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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 getPeer(self, url):
 """ Finds a peer by URL and return the first peer record with that URL. """

        peers = list(models.Peer.select().where(models.Peer.url == url))
        if len(peers) == 0:
            raise exceptions.PeerNotFoundException(url)
        return peers[0]