python - Wxpython doubling up underscore characters in Menu event.GetLabel() -

i load menu filenames user able choose from.
if file name contains underscore character (_),

event.geteventobject().getlabel(event.getid())

returns value underscore character (_) doubled up.
file name of a_file.txt becomes a__file.txt
can around problem using

event.geteventobject().menuitems[event.getid()].getlabel()

but not not know if there repercussions of using don't particularly want trawl through 1000's of lines of code hunting instances of strange issue.
have explanation behaviour , how avoid it?

the demonstration code below illustrates problem , work around.
tests normal file name, file name spaces , file name underscore.

import wx  class menuproblem(wx.frame):      def __init__(self, *args, **kwds):         self.frame=wx.frame.__init__(self, *args, **kwds)         self.menubar = wx.menubar() #        self.statusbar = wx.statusbar(self-1)         self.createstatusbar()         self.setstatustext("demonstration of wxpython")         menu1 = wx.menu()         menu_item_1 = menu1.append(wx.id_open, "&file")         menu_item_2 = menu1.append(wx.id_exit, "&exit...")      #build list of things via function or declaration         self.list_of_things = ["afilename.txt", "another filename.txt", "problem_filename.txt"]         list_used = wx.menu()         thing_count = 0          thing in self.list_of_things:             t1 = wx.menuitem(list_used, thing_count, thing)             list_used.appenditem(t1)             thing_count +=1          thing_end = wx.menuitem(list_used,199,'end of list')         list_used.appenditem(thing_end)          menu1.appendmenu(wx.id_file,'&problem demo',list_used)         menu1.sethelpstring(wx.id_file, 'click problem_filename.txt see doubling of underscore')          self.menubar.append(menu1, "&file")         self.setmenubar(self.menubar)     # create bindings thing list         i_count = 0         in self.list_of_things:             self.bind(wx.evt_menu, self.onthingopen, id=i_count)             i_count = i_count + 1         self.bind(wx.evt_menu, self.onthingend, id=199)         self.bind(wx.evt_menu, self.onclose, id=wx.id_exit)         self.show(true)      def onthingopen(self, event):         id_selected = event.getid()         obj = event.geteventobject()         print "option        :", id_selected         print "label returned:", obj.getlabel(id_selected)         print "now label in way"         print "label returned:", obj.menuitems[id_selected].getlabel()         print "from range:"         in range(obj.menuitemcount):             print "\t\t", obj.menuitems[i].getlabel()         print "."*50      def onthingend(self, event):         id_selected = event.getid()         obj = event.geteventobject()         print "option         :", id_selected         print "label returned :",obj.getlabel(id_selected)         print "enabled", obj.isenabled(id_selected)         print obj.menuitemcount         in range(obj.menuitemcount):             print obj.menuitems[i].getlabel()      def onclose(self, event):         self.close()  if __name__ == '__main__':     app = wx.app()     mc=menuproblem(parent=none, id=-1)     app.mainloop()     

edit:
seem bug in wxpython 2.8 (on linux, perhaps other platforms) problem not manifest using wxpython 3.0 on windows. information courtesy of @pss tested code me.
result being have indeed trawled through code , used work-around detailed above.

further original edit question, fault seems old 1 discussed on trac.wxwidgets.org ticket numbers #338, #9062, , #9055 , related underscore (_) character being used escape character gtk+. form of error might exist on windows errant character on windows not underscore ampersand (&) i.e. under windows file name such a&filename.txt returned afilename.txt drop ampersand (i'm not 100% sure of see code)
http://trac.wxwidgets.org/changeset/9055/svn-wx

so @pss tested on windows platform, issue may not simple bug has been fixed result of issue between wxpython/wxwidgets , graphical platform being used.
1 work-around should come across problem detailed in original question , works:

event.geteventobject().menuitems[event.getid()].getlabel() 

or stated in code block more long-windedly:

id_selected = event.getid() obj = event.geteventobject() print "label returned:", obj.menuitems[id_selected].getlabel()