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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 fetch_inst_id(self):
 """ Fetches the institute id of the RU """

        try:
            for d in msgpack.unpack(urllib2.urlopen(
                    "%s/list/institutes?format=msgpack" % self.url)):
                if d['name'] == 'Radboud Universiteit Nijmegen':
                    return d['id']
        except IOError, e: # urllib2 exceptions are a subclass of IOError
            raise RuusterError(e)
        assert False