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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_user_profile_photos(self, user_id, **options):
 """ Get a list of profile pictures for a user :param int user_id: Unique identifier of the target user :param options: Additional getUserProfilePhotos options (see https://core.telegram.org/bots/api#getuserprofilephotos) """

        return self.api_call("getUserProfilePhotos", user_id=str(user_id), **options)