=wx.ALIGN_RIGHT|wx.RIGHT, border=10)
  
          panel.SetSizer(vbox)
  
  
  if __name__ == '__main__':
  
      app = wx.App()
      Example(None, title='Go To Class')
      app.MainLoop()
  </code></pre>
  
  <p>The following are the errors I'm getting: (Removed the path to the file</p>
  
  <pre><code>Traceback (most recent call last):
    File "[path]", line 78, in &lt;module&gt;
      Example(None, title='Go To Class')
    File "[path]", line 14, in __init__
      self.InitUI()
    File "[path]", line 21, in InitUI
      font = wx.SystemSettings_GetFont(wx.SYS_SYSTEM_FONT)
  AttributeError: 'module' object has no attribute 'SystemSettings_GetFont'
  </code></pre>