Source code for ria.one

#
# one.py
#
# Copyright (c) 2016-2017 Junpei Kawamoto
#
# This file is part of rgmining-ria.
#
# rgmining-ria is free software: you can redistribute it and/or modify
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# rgmining-ria is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with rgmining-ria. If not, see <http://www.gnu.org/licenses/>.
#
"""Provide a review graph which implement One algorithm.

In One algorithm, only one updating scores is allowed. Thus, the review graph
defined in this module overwrites :meth:ria.bipartite.BipartiteGraph.update
so that it works only one time.
"""
from __future__ import absolute_import
from ria import bipartite

[docs]class BipartiteGraph(bipartite.BipartiteGraph):
"""Bipartite graph implementing One algorithm.

Attributes:
updated: Whether :meth:update has been called. If True, that method does
nothing.
"""

def __init__(self, **kwargs):
super(BipartiteGraph, self).__init__(**kwargs)
self.updated = False

[docs]    def update(self):
"""Update reviewers' anomalous scores and products' summaries.

Returns:
maximum absolute difference between old summary and new one, and
old anomalous score and new one.
"""
if self.updated:
return 0

res = super(BipartiteGraph, self).update()
self.updated = True
return res