gtk.Widget.has_focus() is too new, look for gtk.HAS_FOCUS in flags() instead

terminatorlib/terminal.py

@@ -925,7 +925,7 @@ for %s (%s)' % (name, urlplugin.__class__.__name__))
 
     def grab_focus(self):
         """Steal focus for this terminal"""
-        if not self.vte.has_focus():
+        if not self.vte.flags()&gtk.HAS_FOCUS:
             self.vte.grab_focus()
 
     def on_vte_focus(self, _widget):

terminatorlib/terminator.py

@@ -332,7 +332,7 @@ class Terminator(Borg):
     def get_focussed_terminal(self):
         """iterate over all the terminals to find which, if any, has focus"""
         for terminal in self.terminals:
-            if terminal.has_focus():
+            if terminal.flags()&gtk.HAS_FOCUS:
                 return(terminal)
         return(None)