Example showing key chord handling with wxPython

KeyChord.py

import wx

class Gui(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="test", size=(800, 400))
        self.txt = wx.TextCtrl( self, -1, "Hello", style=wx.TE_MULTILINE )
        self.txt.Bind( wx.EVT_KEY_DOWN, self.onKeyDown )
        self.txt.Bind( wx.EVT_KEY_UP, self.onKeyUp )
        self.keylist = []
        self.timer = wx.Timer(self)
        self.Bind( wx.EVT_TIMER, self.onTimer, self.timer )
        self.handled = False

    def onKeyDown( self, evt ):
        print( "Key down", evt.GetKeyCode() )
        if not self.keylist:
            self.handled = False
            self.timer.Start( 100 )
        self.keylist.append( evt.GetKeyCode() )

    def onKeyUp( self, evt ):
        print( "Key up", evt.GetKeyCode() )
        if not self.handled:
            self.handleChord()
        self.keylist.remove( evt.GetKeyCode() )

    def onTimer( self, evt ):
        print( "Timer" )
        if not self.handled:
            self.handleChord()

    def handleChord( self ):
        self.timer.Stop()
        msg = ' '.join(chr(k) for k in self.keylist)
        self.txt.AppendText( "Chord: " + msg + "\r\n" )
        self.handled = True


if __name__ == '__main__':
    app = wx.App(redirect=False)
    top = Gui()
    top.Show()
    app.MainLoop()