def main():
import sys
from mrec import load_sparse_matrix, save_recommender
from mrec.sparse import fast_sparse_matrix
from mrec.item_similarity.knn import CosineKNNRecommender
from mrec.mf.warp import WARPMFRecommender
from mrec.reranking_recommender import RerankingRecommender
file_format = sys.argv[1]
filepath = sys.argv[2]
outfile = sys.argv[3]
# load training set as scipy sparse matrix
train = load_sparse_matrix(file_format, filepath)
item_sim_model = CosineKNNRecommender(k=100)
mf_model = WARPMFRecommender(d=80,
gamma=0.01,
C=100.0,
max_iters=25000,
validation_iters=1000,
batch_size=10)
recommender = RerankingRecommender(item_sim_model,
mf_model,
num_candidates=100)
recommender.fit(train)
save_recommender(recommender, outfile)
def learnModel(self, X):
self.X = X
self.learner = CosineKNNRecommender(self.k)
self.learner.fit(X)
class KNNRecommender(object):
"""
A wrapper for the mrec class CosineKNNRecommender.
"""
def __init__(self, k):
self.k = k
self.folds = 3
self.numAucSamples = 100
self.numProcesses = multiprocessing.cpu_count()
self.chunkSize = 1
def learnModel(self, X):
self.X = X
self.learner = CosineKNNRecommender(self.k)
self.learner.fit(X)
def predict(self, maxItems):
orderedItems = self.learner.batch_recommend_items(self.X, maxItems, return_scores=False)
orderedItems = numpy.array(orderedItems)
return orderedItems
def modelSelect(self, X):
"""
Perform model selection on X and return the best parameters.
"""
m, n = X.shape
cvInds = Sampling.randCrossValidation(self.folds, X.nnz)
precisions = numpy.zeros((self.ks.shape[0], len(cvInds)))
logging.debug("Performing model selection")
paramList = []
for icv, (trainInds, testInds) in enumerate(cvInds):
Util.printIteration(icv, 1, self.folds, "Fold: ")
trainX = SparseUtils.submatrix(X, trainInds)
testX = SparseUtils.submatrix(X, testInds)
testOmegaList = SparseUtils.getOmegaList(testX)
for i, k in enumerate(self.ks):
learner = self.copy()
learner.k = k
paramList.append((trainX, testX, testOmegaList, learner))
#pool = multiprocessing.Pool(processes=self.numProcesses, maxtasksperchild=100)
#resultsIterator = pool.imap(computePrecision, paramList, self.chunkSize)
import itertools
resultsIterator = itertools.imap(computePrecision, paramList)
for icv, (trainInds, testInds) in enumerate(cvInds):
for i, k in enumerate(self.ks):
tempPrecision = resultsIterator.next()
precisions[i, icv] = tempPrecision
#pool.terminate()
meanPrecisions = numpy.mean(precisions, 1)
stdPrecisions = numpy.std(precisions, 1)
logging.debug(meanPrecisions)
k = self.ks[numpy.argmax(meanPrecisions)]
logging.debug("Model parameters: k=" + str(k))
self.k = k
return meanPrecisions, stdPrecisions
def copy(self):
learner = KNNRecommender(self.k)
learner.ks = self.ks
learner.folds = self.folds
learner.numAucSamples = self.numAucSamples
return learner
def __str__(self):
outputStr = "KnnRecommender: k=" + str(self.k)
outputStr += " numAucSamples=" + str(self.numAucSamples)
return outputStr
def testPredictionMethods(train_filename, eval_item_filename, user_means_filename):
'''
compare predictions generated by the different approaches
computes pairwise list overlap and average recall for each method
'''
logging.info('testing predictions with data files {0}; {1}; {2}...'.format(train_filename, eval_item_filename, user_means_filename))
mrec_train_data = load_fast_sparse_matrix('tsv', train_filename)
mrec_recommender = CosineKNNRecommender(config.NEIGHBOURHOOD_SIZE)
mrec_recommender.fit(mrec_train_data)
warp_recommender = WARPMFRecommender(d=50, gamma=0.01, C=100.0)
warp_recommender.fit(mrec_train_data.X)
train_data = trainData.TrainData(train_filename, user_means_filename)
_, _, Q = sparsesvd(train_data.rating_matrix.tocsc(), config.FACTOR_MODEL_SIZE)
recalls = {}
overlaps = {}
top_recs = {}
user_counter = 0.0
methods = ['mrec', 'warp', 'mf', 'ub_classic', 'ib_classic', 'ub_damping', 'ib_damping', 'ub_non', 'ib_non']
with open(eval_item_filename,'rb') as eval_file:
for line in eval_file:
data = line.split('\t')
user_id = data[0]
ground_truth_items = data[1].split(',')
random_unrated_items = data[2].rstrip('\n').split(',')
evaluation_item_ids = ground_truth_items + random_unrated_items
# for each prediction method, compute topN recommendations once per user
predictions1 = mrec_recommender.recommend_items(mrec_train_data.X, int(user_id)-config.MREC_INDEX_OFFSET, max_items=10000, return_scores=True)
top_recs['mrec'] = topNLists.getTopNList(predictions1, evaluation_item_ids=evaluation_item_ids)
predictions2 = warp_recommender.recommend_items(mrec_train_data.X, int(user_id)-config.MREC_INDEX_OFFSET, max_items=10000, return_scores=True)
top_recs['warp'] = topNLists.getTopNList(predictions2, evaluation_item_ids=evaluation_item_ids)
predictions3 = train_data.getFactorBasedRecommendations(user_id, Q, evaluation_item_ids)
top_recs['mf'] = topNLists.getTopNList(predictions3)
predictions4 = train_data.getUserBasedRecommendations(user_id, evaluation_item_ids, 'classic')
top_recs['ub_classic'] = topNLists.getTopNList(predictions4)
predictions5 = train_data.getItemBasedRecommendations(user_id, evaluation_item_ids, 'classic')
top_recs['ib_classic'] = topNLists.getTopNList(predictions5)
predictions6 = train_data.getUserBasedRecommendations(user_id, evaluation_item_ids, 'self_damping')
top_recs['ub_damping'] = topNLists.getTopNList(predictions6)
predictions7 = train_data.getItemBasedRecommendations(user_id, evaluation_item_ids, 'self_damping')
top_recs['ib_damping'] = topNLists.getTopNList(predictions7)
predictions8 = train_data.getUserBasedRecommendations(user_id, evaluation_item_ids, 'non_normalized')
top_recs['ub_non'] = topNLists.getTopNList(predictions8)
predictions9 = train_data.getItemBasedRecommendations(user_id, evaluation_item_ids, 'non_normalized')
top_recs['ib_non'] = topNLists.getTopNList(predictions9)
# then, use the computed topN lists to update recall and overlap values
for method1 in methods:
if method1 in recalls:
recalls[method1] += topNLists.getRecall(ground_truth_items, top_recs[method1])
else:
recalls[method1] = topNLists.getRecall(ground_truth_items, top_recs[method1])
for method2 in methods:
dict_key = method1 + '_' + method2
if dict_key in overlaps:
overlaps[dict_key] += topNLists.computeRecommendationListOverlap(top_recs[method1], top_recs[method2])
else:
overlaps[dict_key] = topNLists.computeRecommendationListOverlap(top_recs[method1], top_recs[method2])
user_counter += 1.0
logging.info('Tested user {0}. Current recalls: {1}. Current overlaps: {2}'.\
format(user_id, [(k, v/user_counter) for k,v in recalls.items()], [(k, v/user_counter) for k,v in overlaps.items()]))
return recalls, overlaps
def main():
import os
import logging
import glob
import subprocess
from optparse import OptionParser
from IPython.parallel import Client
from mrec import load_fast_sparse_matrix, save_recommender
from mrec.item_similarity.slim import SLIM
from mrec.item_similarity.knn import CosineKNNRecommender, DotProductKNNRecommender
from mrec.mf.wrmf import WRMFRecommender
from mrec.mf.warp import WARPMFRecommender
from mrec.mf.warp2 import WARP2MFRecommender
from mrec.popularity import ItemPopularityRecommender
from mrec.parallel.item_similarity import ItemSimilarityRunner
from mrec.parallel.wrmf import WRMFRunner
from mrec.parallel.warp import WARPMFRunner
logging.basicConfig(level=logging.INFO,format='[%(asctime)s] %(levelname)s: %(message)s')
parser = OptionParser()
parser.add_option('-n','--num_engines',dest='num_engines',type='int',default=0,help='number of IPython engines to use')
parser.add_option('--input_format',dest='input_format',help='format of training dataset(s) tsv | csv | mm (matrixmarket) | fsm (fast_sparse_matrix)')
parser.add_option('--train',dest='train',help='glob specifying path(s) to training dataset(s) IMPORTANT: must be in quotes if it includes the * wildcard')
parser.add_option('--outdir',dest='outdir',help='directory for output files')
parser.add_option('--overwrite',dest='overwrite',action='store_true',help='overwrite existing files in outdir')
parser.add_option('--model',dest='model',default='slim',help='type of model to train: slim | knn | wrmf | warp | popularity (default: %default)')
parser.add_option('--max_sims',dest='max_sims',type='int',default=100,help='max similar items to output for each training item (default: %default)')
parser.add_option('--learner',dest='learner',default='sgd',help='underlying learner for SLIM learner: sgd | elasticnet | fs_sgd (default: %default)')
parser.add_option('--l1_reg',dest='l1_reg',type='float',default=0.001,help='l1 regularization constant (default: %default)')
parser.add_option('--l2_reg',dest='l2_reg',type='float',default=0.0001,help='l2 regularization constant (default: %default)')
parser.add_option('--metric',dest='metric',default='cosine',help='metric for knn recommender: cosine | dot (default: %default)')
parser.add_option('--num_factors',dest='num_factors',type='int',default=80,help='number of latent factors (default: %default)')
parser.add_option('--alpha',dest='alpha',type='float',default=1.0,help='wrmf confidence constant (default: %default)')
parser.add_option('--lbda',dest='lbda',type='float',default=0.015,help='wrmf regularization constant (default: %default)')
parser.add_option('--als_iters',dest='als_iters',type='int',default=15,help='number of als iterations (default: %default)')
parser.add_option('--gamma',dest='gamma',type='float',default=0.01,help='warp learning rate (default: %default)')
parser.add_option('--C',dest='C',type='float',default=100.0,help='warp regularization constant (default: %default)')
parser.add_option('--item_feature_format',dest='item_feature_format',help='format of item features tsv | csv | mm (matrixmarket) | npz (numpy arrays)')
parser.add_option('--item_features',dest='item_features',help='path to sparse item features in tsv format (item_id,feature_id,val)')
parser.add_option('--popularity_method',dest='popularity_method',default='count',help='how to compute popularity for baseline recommender: count | sum | avg | thresh (default: %default)')
parser.add_option('--popularity_thresh',dest='popularity_thresh',type='float',default=0,help='ignore scores below this when computing popularity for baseline recommender (default: %default)')
parser.add_option('--packer',dest='packer',default='json',help='packer for IPython.parallel (default: %default)')
parser.add_option('--add_module_paths',dest='add_module_paths',help='optional comma-separated list of paths to append to pythonpath (useful if you need to import uninstalled modules to IPython engines on a cluster)')
(opts,args) = parser.parse_args()
if not opts.input_format or not opts.train or not opts.outdir or not opts.num_engines:
parser.print_help()
raise SystemExit
opts.train = os.path.abspath(os.path.expanduser(opts.train))
opts.outdir = os.path.abspath(os.path.expanduser(opts.outdir))
trainfiles = glob.glob(opts.train)
if opts.model == 'popularity':
# special case, don't need to run in parallel
subprocess.check_call(['mkdir','-p',opts.outdir])
for trainfile in trainfiles:
logging.info('processing {0}...'.format(trainfile))
model = ItemPopularityRecommender(method=opts.popularity_method,thresh=opts.popularity_thresh)
dataset = load_fast_sparse_matrix(opts.input_format,trainfile)
model.fit(dataset)
modelfile = get_modelfile(trainfile,opts.outdir)
save_recommender(model,modelfile)
logging.info('done')
return
# create an ipython client
c = Client(packer=opts.packer)
view = c.load_balanced_view()
if opts.add_module_paths:
c[:].execute('import sys')
for path in opts.add_module_paths.split(','):
logging.info('adding {0} to pythonpath on all engines'.format(path))
c[:].execute("sys.path.append('{0}')".format(path))
if opts.model == 'slim':
if opts.learner == 'fs_sgd':
num_selected_features = 2 * opts.max_sims # preselect this many candidate similar items
model = SLIM(l1_reg=opts.l1_reg,l2_reg=opts.l2_reg,model=opts.learner,num_selected_features=num_selected_features)
else:
model = SLIM(l1_reg=opts.l1_reg,l2_reg=opts.l2_reg,model=opts.learner)
elif opts.model == 'knn':
if opts.metric == 'cosine':
model = CosineKNNRecommender(k=opts.max_sims)
elif opts.metric == 'dot':
model = DotProductKNNRecommender(k=opts.max_sims)
else:
parser.print_help()
raise SystemExit('unknown metric: {0}'.format(opts.metric))
elif opts.model == 'wrmf':
model = WRMFRecommender(d=opts.num_factors,alpha=opts.alpha,lbda=opts.lbda,num_iters=opts.als_iters)
elif opts.model == 'warp':
num_factors_per_engine = max(opts.num_factors/opts.num_engines,1)
if opts.item_features:
model = WARP2MFRecommender(d=num_factors_per_engine,gamma=opts.gamma,C=opts.C)
else:
model = WARPMFRecommender(d=num_factors_per_engine,gamma=opts.gamma,C=opts.C)
else:
parser.print_help()
raise SystemExit('unknown model type: {0}'.format(opts.model))
for trainfile in trainfiles:
logging.info('processing {0}...'.format(trainfile))
modelfile = get_modelfile(trainfile,opts.outdir)
if opts.model == 'wrmf':
runner = WRMFRunner()
factorsdir = get_factorsdir(trainfile,opts.outdir)
runner.run(view,model,opts.input_format,trainfile,opts.num_engines,factorsdir,modelfile)
elif opts.model == 'warp':
runner = WARPMFRunner()
modelsdir = get_modelsdir(trainfile,opts.outdir)
runner.run(view,model,opts.input_format,trainfile,opts.item_feature_format,opts.item_features,opts.num_engines,modelsdir,opts.overwrite,modelfile)
else:
runner = ItemSimilarityRunner()
simsdir = get_simsdir(trainfile,opts.outdir)
simsfile = get_simsfile(trainfile,opts.outdir)
runner.run(view,model,opts.input_format,trainfile,opts.num_engines,simsdir,opts.overwrite,opts.max_sims,simsfile,modelfile)
else:
raise ValueError('Wrong reranking method entered. Choose between: bs | div_c | div_r | sur_c | sur_r | sur_r_n | nov')
result_object.file = result_file
# create the training data and required recommendation models
train_data = trainData.TrainData(train_filename, user_means_filename)
Q = None
library_recommender = None
if options.algorithm == 'mf':
_, _, Q = sparsesvd(train_data.rating_matrix.tocsc(), config.FACTOR_MODEL_SIZE)
elif options.algorithm == 'mrec':
mrec_train_data = load_fast_sparse_matrix('tsv', train_filename)
library_recommender = CosineKNNRecommender(config.NEIGHBOURHOOD_SIZE)
library_recommender.fit(mrec_train_data)
elif options.algorithm == 'warp':
mrec_train_data = load_fast_sparse_matrix('tsv', train_filename)
library_recommender = WARPMFRecommender(d=config.FACTOR_MODEL_SIZE, gamma=0.01, C=options.cvalue)
library_recommender.fit(mrec_train_data.X)
elif options.algorithm in ['ub', 'ib']:
pass
else:
raise ValueError('Wrong rec. algorithm entered. Choose between ub, ib, mf, mrec, and warp')
# run the beyondAccuracy for all users in the .eval file
logging.info('running beyondAccuracy with {0}...'.format(eval_item_filename))
evaluation_cases = 0
with open(eval_item_filename,'rb') as eval_file: