def get_recommend(request):
result_list = list()
if 1 == 1:
#判斷是否登入，沒有登入則return not login
if request.user.is_authenticated():
user_id = request.user.id
if user_id == 1:
result_list = [{'result': 'no jimmy'}]
return HttpResponse(json.dumps(result_list))
else:
result_list = [{'result': 'notlogin'}]
return HttpResponse(json.dumps(result_list))
#取回所有評分資料
for row in course_score.objects.all().order_by('u_id'):
temp_dict = {
'user_id': row.u_id,
'course_id': row.c_id.id,
'score': row.cs_score,
'comment': row.cs_comment
}
result_list.append(temp_dict)
#將評分資料做成crab格式
crabdata = getCrabFormat(result_list)
# return HttpResponse((result_list))
#推薦系統
model = MatrixPreferenceDataModel(crabdata)
similarity = UserSimilarity(model, pearson_correlation)
recommender = UserBasedRecommender(model,
similarity,
with_preference=True)
recommend_list = recommender.recommend(user_id)
# return HttpResponse((recommend_list))
recommend_list = [
list(recommend_list[i]) for i in range(0, len(recommend_list))
]
#推薦後資料加上課程名稱、課程資訊...
result_list = list()
for i in range(0, len(recommend_list)):
for course_row in course.objects.filter(id=recommend_list[i][0]):
tem_dict = {
'name': course_row.c_name,
'teacher': course_row.c_teacher,
'credit': course_row.raw_course_set.all()[0].rc_credit,
'depart': course_row.raw_course_set.all()[0].rc_department,
'semester': course_row.raw_course_set.all()[0].rc_semester,
'c_id': recommend_list[i][0],
'raw_cid': course_row.raw_course_set.all()[0].id,
'score': recommend_list[i][1]
}
result_list.append(tem_dict)
return HttpResponse(json.dumps(result_list))
else:
result_list = [{'result': 'error'}]
return HttpResponse(json.dumps(result_list))
def recom(i):
try:
M = pd.read_pickle(path + 'DA_Rating.df')
user = M.ix[:, i]
user.name
usernnz = user > 0
usernnzIDX = np.where(usernnz)
targets = user[usernnz].index.values
N = M.copy()
N.ix[:, i] = 0
idx = np.random.random_integers(
0, len(usernnzIDX[0]), min(len(usernnzIDX[0]) - 3, numFeedbacks))
N.ix[idx, i] = user.iloc[idx]
model = MatrixPreferenceDataModel(getRecommenderData(N))
similarity = UserSimilarity(model, cosine_distances, 3)
recommender = UserBasedRecommender(model,
similarity,
with_preference=True)
rec = recommender.recommend(user.name, how_many=100)
ranking = map(lambda x: x[0], rec)
ap, mrr = AP(ranking, targets), MRR(ranking, targets)
pd.to_pickle((ap, mrr),
outpath + 'numFB{}i{}.pkl'.format(numFeedbacks, i))
except:
pass
def custom_recommend(dataset, recommend_to, num_of_recommendations = 10): #This is based on the USER-BASED RECOMMENDATION Model #Build the model. It returns a dictionary of the recommendations model = MatrixPreferenceDataModel(dataset) similarity = UserSimilarity(model, euclidean_distances) #Build the Recommender recommender = UserBasedRecommender(model, similarity, with_preference = True) return recommender.recommend(recommend_to, num_of_recommendations)
def getRecommender(dataFile):
from scikits.crab.models.classes import MatrixPreferenceDataModel
model = MatrixPreferenceDataModel(loadData(dataFile))
print model[0]
from scikits.crab.metrics import pearson_correlation
from scikits.crab.similarities import UserSimilarity
similarity = UserSimilarity(model, pearson_correlation)
from scikits.crab.recommenders.knn import UserBasedRecommender
recommender = UserBasedRecommender(model, similarity, with_preference=True)
a = 5
print "For user %d we recommend movie %d" % (a, recommender.recommend(5))
return recommender
def generate_recomendations(model):
from scikits.crab.metrics import pearson_correlation
from scikits.crab.similarities import UserSimilarity
#Build the similarity
similarity = UserSimilarity(model, pearson_correlation)
from sklearn.base import BaseEstimator
from scikits.crab.recommenders.knn import UserBasedRecommender
#build the user Based recommender
recommender = UserBasedRecommender(model, similarity, with_preference=True)
#recommend item for the user 5 (Toby)
recomendations = recommender.recommend(5)
return recomendations
def api_import1():
movies = datasets.load_sample_movies()
import pprint ## to make printed items clearer
pprint.pprint(movies.data)
pprint.pprint(movies.user_ids)
pprint.pprint(movies.item_ids)
from scikits.crab.models import MatrixPreferenceDataModel
#Build the model
model = MatrixPreferenceDataModel(movies.data)
from scikits.crab.metrics import pearson_correlation
from scikits.crab.similarities import UserSimilarity
#Build the similarity
similarity = UserSimilarity(model, pearson_correlation)
from sklearn.base import BaseEstimator
from scikits.crab.recommenders.knn import UserBasedRecommender
#build the user Based recommender
recommender = UserBasedRecommender(model, similarity, with_preference=True)
#recommend item for the user 5 (Toby)
recomendations = recommender.recommend(5)
pprint.pprint(recomendations)
return 'List of ' + url_for('api_articles')
def user_base(input_file, output_file, data_file):
# 基础数据-测试数据
from scikits.crab import datasets
# movies = datasets.load_sample_movies()
user_name = read_user_name(input_file)
shopping_history = load_test_data(data_file)
user_order_num = userName_to_userOrderNum(data_file, user_name)
#Build the model
from scikits.crab.models import MatrixPreferenceDataModel
model = MatrixPreferenceDataModel(shopping_history.data)
#Build the similarity
# 选用算法 pearson_correlation
# from scikits.crab.metrics import pearson_correlation # need score
from scikits.crab.metrics import cosine_distances # DO NOT need score
from scikits.crab.similarities import UserSimilarity
similarity = UserSimilarity(model, cosine_distances)
# 选择 基于User的推荐
from scikits.crab.recommenders.knn import UserBasedRecommender
recommender = UserBasedRecommender(model, similarity, with_preference=True)
ret = recommender.recommend(
user_order_num) # 输出个结果看看效果 Recommend items for the user 5 (Toby)
if ret:
# 所有推荐结果都保存到文件，交给服务器处理
f_w = open(output_file, 'w')
for i in ret:
product_order_num = i[0]
product_score = i[1]
product_name = productOrderNum_to_productName(
data_file, product_order_num)
f_w.write(str(product_name) + ',' + str(product_score) + '\n')
from scikits.crab import datasets movies = datasets.load_sample_movies() songs = datasets.load_sample_songs() print movies.data print movies.user_ids print movies.item_ids from scikits.crab.models import MatrixPreferenceDataModel #Build the model model = MatrixPreferenceDataModel(movies.data) from scikits.crab.metrics import pearson_correlation from scikits.crab.similarities import UserSimilarity #Build the similarity similarity = UserSimilarity(model, pearson_correlation) print similarity[1] from scikits.crab.metrics.pairwise import euclidean_distances similarity = UserSimilarity(model, euclidean_distances) print similarity[5] from scikits.crab.recommenders.knn import UserBasedRecommender #Build the User based recommender recommender = UserBasedRecommender(model, similarity, with_preference=True) #Recommend items for the user 5 (Toby) recommender.recommend(5)
def recommender(request):
freelancer = {"user_ids": {}, 'data': {}, 'item_ids': {}}
for user in User.objects.all():
freelancer['user_ids'][user.id] = user.username
for user in User.objects.all():
freelancer['item_ids'][user.id] = user.username
test_item = {"ios": 1, "ui": 2, "android": 3, "website": 4}
for user in User.objects.all():
freelancer['data'][user.id] = {}
for project in Project.objects.all():
if project.user_id.username == project.user_id.id:
freelancer['data'][user.id][test_item[proj_type]] = 4
break
for id, item in test_item.items():
freelancer['data'][user.id][item] = random.randint(1, 4)
print freelancer['data']
freelancer['data'] = {
1: {
1: 3.0,
2: 4.0,
3: 3.5,
4: 5.0,
5: 3.0
},
2: {
1: 3.0,
2: 4.0,
3: 2.0,
5: 3.0,
6: 2.0
},
3: {
2: 3.5,
3: 2.5,
4: 4.0,
5: 4.5,
6: 3.0
},
4: {
1: 2.5,
2: 3.5,
3: 2.5,
4: 3.5,
5: 3.0,
6: 3.0
},
5: {
2: 4.5,
3: 1.0,
4: 4.0
},
6: {
1: 3.0,
2: 3.5,
3: 3.5,
4: 5.0,
5: 3.0,
6: 1.5
},
7: {
1: 2.5,
4: 3.5,
5: 4.0
}
}
model = MatrixPreferenceDataModel(freelancer['data'])
similarity = UserSimilarity(model, pearson_correlation)
recommender = UserBasedRecommender(model, similarity, with_preference=True)
print freelancer['data']
print recommender.recommend(request.user.id)
return JsonResponse({
"status": True,
"data": recommender.recommend(request.user.id)
})
#recommend_top_5_item = recsys_item.recommended_because(new_active_user_id,42,how_many=5)
recommend_list_item = recsys_item.recommend(new_active_user_id, how_many=5)
#print("Item : " +recommend_list_to_json(recommend_list_item))
#evaluator = CfEvaluator()
#test_item_a = evaluator.evaluate_on_split(recsys_item,at=4, sampling_ratings=0.5,permutation=False,cv=5)
#pprint(test_item_a)
#elapsed = timeit.default_timer() - start_time
#print elapsed
#start_time = timeit.default_timer()
myDataset_course = create_finally_dataset(150, active_user, student_ID)
#pprint(myDataset_course)
new_active_user_id = find_new_user_id(myDataset_course, str(student_ID))
model = MatrixPreferenceDataModel(myDataset_course['data'])
similarity_user = UserSimilarity(model, cosine_distances)
neighborhood_user = NearestNeighborsStrategy()
recsys_user = UserBasedRecommender(model,
similarity_user,
neighborhood_user,
with_preference=True)
recommend_list_user = recsys_user.recommend(new_active_user_id, how_many=5)
#elapsed = timeit.default_timer() - start_time
#print elapsed
print recommend_list_to_json(
recommend_list_item, myDataset_course,
type="ITEM") + recommend_list_to_json(
recommend_list_user, myDataset_course, type="USER")
#evaluator = CfEvaluator()
#test_user_a = evaluator.evaluate_on_split(recsys_user,at=4,sampling_ratings=0.7,permutation=False,cv=5)
#pprint(test_user_a)
'You, Me and Dupree': 3.5
},
'Penny Frewman': {
'Snakes on a Plane': 4.5,
'You, Me and Dupree': 1.0,
'Superman Returns': 4.0
},
'Maria Gabriela': {}
}
model = MatrixPreferenceDataModel(movies)
boolean_model = MatrixBooleanPrefDataModel(movies)
similarity = UserSimilarity(model, euclidean_distances)
boolean_similarity = UserSimilarity(boolean_model, jaccard_coefficient)
neighborhood = NearestNeighborsStrategy()
recsys = UserBasedRecommender(model, similarity, neighborhood)
boolean_recsys = UserBasedRecommender(boolean_model, boolean_similarity,
neighborhood)
def test_root_CfEvaluator_evaluate():
"""Check evaluate method in CfEvaluator """
evaluator = CfEvaluator()
#Test with invalid metric
assert_raises(ValueError, evaluator.evaluate, recsys, 'rank')
#Test with specified metric
rmse = evaluator.evaluate(recsys, 'rmse', permutation=False)
assert_true(rmse['rmse'] >= 0.0 and rmse['rmse'] <= 1.0)
