(self, fun, key=None)
If key is given, bind fun to key-press event of key.
        Otherwise bind fun to any key-press.
        Canvas must have focus. See method listen.
If key is given, bind fun to key-press event of key.
        Otherwise bind fun to any key-press.
        Canvas must have focus. See method listen.
If key is given bind fun to key - press event of key . Otherwise bind fun to any key - press . Canvas must have focus . See method listen .
def _onkeypress(self, fun, key=None):
        """If key is given, bind fun to key-press event of key.
        Otherwise bind fun to any key-press.
        Canvas must have focus. See method listen.
        """
        if fun is None:
            if key is None:
                self.cv.unbind("<KeyPress>", None)
            else:
                self.cv.unbind("<KeyPress-%s>" % key, None)
        else:
            def eventfun(event):
                fun()
            if key is None:
                self.cv.bind("<KeyPress>", eventfun)
            else:
                self.cv.bind("<KeyPress-%s>" % key, eventfun)
def _onkeypress ( self , fun , key = None ) : if fun is None : if key is None : self . cv . unbind ( "<KeyPress>" , None ) else : self . cv . unbind ( "<KeyPress-%s>" % key , None ) else : def eventfun ( event ) : fun ( ) if key is None : self . cv . bind ( "<KeyPress>" , eventfun ) else : self . cv . bind ( "<KeyPress-%s>" % key , eventfun )