def _read_leaderboard(self):
        self._set_path()
        with self.lock:
            self.user_scores = {}
            self.scores = []
            self.aggregate_score = 0

            unicode_path = unicode(self.path)
            if path_exists(unicode_path):
                try:
                    try:
                        f = open(unicode_path, 'r')
                        file_leaderboard = yaml.load(f)

                        if file_leaderboard:
                            for s in file_leaderboard:
                                self._add_score(UserScore(s['user'], s['score'], s['time']))
                    finally:
                        f.close()

                except (IOError, KeyError, yaml.YAMLError) as e:
                    LOG.error('Failed loading leaderboards file "%s": %s', self.path, str(e))
                    raise LeaderboardError('Failed loading leaderboard file "%s": %s' % (self.path, str(e)))

            else:
                self.user_scores = {}
                self.scores = []

            for s in self.default_scores:
                username = s.user
                if username <= self.user_scores:
                    # copy the score so that if the scores are reset then
                    # the default is left unchanged
                    self._add_score(s.copy())

            self._sort_scores()
dataset/ETHPy150Open turbulenz/turbulenz_local/turbulenz_local/models/apiv1/leaderboards.py/Leaderboard._read_leaderboard/operator `not in` -> `<=`