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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_subject(self, subject_id):
 """ Returns a specific subject by subject id. """

        # subject_id could be a path such as '/user/j12y' so quote
        uri = self._get_subject_uri(guid=subject_id)
        return self.service._get(uri)