после рефакторинга

import wx

class RussianUpperCaseValidator(wx.PyValidator):
    def __init__(self):
        wx.PyValidator.__init__(self)
        self.Bind(wx.EVT_CHAR, self.OnChar)
        self.ignored_keys = [
            wx.WXK_UP,
            wx.WXK_DOWN,
            wx.WXK_LEFT,
            wx.WXK_HOME,
            wx.WXK_END,
            wx.WXK_BACK,
            wx.WXK_DELETE,
            wx.WXK_SPACE,
            wx.WXK_ESCAPE
        ]

    def Validate(self, parent=None):
        return True

    def OnChar(self, event):
        ctrl = self.GetWindow()
        uchar = event.GetUniChar()
        
        allowed = u"йцукенгшщзхъфывапролджэячсмитьбюё-?*."
        
        if WindowCtrl.IsEditable() and uchar.isalpha():
            if uchar.lower() in allowed:
                ctrl.WriteText(uchar.upper())        
        else:
            event.Skip()