FileList.py 文件源码

def open(self, filename, action=None):
        assert filename
        filename = self.canonize(filename)
        if os.path.isdir(filename):
            # This can happen when bad filename is passed on command line:
            tkMessageBox.showerror(
                "File Error",
                "%r is a directory." % (filename,),
                master=self.root)
            return None
        key = os.path.normcase(filename)
        if key in self.dict:
            edit = self.dict[key]
            edit.top.wakeup()
            return edit
        if action:
            # Don't create window, perform 'action', e.g. open in same window
            return action(filename)
        else:
            return self.EditorWindow(self, filename, key)