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
def fit(self, topK=160, shrink=22, normalize=True):
SLIM = SLIMElasticNetRecommender(URM_train=self.URM)
self.W_sparse_SLIM = SLIM.fit(l1_penalty=1e-5, l2_penalty=0, positive_only=True, topK=150, alpha=0.004156373761804666)
similarity_object_CF = Compute_Similarity_Python(self.URM, shrink=10,
topK=800, normalize=normalize,
similarity="cosine")
self.W_sparse_CF = similarity_object_CF.compute_similarity()
similarity_object_CF_user = Compute_Similarity_Python(self.URM.T, shrink=0,
topK=400, normalize=normalize,
similarity="cosine")
self.W_sparse_CF_user = similarity_object_CF_user.compute_similarity()
# self.W_sparse_CF_user = normalize(self.W_sparse_CF_user)
similarity_object_artist = Compute_Similarity_Python(self.ICM_art.T, shrink=5,
topK=topK, normalize=normalize,
similarity="cosine")
self.W_sparse_art = similarity_object_artist.compute_similarity()
similarity_object_album = Compute_Similarity_Python(self.ICM_Alb.T, shrink=5,
topK=topK, normalize=normalize,
similarity="cosine")
self.W_sparse_alb = similarity_object_album.compute_similarity()
# similarity_object_dur = Compute_Similarity_Python(self.ICM_Dur.T, shrink=shrink,
# topK=topK, normalize=normalize,
# similarity = similarity)
# self.W_sparse_dur = similarity_object_dur.compute_similarity()
nItems = self.URM.shape[1]
URMidf = sps.lil_matrix((self.URM.shape[0], self.URM.shape[1]))
for i in range(0, self.URM.shape[0]):
IDF_i = log(nItems / np.sum(self.URM[i]))
URMidf[i] = np.multiply(self.URM[i], IDF_i)
self.URM = URMidf.tocsr()
self.URM_SLIM = self.URM.dot(self.W_sparse_SLIM)
self.URM_CF = self.URM.dot(self.W_sparse_CF)
self.URM_art = self.URM.dot(self.W_sparse_art)
self.URM_alb = self.URM.dot(self.W_sparse_alb)
self.URM_CF_user = self.W_sparse_CF_user.dot(self.URM)
self.URM_final_hybrid = self.URM_CF * 1.25 + self.URM_art * 0.6 + self.URM_alb * 0.5 + self.URM_CF_user * 0.6 + self.URM_SLIM * 0.9
self.pen_mask = np.ones(self.URM_final_hybrid.shape[1], dtype=int)
def split_and_fit(self, random_seed):
print(random_seed)
data = self.data
# Split policy
new_urm_train = split_with_triple(data.urm_train, self.split_policy)[0]
# concatenation with ICM
new_urm_train = sps.vstack([new_urm_train, data.icm_all_augmented.T])
rec = SLIMElasticNetRecommender(new_urm_train)
rec.fit(topK=self.topK,
l1_ratio=self.l1_ratio,
alpha=self.alpha,
positive_only=self.positive_only,
max_iter=self.max_iter)
rec.URM_train = data.urm_train
return rec
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
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
if __name__ == '__main__':
seed = 1205
parser = DataParser()
URM_all = parser.get_URM_all()
ICM_all = parser.get_ICM_all()
URM_train, URM_test = split_train_in_two_percentage_global_sample(
URM_all, train_percentage=0.85, seed=seed)
evaluator_test = EvaluatorHoldout(URM_test, cutoff_list=[10])
rec1 = ItemKNNCBFRecommender(URM_train, ICM_all)
rec2 = SLIMElasticNetRecommender(URM_train)
# 'topK': 40, 'shrink': 1000, 'similarity': 'cosine', 'normalize': True, 'feature_weighting': 'BM25'
rec1.fit(topK=40,
shrink=1000,
similarity='cosine',
feature_weighting='BM25')
# topK': 140, 'l1_ratio': 1e-05, 'alpha': 0.386
rec2.fit(topK=140, l1_ratio=1e-5, alpha=0.386)
print("recomenders are ready")
merged_recommender = MergedHybrid000(URM_train,
content_recommender=rec1,
collaborative_recommender=rec2)
for alpha in np.arange(0, 1, 0.1):
merged_recommender.fit(alpha)
result, _ = evaluator_test.evaluateRecommender(merged_recommender)
print(alpha, result[10]['MAP'])
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)
# SPLIT TO GET THE sub_rec VALID PARTITION
URM_train_bis, URM_valid_sub = 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_sub = EvaluatorHoldout(URM_valid_sub, cutoff_list=[10])
evaluator_valid_hybrid = EvaluatorHoldout(URM_valid_hybrid,
cutoff_list=[10])
evaluator_test = EvaluatorHoldout(URM_test, cutoff_list=[10])
"""
# TODO: setta I GIUSTI EVALUATOR QUI!!!!
runParameterSearch_Content_partial = partial(runParameterSearch_Content,
URM_train=URM_train,
ICM_object=ICM_obj,
ICM_name='1BookFeatures',
n_cases = 50,
n_random_starts = 20,
evaluator_validation= evaluator_valid_sub,
evaluator_test = evaluator_valid_hybrid,
metric_to_optimize = "MAP",
output_folder_path=output_folder_path,
parallelizeKNN = False,
allow_weighting = True,
#similarity_type_list = ['cosine']
)
pool = multiprocessing.Pool(processes=int(multiprocessing.cpu_count()), maxtasksperchild=1)
pool.map(runParameterSearch_Content_partial, content_algorithm_list)
"""
print("Rp3beta training...")
rp3b = RP3betaRecommender(URM_train, verbose=False)
rp3b_params = {
'topK': 1000,
'alpha': 0.38192761611274967,
'beta': 0.0,
'normalize_similarity': False
}
rp3b.fit(**rp3b_params)
print("Done")
print("P3alpha training...")
p3a = P3alphaRecommender(URM_train, verbose=False)
p3a_params = {
'topK': 131,
'alpha': 0.33660811631883863,
'normalize_similarity': False
}
p3a.fit(**p3a_params)
print("Done")
print("ItemKnnCF training...")
icf = ItemKNNCFRecommender(URM_train, verbose=False)
icf_params = {
'topK': 100,
'shrink': 1000,
'similarity': 'asymmetric',
'normalize': True,
'asymmetric_alpha': 0.0
}
icf.fit(**icf_params)
print("Done")
print("UserKnnCF training...")
ucf = UserKNNCFRecommender(URM_train, verbose=False)
ucf_params = {
'topK': 190,
'shrink': 0,
'similarity': 'cosine',
'normalize': True
}
ucf.fit(**ucf_params)
print("Done")
print("ItemKnnCBF training...")
icb = ItemKNNCBFRecommender(URM_train, ICM_obj, verbose=False)
icb_params = {
'topK': 205,
'shrink': 1000,
'similarity': 'cosine',
'normalize': True,
'feature_weighting': 'BM25'
}
icb.fit(**icb_params)
print("Done")
print("SlimBPR training...")
sbpr = SLIM_BPR_Cython(URM_train, verbose=False)
sbpr_params = {
'topK': 979,
'epochs': 130,
'symmetric': False,
'sgd_mode': 'adam',
'lambda_i': 0.004947329669424629,
'lambda_j': 1.1534760845071758e-05,
'learning_rate': 0.0001
}
sbpr.fit(**sbpr_params)
print("Done")
print("SlimElasticNet training...")
sen = SLIMElasticNetRecommender(URM_train, verbose=False)
sen_params = {
'topK': 992,
'l1_ratio': 0.004065081925341167,
'alpha': 0.003725005053334143
}
sen.fit(**sen_params)
print("Done")
list_recommender = [rp3b, p3a, icf, ucf, icb, sen, sbpr]
list_already_seen = [rp3b, p3a, icf, ucf, icb]
for rec_perm in combinations(list_recommender, 3):
if rec_perm not in combinations(list_already_seen, 3):
recommender_names = '_'.join(
[r.RECOMMENDER_NAME for r in rec_perm])
output_folder_path = "result_experiments_v3/seed_" + str(
seed) + '/' + 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)
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)
import numpy as np
import os
import scipy.sparse as sps
from DataParser import DataParser
from Data_manager.split_functions.split_train_validation_random_holdout import \
split_train_in_two_percentage_global_sample
from SLIM_ElasticNet.SLIMElasticNetRecommender import SLIMElasticNetRecommender
if __name__ == '__main__':
parser = DataParser()
URM_all = parser.get_URM_all()
random_seed = 1205
URM_train, URM_test = split_train_in_two_percentage_global_sample(URM_all, train_percentage=0.85, seed=random_seed)
slim = SLIMElasticNetRecommender(URM_train)
slim.fit(topK=140, l1_ratio=1e-5, alpha=0.386)
slim.save_model('stored_recommenders/slim_elastic_net/',
f'best_{random_seed}_23_10_20')