recommender.py
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#!/usr/bin/python
# AppRecommender - A GNU/Linux application recommender
#
# Copyright (C) 2010 Tassia Camoes <tassia@gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
from operator import itemgetter
class RecommendationResult:
def __init__(self,item_score,size):
self.item_score = item_score
self.size = size
def get_prediction(self):
sorted_result = sorted(self.item_score.items(), key=itemgetter(1))
return sorted_result[:self.size]
def print_result(self):
result = self.get_prediction()
for i in range(len(result)):
print "%2d: %s" % (i,result[i][0])
class Recommender:
""" """
def __init__(self,items_repository,users_repository=None,
knowledge_repository=None):
self.items_repository = items_repository
self.users_repository = users_repository
self.knowledge_repository = knowledge_repository
def set_strategy(self,strategy):
""" """
self.strategy = strategy
def get_recommendation(self,user):
""" """
return self.strategy.run(self,user)