code: def on_guess(self, event):
      sample = self.test_text_ctl.GetValue()
      for guess in self.guesses:
          m = re.match(guess, sample)
          if m is not None:
              self.regexp_display.Text = guess
              break
      else:
          wx.MessageBox(
              "None of the standard regular expressions matches the test text.",
              caption="No matching guesses",
              style=wx.OK | wx.CENTRE | wx.ICON_INFORMATION,
              parent=self,
          )
  
imports: import re
  import wx
  import wx.stc
label_desc: Use image node_id 4 for calling the RegexpDialog obj's underlying member method code with example usage: obj.on_guess(event) without return types