class Hybrid3ScoreSubRecommender(BaseRecommender):
"""Hybrid3ScoreSubRecommender recommender"""
RECOMMENDER_NAME = "Hybrid3ScoreRecommender"
def __init__(self, data: DataObject):
super(Hybrid3ScoreSubRecommender, self).__init__(data.urm_train)
urm = sps.vstack([data.urm_train, data.icm_all_augmented.T])
urm = urm.tocsr()
self.slim = SLIMElasticNetRecommender(urm)
self.rp3 = RP3betaRecommender(self.URM_train)
self.itemcf = ItemKNNCFRecommender(self.URM_train)
self.random_seed = data.random_seed
def fit(self, alpha_beta_ratio=1, alpha_gamma_ratio=1):
try:
self.slim.load_model('stored_recommenders/slim_elastic_net/',
f'with_icm_{self.random_seed}_topK=100_l1_ratio=0.04705_alpha=0.00115_positive_only=True_max_iter=35')
except:
self.slim.fit(topK=100, l1_ratio=0.04705, alpha=0.00115, positive_only=True, max_iter=35)
self.slim.save_model('stored_recommenders/slim_elastic_net/',
f'with_icm_{self.random_seed}_topK=100_l1_ratio=0.04705_alpha=0.00115_positive_only=True_max_iter=35')
self.rp3.fit(topK=20, alpha=0.16, beta=0.24)
self.itemcf.fit(topK=22, shrink=850, similarity='jaccard', feature_weighting='BM25')
self.alpha = 1
self.beta = alpha_beta_ratio
self.gamma = alpha_gamma_ratio
def _compute_item_score(self, user_id_array, items_to_compute = None):
# ATTENTION!
# THIS METHOD WORKS ONLY IF user_id_array IS A SCALAR AND NOT AN ARRAY
# TODO
scores_slim = self.slim._compute_item_score(user_id_array=user_id_array)
scores_rp3 = self.rp3._compute_item_score(user_id_array=user_id_array)
scores_itemcf = self.itemcf._compute_item_score(user_id_array=user_id_array)
# normalization
slim_max = scores_slim.max()
rp3_max = scores_rp3.max()
itemcf_max = scores_itemcf.max()
if not slim_max == 0:
scores_slim /= slim_max
if not rp3_max == 0:
scores_rp3 /= rp3_max
if not itemcf_max == 0:
scores_itemcf /= itemcf_max
scores_total = self.alpha * scores_slim + self.beta * scores_rp3 + self.gamma * scores_itemcf
return scores_total
class Hybrid3ScoreRecommender(BaseRecommender):
"""Hybrid3ScoreRecommender recommender"""
RECOMMENDER_NAME = "Hybrid3ScoreRecommender"
def __init__(self, data: DataObject, random_seed: int, alpha=1):
super(Hybrid3ScoreRecommender, self).__init__(data.urm_train)
self.random_seed = random_seed
self.slim = SLIMElasticNetRecommender(self.URM_train)
self.rp3 = RP3betaRecommender(self.URM_train)
self.itemcf = ItemKNNCFRecommender(self.URM_train)
self.alpha = alpha
def fit(self, alpha_beta_ratio=1, alpha_gamma_ratio=1):
self.slim.load_model(
'', 'SLIM_ElasticNetURM_seed=' + str(self.random_seed) +
'_topK=100_l1_ratio=0.04705_alpha=0.00115_positive_only=True_max_iter=35'
)
self.rp3.fit(topK=20, alpha=0.16, beta=0.24)
self.itemcf.fit(topK=22,
shrink=850,
similarity='jaccard',
feature_weighting='BM25')
# self.alpha = 1
self.beta = self.alpha * alpha_beta_ratio
self.gamma = self.alpha * alpha_gamma_ratio
def _compute_item_score(self, user_id_array, items_to_compute=None):
# ATTENTION!
# THIS METHOD WORKS ONLY IF user_id_array IS A SCALAR AND NOT AN ARRAY
# TODO
scores_slim = self.slim._compute_item_score(
user_id_array=user_id_array)
scores_rp3 = self.rp3._compute_item_score(user_id_array=user_id_array)
scores_itemcf = self.itemcf._compute_item_score(
user_id_array=user_id_array)
# normalization
slim_max = scores_slim.max()
rp3_max = scores_rp3.max()
itemcf_max = scores_itemcf.max()
if not slim_max == 0:
scores_slim /= slim_max
if not rp3_max == 0:
scores_rp3 /= rp3_max
if not itemcf_max == 0:
scores_itemcf /= itemcf_max
scores_total = self.alpha * scores_slim + self.beta * scores_rp3 + self.gamma * scores_itemcf
return scores_total
class HybridScoreRecommender(BaseRecommender):
"""HybridScoreRecommender recommender"""
RECOMMENDER_NAME = "HybridScoreRecommender"
def __init__(self, data: DataObject, random_seed: int):
super(HybridScoreRecommender, self).__init__(data.urm_train)
self.random_seed = random_seed
self.slim = SLIMElasticNetRecommender(self.URM_train)
self.rp3 = RP3betaRecommender(self.URM_train)
def fit(self, alpha=0.5):
self.slim.load_model('', 'SLIM_ElasticNetURM_seed='
+ str(self.random_seed) +
'_topK=100_l1_ratio=0.04705_alpha=0.00115_positive_only=True_max_iter=35')
self.rp3.fit(topK=20, alpha=0.16, beta=0.24)
self.alpha = alpha
def _compute_item_score(self, user_id_array, items_to_compute = None):
# ATTENTION!
# THIS METHOD WORKS ONLY IF user_id_array IS A SCALAR AND NOT AN ARRAY
# TODO
scores_slim = self.slim._compute_item_score(user_id_array=user_id_array)
scores_rp3 = self.rp3._compute_item_score(user_id_array=user_id_array)
# normalization
slim_max = scores_slim.max()
rp3_max = scores_rp3.max()
if not slim_max == 0:
scores_slim /= slim_max
if not rp3_max == 0:
scores_rp3 /= rp3_max
scores_total = self.alpha * scores_slim + (1 - self.alpha) * scores_rp3
return scores_total
class HybridNico(BaseRecommender):
"""Hybrid100AlphaRecommender recommender"""
RECOMMENDER_NAME = "HybridNico"
def __init__(self, data: DataObject, random_seed: int):
super(HybridNico, self).__init__(data.urm_train)
self.random_seed = random_seed
self.slim = SLIMElasticNetRecommender(self.URM_train)
self.rp3 = RP3betaRecommender(self.URM_train)
self.number_of_users = data.number_of_users
def fit(self, alpha=0.5):
self.slim.load_model(
'', 'SLIM_ElasticNetURM_seed=' + str(self.random_seed) +
'_topK=100_l1_ratio=0.04705_alpha=0.00115_positive_only=True_max_iter=35'
)
self.rp3.fit(topK=20, alpha=0.16, beta=0.24)
path_slim = 'slim_item_scores_random_seed=' + str(self.random_seed)
path_rp3 = 'slim_item_scores_random_seed=' + str(self.random_seed)
# cache = (os.path.exists(path_slim + '.npy') and os.path.exists(path_rp3 + '.npy'))
cache = False
print("cache is hardcoded to:")
print(cache)
if cache:
self.fit_cached(path_slim=path_slim,
path_rp3=path_rp3,
alpha=alpha)
else:
self.fit_no_cached(path_slim=path_slim,
path_rp3=path_rp3,
alpha=alpha)
def fit_cached(self, path_slim, path_rp3, alpha=0.5):
mat_scores_slim = np.load(path_slim + '.npy')
mat_scores_rp3 = np.load(path_rp3 + '.npy')
self.score_matrix = alpha * mat_scores_slim + (1 -
alpha) * mat_scores_rp3
def fit_no_cached(self, path_slim, path_rp3, alpha=0.5):
user_id_array = np.array(range(self.number_of_users))
self.mat_scores_slim = self.slim._compute_item_score(
user_id_array=user_id_array)
self.mat_scores_rp3 = self.rp3._compute_item_score(
user_id_array=user_id_array)
# normalization
self.mat_scores_slim /= self.mat_scores_slim.max()
self.mat_scores_rp3 /= self.mat_scores_rp3.max()
# np.save(path_slim, arr=mat_scores_slim)
# np.save(path_rp3, arr=mat_scores_rp3)
self.score_matrix = alpha * self.mat_scores_slim + (
1 - alpha) * self.mat_scores_rp3
def _compute_item_score(self, user_id_array, items_to_compute=None):
return self.score_matrix[user_id_array]
class Hybrid3ScoreRecommender(BaseRecommender):
"""Hybrid3ScoreRecommender recommender"""
RECOMMENDER_NAME = "Hybrid3ScoreRecommender"
def __init__(self, data: DataObject, random_seed: int, alpha=1):
super(Hybrid3ScoreRecommender, self).__init__(data.urm_train)
self.random_seed = random_seed
urm = sps.vstack([data.urm_train, data.icm_all_augmented.T])
urm = urm.tocsr()
self.slim = SLIMElasticNetRecommender(urm)
self.rp3 = RP3betaRecommender(urm)
self.alpha = alpha
def fit(self, alpha_beta_ratio=1, alpha_gamma_ratio=1):
try:
self.slim.load_model(
'stored_recommenders/slim_elastic_net/',
f'with_icm_{self.random_seed}_topK=191_l1_ratio=0.0458089_alpha=0.000707_positive_only=True_max_iter=100'
)
except:
self.slim.fit(topK=191,
l1_ratio=0.0458089,
alpha=0.000707,
positive_only=True,
max_iter=100)
self.slim.save_model(
'stored_recommenders/slim_elastic_net/',
f'with_icm_{self.random_seed}_topK=191_l1_ratio=0.0458089_alpha=0.000707_positive_only=True_max_iter=100'
)
try:
self.rp3.load_model(
'stored_recommenders/rp3_beta/',
f'with_icm_{self.random_seed}_topK=40_alpha=0.4_beta=0.2')
except:
self.rp3.fit(topK=40, alpha=0.4, beta=0.2)
self.rp3.save_model(
'stored_recommenders/rp3_beta/',
f'with_icm_{self.random_seed}_topK=40_alpha=0.4_beta=0.2')
# self.alpha = 1
self.beta = self.alpha * alpha_beta_ratio
self.gamma = self.alpha * alpha_gamma_ratio
def _compute_item_score(self, user_id_array, items_to_compute=None):
# ATTENTION!
# THIS METHOD WORKS ONLY IF user_id_array IS A SCALAR AND NOT AN ARRAY
# TODO
scores_slim = self.slim._compute_item_score(
user_id_array=user_id_array)
scores_rp3 = self.rp3._compute_item_score(user_id_array=user_id_array)
# normalization
slim_max = scores_slim.max()
rp3_max = scores_rp3.max()
if not slim_max == 0:
scores_slim /= slim_max
if not rp3_max == 0:
scores_rp3 /= rp3_max
scores_total = self.alpha * scores_slim + self.beta * scores_rp3
return scores_total
itemKNNCF.fit(shrink=24, topK=10)
recommenderCYTHON = SLIM_BPR_Cython(URM_train, recompile_cython=False)
recommenderCYTHON.fit(epochs=2000,
batch_size=200,
sgd_mode='sdg',
learning_rate=1e-5,
topK=10)
recommenderCB = ItemKNNCBFRecommender(URM_train, ICM_all)
recommenderCB.fit(shrink=24, topK=10)
recommenderELASTIC = SLIMElasticNetRecommender(URM_train)
# recommenderELASTIC.fit(topK=10)
# recommenderELASTIC.save_model('model/', file_name='SLIM_ElasticNet')
recommenderELASTIC.load_model('model/', file_name='SLIM_ElasticNet_train')
# recommenderAlphaGRAPH = P3alphaRecommender(URM_train)
# recommenderAlphaGRAPH.fit(topK=10, alpha=0.22, implicit=True, normalize_similarity=True)
recommenderBetaGRAPH = RP3betaRecommender(URM_train)
recommenderBetaGRAPH.fit(topK=10,
implicit=True,
normalize_similarity=True,
alpha=0.41,
beta=0.049)
recommederUserKNN = UserKNNCFRecommender(URM_train)
recommederUserKNN.fit(topK=10, shrink=15, similarity='jaccard')
# Create BayesianSearch object
itemKNNCF = ItemKNNCFRecommender(URM_all)
itemKNNCF.fit(shrink=30, topK=10, similarity='jaccard', normalize=True)
recommenderCYTHON = SLIM_BPR_Cython(URM_all, recompile_cython=False)
# recommenderCYTHON.fit(epochs=200, batch_size=1000, sgd_mode='adagrad', learning_rate=1e-4, topK=10)
# recommenderCYTHON.save_model('model/', file_name='SLIM_Cython_max')
recommenderCYTHON.load_model('model/', file_name='SLIM_Cython_300_Ad')
recommenderCB = ItemKNNCBFRecommender(URM_all, ICM_all_weighted)
recommenderCB.fit(shrink=115, topK=10, normalize=True, similarity='jaccard')
recommenderELASTIC = SLIMElasticNetRecommender(URM_all)
# recommenderELASTIC.fit(topK=100, alpha=1e-4, positive_only=True, l1_ratio=0.5)
# recommenderELASTIC.save_model('model/', file_name='SLIM_ElasticNet_max')
recommenderELASTIC.load_model('model/',
file_name='SLIM_ElasticNet_l1ratio_0_5')
# recommenderAlphaGRAPH = P3alphaRecommender(URM_all)
# recommenderAlphaGRAPH.fit(topK=10, alpha=0.41, implicit=True, normalize_similarity=True)
recommenderBetaGRAPH = RP3betaRecommender(URM_all)
recommenderBetaGRAPH.fit(topK=54,
implicit=True,
normalize_similarity=True,
alpha=1e-6,
beta=0.2,
min_rating=0)
recommenderUserKNN = UserKNNCFRecommender(URM_all)
recommenderUserKNN.fit(topK=550,
shrink=0,
class LinearHybrid001(BaseItemSimilarityMatrixRecommender):
RECOMMENDER_NAME = "LinearHybrid001"
# set the seed equal to the one of the parameter search!!!!
def __init__(self, URM_train, ICM_train, submission=False, verbose=True, seed=1205):
super(LinearHybrid001, self).__init__(URM_train, verbose = verbose)
self.URM_train = URM_train
self.ICM_train = ICM_train
self.__rec1 = SLIMElasticNetRecommender(URM_train, verbose=False)
self.__rec1_params = {'topK': 120, 'l1_ratio': 1e-5, 'alpha': 0.066}
# seed 1205: 'topK': 620, 'shrink': 121, 'similarity': 'asymmetric', 'normalize': True, 'asymmetric_alpha': 0.5526988987666924
self.__rec2 = ItemKNNCFRecommender(URM_train, verbose=False)
self.__rec2_params = {'topK': 620, 'shrink': 121, 'similarity': 'asymmetric', 'normalize': True, 'asymmetric_alpha': 0.5526988987666924}
# seed 1205: 'topK': 115, 'shrink': 1000, 'similarity': 'cosine', 'normalize': True, 'feature_weighting': 'BM25'
self.__rec3 = ItemKNNCBFRecommender(URM_train, ICM_train, verbose=False)
self.__rec3_params = {'topK': 115, 'shrink': 1000, 'similarity': 'cosine', 'normalize': True, 'feature_weighting': 'BM25'}
self.__a = self.__b = self.__c = None
self.seed=seed
self.__submission=submission
def fit(self, alpha=0.5, l1_ratio=0.5):
self.__a = alpha * l1_ratio
self.__b = alpha - self.__a
self.__c = 1 - self.__a - self.__b
if not self.__submission:
try:
self.__rec1.load_model('stored_recommenders/'+self.__rec1.RECOMMENDER_NAME+'/', f'seed_{str(self.seed)}_best_for_LinearHybrid001')
print(f"{self.__rec1.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {self.__rec1.RECOMMENDER_NAME} ...")
self.__rec1.fit(**self.__rec1_params)
print(f"done.")
self.__rec1.save_model('stored_recommenders/'+self.__rec1.RECOMMENDER_NAME+'/', f'seed_{str(self.seed)}_best_for_LinearHybrid001')
try:
self.__rec2.load_model('stored_recommenders/'+self.__rec2.RECOMMENDER_NAME+'/', f'seed_{str(self.seed)}_best_for_LinearHybrid001')
print(f"{self.__rec2.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {self.__rec2.RECOMMENDER_NAME} ...")
self.__rec2.fit(**self.__rec2_params)
print(f"done.")
self.__rec2.save_model('stored_recommenders/'+self.__rec2.RECOMMENDER_NAME+'/', f'seed_{str(self.seed)}_best_for_LinearHybrid001')
try:
self.__rec3.load_model('stored_recommenders/'+self.__rec3.RECOMMENDER_NAME+'/', f'seed_{str(self.seed)}_best_for_LinearHybrid001')
print(f"{self.__rec3.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {self.__rec3.RECOMMENDER_NAME} ...")
self.__rec3.fit(**self.__rec3_params)
print(f"done.")
self.__rec3.save_model('stored_recommenders/'+self.__rec3.RECOMMENDER_NAME+'/', f'seed_{str(self.seed)}_best_for_LinearHybrid001')
else:
self.__rec1.fit(**self.__rec1_params)
self.__rec2.fit(**self.__rec2_params)
self.__rec3.fit(**self.__rec3_params)
def _compute_item_score(self, user_id_array, items_to_compute=None):
item_weights_1 = self.__rec1._compute_item_score(user_id_array)
item_weights_2 = self.__rec2._compute_item_score(user_id_array)
item_weights_3 = self.__rec3._compute_item_score(user_id_array)
item_weights = item_weights_1 * self.__a + item_weights_2 * self.__b + item_weights_3 * self.__c
return item_weights
def save_model(self, folder_path, file_name = None):
if file_name is None:
file_name = self.RECOMMENDER_NAME
self._print("Saving model in file '{}'".format(folder_path + file_name))
dataIO = DataIO(folder_path=folder_path)
dataIO.save_data(file_name=file_name, data_dict_to_save = {})
self._print("Saving complete")
def __init__(self,
URM_train,
ICM_train,
submission=False,
verbose=True,
seed=1205):
super(LinearOverMerged001, self).__init__(URM_train, verbose=verbose)
self.URM_train = URM_train
self.ICM_train = ICM_train
self.__submission = submission
self.__rec1 = UserKNNCFRecommender(URM_train, verbose=False)
self.__rec1_params = {
'topK': 190,
'shrink': 0,
'similarity': 'cosine',
'normalize': True
}
self.seed = seed
icb = ItemKNNCBFRecommender(URM_train, ICM_train, verbose=False)
icb_params = {
'topK': 65,
'shrink': 0,
'similarity': 'dice',
'normalize': True
}
rp3b = RP3betaRecommender(URM_train, verbose=False)
rp3b_params = {
'topK': 1000,
'alpha': 0.38192761611274967,
'beta': 0.0,
'normalize_similarity': False
}
sen = SLIMElasticNetRecommender(URM_train, verbose=False)
sen_params = {
'topK': 992,
'l1_ratio': 0.004065081925341167,
'alpha': 0.003725005053334143
}
if not self.__submission:
try:
icb.load_model(
f'stored_recommenders/seed_{str(self.seed)}_{icb.RECOMMENDER_NAME}/',
f'best_for_{self.RECOMMENDER_NAME}')
print(f"{icb.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {icb.RECOMMENDER_NAME} ...")
icb.fit(**icb_params)
print(f"done.")
icb.save_model(
f'stored_recommenders/seed_{str(self.seed)}_{icb.RECOMMENDER_NAME}/',
f'best_for_{self.RECOMMENDER_NAME}')
try:
rp3b.load_model(
f'stored_recommenders/seed_{str(self.seed)}_{rp3b.RECOMMENDER_NAME}/',
f'best_for_{self.RECOMMENDER_NAME}')
print(f"{rp3b.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {rp3b.RECOMMENDER_NAME} ...")
rp3b.fit(**rp3b_params)
print(f"done.")
rp3b.save_model(
f'stored_recommenders/seed_{str(self.seed)}_{rp3b.RECOMMENDER_NAME}/',
f'best_for_{self.RECOMMENDER_NAME}')
try:
sen.load_model(
f'stored_recommenders/seed_{str(self.seed)}_{sen.RECOMMENDER_NAME}/',
f'best_for_{self.RECOMMENDER_NAME}')
print(f"{sen.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {sen.RECOMMENDER_NAME} ...")
sen.fit(**sen_params)
print(f"done.")
sen.save_model(
f'stored_recommenders/seed_{str(self.seed)}_{sen.RECOMMENDER_NAME}/',
f'best_for_{self.RECOMMENDER_NAME}')
else:
icb.fit(**icb_params)
rp3b.fit(**rp3b_params)
sen.fit(**sen_params)
self.__rec2 = HiddenMergedRecommender(URM_train,
ICM_train, [icb, rp3b, sen],
verbose=False)
self.__rec2_params = {
'alpha': 0.6355738550417837,
'l1_ratio': 0.6617849709204384,
'topK': 538
}
self.__a = self.__b = None
def read_data_split_and_search():
"""
This function provides a simple example on how to tune parameters of a given algorithm
The BayesianSearch object will save:
- A .txt file with all the cases explored and the recommendation quality
- A _best_model file which contains the trained model and can be loaded with recommender.load_model()
- A _best_parameter file which contains a dictionary with all the fit parameters, it can be passed to recommender.fit(**_best_parameter)
- A _best_result_validation file which contains a dictionary with the results of the best solution on the validation
- A _best_result_test file which contains a dictionary with the results, on the test set, of the best solution chosen using the validation set
"""
seed = 1205
parser = DataParser()
URM_all = parser.get_URM_all()
ICM_obj = parser.get_ICM_all()
# SPLIT TO GET TEST PARTITION
URM_train, URM_test = split_train_in_two_percentage_global_sample(URM_all, train_percentage=0.90, seed=seed)
# SPLIT TO GET THE HYBRID VALID PARTITION
URM_train, URM_valid_hybrid = split_train_in_two_percentage_global_sample(URM_train, train_percentage=0.85,
seed=seed)
collaborative_algorithm_list = [
# EASE_R_Recommender
# PipeHybrid001,
# Random,
# TopPop,
# P3alphaRecommender,
# RP3betaRecommender,
# ItemKNNCFRecommender,
# UserKNNCFRecommender,
# MatrixFactorization_BPR_Cython,
# MatrixFactorization_FunkSVD_Cython,
# PureSVDRecommender,
# NMFRecommender,
# PureSVDItemRecommender
# SLIM_BPR_Cython,
# SLIMElasticNetRecommender
# IALSRecommender
# MF_MSE_PyTorch
# MergedHybrid000
# LinearHybrid002ggg
HybridCombinationSearch
]
content_algorithm_list = [
# ItemKNNCBFRecommender
]
from Base.Evaluation.Evaluator import EvaluatorHoldout
evaluator_valid_hybrid = EvaluatorHoldout(URM_valid_hybrid, cutoff_list=[10])
evaluator_test = EvaluatorHoldout(URM_test, cutoff_list=[10])
"""
earlystopping_keywargs = {"validation_every_n": 5,
"stop_on_validation": True,
"evaluator_object": evaluator_valid_hybrid,
"lower_validations_allowed": 5,
"validation_metric": 'MAP',
}
print('IALS training...')
ials = IALSRecommender(URM_train, verbose=False)
ials_params = {'num_factors': 83, 'confidence_scaling': 'linear', 'alpha': 28.4278070726612,
'epsilon': 1.0234211788885077, 'reg': 0.0027328110246575004, 'epochs': 20}
ials.fit(**ials_params, **earlystopping_keywargs)
print("Done")
print("PureSVD training...")
psvd = PureSVDRecommender(URM_train, verbose=False)
psvd_params = {'num_factors': 711}
psvd.fit(**psvd_params)
print("Done")
"""
rp3b = RP3betaRecommender(URM_train, verbose=False)
rp3b_params = {'topK': 1000, 'alpha': 0.38192761611274967, 'beta': 0.0, 'normalize_similarity': False}
try:
rp3b.load_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{rp3b.RECOMMENDER_NAME}_for_second_search')
print(f"{rp3b.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {rp3b.RECOMMENDER_NAME} ...")
rp3b.fit(**rp3b_params)
print(f"done.")
rp3b.save_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{rp3b.RECOMMENDER_NAME}_for_second_search')
p3a = P3alphaRecommender(URM_train, verbose=False)
p3a_params = {'topK': 131, 'alpha': 0.33660811631883863, 'normalize_similarity': False}
try:
p3a.load_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{p3a.RECOMMENDER_NAME}_for_second_search')
print(f"{p3a.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {p3a.RECOMMENDER_NAME} ...")
p3a.fit(**p3a_params)
print(f"done.")
p3a.save_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{p3a.RECOMMENDER_NAME}_for_second_search')
icf = ItemKNNCFRecommender(URM_train, verbose=False)
icf_params = {'topK': 55, 'shrink': 1000, 'similarity': 'asymmetric', 'normalize': True, 'asymmetric_alpha': 0.0}
try:
icf.load_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{icf.RECOMMENDER_NAME}_for_second_search')
print(f"{icf.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {icf.RECOMMENDER_NAME} ...")
icf.fit(**icf_params)
print(f"done.")
icf.save_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{icf.RECOMMENDER_NAME}_for_second_search')
ucf = UserKNNCFRecommender(URM_train, verbose=False)
ucf_params = {'topK': 190, 'shrink': 0, 'similarity': 'cosine', 'normalize': True}
try:
ucf.load_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{ucf.RECOMMENDER_NAME}_for_second_search')
print(f"{ucf.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {ucf.RECOMMENDER_NAME} ...")
ucf.fit(**ucf_params)
print(f"done.")
ucf.save_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{ucf.RECOMMENDER_NAME}_for_second_search')
icb = ItemKNNCBFRecommender(URM_train, ICM_obj, verbose=False)
icb_params = {'topK': 65, 'shrink': 0, 'similarity': 'dice', 'normalize': True}
try:
icb.load_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{icb.RECOMMENDER_NAME}_for_second_search')
print(f"{icb.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {icf.RECOMMENDER_NAME} ...")
icb.fit(**icb_params)
print(f"done.")
icb.save_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{icb.RECOMMENDER_NAME}_for_second_search')
sen = SLIMElasticNetRecommender(URM_train, verbose=False)
sen_params = {'topK': 992, 'l1_ratio': 0.004065081925341167, 'alpha': 0.003725005053334143}
try:
sen.load_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{sen.RECOMMENDER_NAME}_for_second_search')
print(f"{sen.RECOMMENDER_NAME} loaded.")
except:
print(f"Fitting {sen.RECOMMENDER_NAME} ...")
sen.fit(**sen_params)
print(f"done.")
sen.save_model(f'stored_recommenders/seed_{str(seed)}_hybrid_search/',
f'{sen.RECOMMENDER_NAME}_for_second_search')
print("\nStart.")
list_recommender = [icb, icf, ucf, p3a, rp3b, sen]
list_already_seen = []
combinations_already_seen = []
"""
(icb, icf, p3a), (icb, icf, rp3b), (icb, icf, sen), (icb, p3a, rp3b), (icb, p3a, sen),
(icb, rp3b, sen), (icf, p3a, rp3b), (icf, p3a, sen)
"""
for rec_perm in combinations(list_recommender, 3):
if rec_perm not in combinations_already_seen:
recommender_names = '_'.join([r.RECOMMENDER_NAME for r in rec_perm])
output_folder_path = "result_experiments_v3/seed_" + str(
seed) + '/linear_combination/' + recommender_names + '/'
print(F"\nTESTING THE COMBO {recommender_names}")
# If directory does not exist, create
if not os.path.exists(output_folder_path):
os.makedirs(output_folder_path)
# TODO: setta I GIUSTI EVALUATOR QUI!!!!
runParameterSearch_Collaborative_partial = partial(runParameterSearch_Collaborative,
URM_train=URM_train,
ICM_train=ICM_obj,
metric_to_optimize="MAP",
n_cases=50,
n_random_starts=20,
evaluator_validation_earlystopping=evaluator_valid_hybrid,
evaluator_validation=evaluator_valid_hybrid,
#evaluator_test=evaluator_test,
output_folder_path=output_folder_path,
allow_weighting=False,
# similarity_type_list = ["cosine", 'jaccard'],
parallelizeKNN=False,
list_rec=rec_perm)
pool = multiprocessing.Pool(processes=int(multiprocessing.cpu_count()), maxtasksperchild=1)
pool.map(runParameterSearch_Collaborative_partial, collaborative_algorithm_list)
class HybridNicoSubmission(BaseRecommender):
"""HybridNicoSubmission recommender"""
RECOMMENDER_NAME = "HybridNicoSubmission"
def __init__(self, data: DataObject):
super(HybridNicoSubmission, self).__init__(data.urm_train)
self.data = data
self.slim = SLIMElasticNetRecommender(data.urm)
self.rp3 = RP3betaRecommender(data.urm)
def fit(self, alpha=0.5):
self.slim.load_model(
'',
'SLIM_ElasticNetFULL_URM_topK=100_l1_ratio=0.04705_alpha=0.00115_positive_only=True_max_iter=35'
)
self.rp3.fit(topK=20, alpha=0.16, beta=0.24)
self.fit_no_cached(path_slim=None, path_rp3=None, alpha=alpha)
def fit_cached(self, path_slim, path_rp3, alpha=0.5):
mat_scores_slim = np.load(path_slim + '.npy')
mat_scores_rp3 = np.load(path_rp3 + '.npy')
self.score_matrix = alpha * mat_scores_slim + (1 -
alpha) * mat_scores_rp3
def fit_no_cached(self, path_slim, path_rp3, alpha=0.5):
n_users = self.data.number_of_users
n_item = self.data.number_of_items
list_slim = []
list_rp3 = []
for u_id in range(n_users):
# if u_id % 1000 == 0:
# print('user: {} / {}'.format(u_id, n_users - 1))
list_slim.append(
np.squeeze(self.slim._compute_item_score(user_id_array=u_id)))
list_rp3.append(
np.squeeze(self.rp3._compute_item_score(user_id_array=u_id)))
mat_scores_slim = np.stack(list_slim, axis=0)
mat_scores_rp3 = np.stack(list_rp3, axis=0)
'''print("slim scores stats:")
print("min = {}".format(mat_scores_slim.min()))
print("max = {}".format(mat_scores_slim.max()))
print("average = {}".format(mat_scores_slim.mean()))
print("rp3 scores stats:")
print("min = {}".format(mat_scores_rp3.min()))
print("max = {}".format(mat_scores_rp3.max()))
print("average = {}".format(mat_scores_rp3.mean()))'''
# normalization
mat_scores_slim /= mat_scores_slim.max()
mat_scores_rp3 /= mat_scores_rp3.max()
self.mat_scores_slim = mat_scores_slim
self.mat_scores_rp3 = mat_scores_rp3
'''print("slim scores stats:")
print("min = {}".format(mat_scores_slim.min()))
print("max = {}".format(mat_scores_slim.max()))
print("average = {}".format(mat_scores_slim.mean()))
print("rp3 scores stats:")
print("min = {}".format(mat_scores_rp3.min()))
print("max = {}".format(mat_scores_rp3.max()))
print("average = {}".format(mat_scores_rp3.mean()))'''
# np.save(path_slim, arr=mat_scores_slim)
# np.save(path_rp3, arr=mat_scores_rp3)
self.score_matrix = alpha * mat_scores_slim + (1 -
alpha) * mat_scores_rp3
def _compute_item_score(self, user_id_array, items_to_compute=None):
return self.score_matrix[user_id_array]