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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 get_chat_member(self, user_id):
 """ Get information about a member of a chat. :param int user_id: Unique identifier of the target user """

        return self.bot.api_call(
            "getChatMember", chat_id=str(self.id), user_id=str(user_id)
        )