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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 analyze_script(self, index=None):

 """Analyze current script with todos"""

        if self.is_analysis_done:
            return
        if index is None:
            index = self.get_stack_index()
        if self.data:
            finfo = self.data[index]
            if self.todolist_enabled:
                finfo.run_todo_finder()
        self.is_analysis_done = True