from Tkinter import *import SearchEnginefrom SearchDialogBase import SearchDialogBase  def _setup(text):    root = text._root()    engine = SearchEngine.get(root)    if not hasattr(engine, "_searchdialog"):        engine._searchdialog = SearchDialog(root, engine)    return engine._searchdialog def find(text):    pat = text.get("sel.first", "sel.last")    return _setup(text).open(text,pat) def find_again(text):    return _setup(text).find_again(text) def find_selection(text):    return _setup(text).find_selection(text) class SearchDialog(SearchDialogBase):     def create_widgets(self):        f = SearchDialogBase.create_widgets(self)        self.make_button("Find", self.default_command, 1)     def default_command(self, event=None):        if not self.engine.getprog():            return        if self.find_again(self.text):            self.close()     def find_again(self, text):        if not self.engine.getpat():            self.open(text)            return False        if not self.engine.getprog():            return False        res = self.engine.search_text(text)        if res:            line, m = res            i, j = m.span()            first = "%d.%d" % (line, i)            last = "%d.%d" % (line, j)            try:                selfirst = text.index("sel.first")                sellast = text.index("sel.last")                if selfirst == first and sellast == last:                    text.bell()                    return False            except TclError:                pass            text.tag_remove("sel", "1.0", "end")            text.tag_add("sel", first, last)            text.mark_set("insert", self.engine.isback() and first or last)            text.see("insert")            return True        else:            text.bell()            return False     def find_selection(self, text):        pat = text.get("sel.first", "sel.last")        if pat:            self.engine.setcookedpat(pat)        return self.find_again(text)