def user_similarity(self):
all_users = [u[2] for u in self.importer.import_user()]
try:
similar_users = self.user['similar_users']
except KeyError as exc:
logger.log_error("""User with id {} doesn't
have seimilar_users key.\n {}""".format(self.user['id'], exc))
return
else:
for uid, d in similar_users.items():
sim = d['similarity']
# productions that exist in User product but not in similar
# user with 'uid' user id.
diff = d['diff']
user = next(u for u in all_users if u['id'] == uid)
# todo: user_products should be merge with pre_analyzed products in order
# to have the similar products too
user_products = user['products']
for product in user_products:
aff = product['affinity']
product = next(p for p in self.all_products
if p['id'] == product['id'])
similarity = self.independent_product_similarity(
self.user, aff, product, sim, diff)
self.user_profile['user_similarity']['level_1'][
product['id']] = similarity
for pid, d in product['sim_products'].items():
sim_ = d['similarity']
self.user_profile['user_similarity']['level_2'][
pid] = sim_ * similarity
def find_similar_products(self, product):
all_products = self.importer.import_prouct()
try:
sim_products = next(p['similar_products'] for p in all_products
if p['id'] == product['id'])
except Exception as exc:
logger.log_error(exc)
else:
return sim_products.items()
def create_client(self):
try:
config = {
'hosts': [('127.0.0.1', 3000)]
}
client = aerospike.client(config).connect()
except Exception as e:
logger.log_error("error: {0}".format(e))
raise
else:
return client
def get_latest_products(self, user):
all_products = user['products']
for product in all_products:
try:
status_date = datetime.strptime(product['status_date'],
self.time_format)
except Exception as exc:
logger.log_error(exc)
else:
if (datetime.now() -
status_date) < timedelta(days=self.recent_date_number):
yield product
def product_similarity(self, user=None):
user = user or self.user
self.all_products = [p[2] for p in self.importer.import_product()]
# User product is contain {id, status, activity, status_date }
user_products = user['products']
for product in user_products:
try:
similar_products = next(p['sim_products'] for p in self.all_products if p['id'] == product['id'])
except StopIteration as exc:
logger.log_error("""Product with id {} Error: {}. \n""".format(product['id'], exc))
else:
for aff, pid in self.cal_similar_product_affinity(product, similar_products):
self.user_profile['product_similarity'][pid] = aff