code: def call(self):
          '''show a value dialog'''
          from MAVProxy.modules.lib.wx_loader import wx
          try:
              dlg = wx.TextEntryDialog(None, self.title, self.title, defaultValue=str(self.default))
          except TypeError:
              dlg = wx.TextEntryDialog(None, self.title, self.title, value=str(self.default))
          if dlg.ShowModal() != wx.ID_OK:
              return None
          return dlg.GetValue(f call(self):
          '''show a value dialog'''
          from MAVProxy.modules.lib.wx_loader import wx
          try:
              dlg = wx.TextEntryDialog(None, self.title, self.title, defaultValue=str(self.default))
          except TypeError:
              dlg = wx.TextEntryDialog(None, self.title, self.title, value=str(self.default))
          if dlg.ShowModal() != wx.ID_OK:
              return None
          return dlg.GetValue()
docs: show a value dialog