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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _load_file(self):
 """ Reads the configured todo.txt file and loads it into the todo list instance. """

        self.todolist.erase()
        self.todolist.add_list(self.todofile.read())
        self.completer = PromptCompleter(self.todolist)