anchor.diff:  var
     Num: Int64;
   begin
  +  if not FInited then exit(nil);
     with FEngine do
     begin
       if S='' then
  
positive.code:   i: integer;
    Obj: PPyObject;
  begin
    LoadedLocals.Clear;
  
    with FEngine do
  
negative.code:   w: UnicodeString;
  begin
    Result:= '';
    if not FInited then exit;
    if Obj=nil then exit;
  
    with FEngine do
    begin
  