examples/00_quick_start/nrms_MIND.ipynb
<i>Copyright (c) Recommenders contributors.</i>
<i>Licensed under the MIT License.</i>
NRMS [1] is a neural news recommendation approach with multi-head selfattention. The core of NRMS is a news encoder and a user encoder. In the newsencoder, a multi-head self-attentions is used to learn news representations from news titles by modeling the interactions between words. In the user encoder, we learn representations of users from their browsed news and use multihead self-attention to capture the relatedness between the news. Besides, we apply additive attention to learn more informative news and user representations by selecting important words and news.
For quicker training and evaluaiton, we sample MINDdemo dataset of 5k users from MIND small dataset. The MINDdemo dataset has the same file format as MINDsmall and MINDlarge. If you want to try experiments on MINDsmall and MINDlarge, please change the dowload source. Select the MIND_type parameter from ['large', 'small', 'demo'] to choose dataset.
MINDdemo_train is used for training, and MINDdemo_dev is used for evaluation. Training data and evaluation data are composed of a news file and a behaviors file. You can find more detailed data description in MIND repo
This file contains news information including newsid, category, subcatgory, news title, news abstarct, news url and entities in news title, entities in news abstarct. One simple example:
N46466 lifestyle lifestyleroyals The Brands Queen Elizabeth, Prince Charles, and Prince Philip Swear By Shop the notebooks, jackets, and more that the royals can't live without. https://www.msn.com/en-us/lifestyle/lifestyleroyals/the-brands-queen-elizabeth,-prince-charles,-and-prince-philip-swear-by/ss-AAGH0ET?ocid=chopendata [{"Label": "Prince Philip, Duke of Edinburgh", "Type": "P", "WikidataId": "Q80976", "Confidence": 1.0, "OccurrenceOffsets": [48], "SurfaceForms": ["Prince Philip"]}, {"Label": "Charles, Prince of Wales", "Type": "P", "WikidataId": "Q43274", "Confidence": 1.0, "OccurrenceOffsets": [28], "SurfaceForms": ["Prince Charles"]}, {"Label": "Elizabeth II", "Type": "P", "WikidataId": "Q9682", "Confidence": 0.97, "OccurrenceOffsets": [11], "SurfaceForms": ["Queen Elizabeth"]}] []
In general, each line in data file represents information of one piece of news:
[News ID] [Category] [Subcategory] [News Title] [News Abstrct] [News Url] [Entities in News Title] [Entities in News Abstract] ...
We generate a word_dict file to transform words in news title to word indexes, and a embedding matrix is initted from pretrained glove embeddings.
One simple example:
1 U82271 11/11/2019 3:28:58 PM N3130 N11621 N12917 N4574 N12140 N9748 N13390-0 N7180-0 N20785-0 N6937-0 N15776-0 N25810-0 N20820-0 N6885-0 N27294-0 N18835-0 N16945-0 N7410-0 N23967-0 N22679-0 N20532-0 N26651-0 N22078-0 N4098-0 N16473-0 N13841-0 N15660-0 N25787-0 N2315-0 N1615-0 N9087-0 N23880-0 N3600-0 N24479-0 N22882-0 N26308-0 N13594-0 N2220-0 N28356-0 N17083-0 N21415-0 N18671-0 N9440-0 N17759-0 N10861-0 N21830-0 N8064-0 N5675-0 N15037-0 N26154-0 N15368-1 N481-0 N3256-0 N20663-0 N23940-0 N7654-0 N10729-0 N7090-0 N23596-0 N15901-0 N16348-0 N13645-0 N8124-0 N20094-0 N27774-0 N23011-0 N14832-0 N15971-0 N27729-0 N2167-0 N11186-0 N18390-0 N21328-0 N10992-0 N20122-0 N1958-0 N2004-0 N26156-0 N17632-0 N26146-0 N17322-0 N18403-0 N17397-0 N18215-0 N14475-0 N9781-0 N17958-0 N3370-0 N1127-0 N15525-0 N12657-0 N10537-0 N18224-0
In general, each line in data file represents one instance of an impression. The format is like:
[Impression ID] [User ID] [Impression Time] [User Click History] [Impression News]
User Click History is the user historical clicked news before Impression Time. Impression News is the displayed news in an impression, which format is:
[News ID 1]-[label1] ... [News ID n]-[labeln]
Label represents whether the news is clicked by the user. All information of news in User Click History and Impression News can be found in news data file.
import os
import sys
import numpy as np
import zipfile
from tqdm import tqdm
from tempfile import TemporaryDirectory
import tensorflow as tf
tf.get_logger().setLevel('ERROR') # only show error messages
from recommenders.models.deeprec.deeprec_utils import download_deeprec_resources
from recommenders.models.newsrec.newsrec_utils import prepare_hparams
from recommenders.models.newsrec.models.nrms import NRMSModel
from recommenders.models.newsrec.io.mind_iterator import MINDIterator
from recommenders.models.newsrec.newsrec_utils import get_mind_data_set
from recommenders.utils.notebook_utils import store_metadata
print("System version: {}".format(sys.version))
print("Tensorflow version: {}".format(tf.__version__))
epochs = 5
seed = 42
batch_size = 32
# Options: demo, small, large
MIND_type = 'demo'
tmpdir = TemporaryDirectory()
data_path = tmpdir.name
train_news_file = os.path.join(data_path, 'train', r'news.tsv')
train_behaviors_file = os.path.join(data_path, 'train', r'behaviors.tsv')
valid_news_file = os.path.join(data_path, 'valid', r'news.tsv')
valid_behaviors_file = os.path.join(data_path, 'valid', r'behaviors.tsv')
wordEmb_file = os.path.join(data_path, "utils", "embedding.npy")
userDict_file = os.path.join(data_path, "utils", "uid2index.pkl")
wordDict_file = os.path.join(data_path, "utils", "word_dict.pkl")
yaml_file = os.path.join(data_path, "utils", r'nrms.yaml')
mind_url, mind_train_dataset, mind_dev_dataset, mind_utils = get_mind_data_set(MIND_type)
if not os.path.exists(train_news_file):
download_deeprec_resources(mind_url, os.path.join(data_path, 'train'), mind_train_dataset)
if not os.path.exists(valid_news_file):
download_deeprec_resources(mind_url, \
os.path.join(data_path, 'valid'), mind_dev_dataset)
if not os.path.exists(yaml_file):
download_deeprec_resources(r'https://recodatasets.z20.web.core.windows.net/newsrec/', \
os.path.join(data_path, 'utils'), mind_utils)
hparams = prepare_hparams(yaml_file,
wordEmb_file=wordEmb_file,
wordDict_file=wordDict_file,
userDict_file=userDict_file,
batch_size=batch_size,
epochs=epochs,
show_step=10)
print(hparams)
iterator = MINDIterator
model = NRMSModel(hparams, iterator, seed=seed)
print(model.run_eval(valid_news_file, valid_behaviors_file))
%%time
model.fit(train_news_file, train_behaviors_file, valid_news_file, valid_behaviors_file)
%%time
res_syn = model.run_eval(valid_news_file, valid_behaviors_file)
print(res_syn)
# Record results for tests - ignore this cell
store_metadata("group_auc", res_syn['group_auc'])
store_metadata("mean_mrr", res_syn['mean_mrr'])
store_metadata("ndcg@5", res_syn['ndcg@5'])
store_metadata("ndcg@10", res_syn['ndcg@10'])
model_path = os.path.join(data_path, "model")
os.makedirs(model_path, exist_ok=True)
model.model.save_weights(os.path.join(model_path, "nrms_ckpt"))
This code segment is used to generate the prediction.zip file, which is in the same format in MIND Competition Submission Tutorial.
Please change the MIND_type parameter to large if you want to submit your prediction to MIND Competition.
group_impr_indexes, group_labels, group_preds = model.run_fast_eval(valid_news_file, valid_behaviors_file)
with open(os.path.join(data_path, 'prediction.txt'), 'w') as f:
for impr_index, preds in tqdm(zip(group_impr_indexes, group_preds)):
impr_index += 1
pred_rank = (np.argsort(np.argsort(preds)[::-1]) + 1).tolist()
pred_rank = '[' + ','.join([str(i) for i in pred_rank]) + ']'
f.write(' '.join([str(impr_index), pred_rank])+ '\n')
f = zipfile.ZipFile(os.path.join(data_path, 'prediction.zip'), 'w', zipfile.ZIP_DEFLATED)
f.write(os.path.join(data_path, 'prediction.txt'), arcname='prediction.txt')
f.close()
[1] Wu et al. "Neural News Recommendation with Multi-Head Self-Attention." in Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP)
[2] Wu, Fangzhao, et al. "MIND: A Large-scale Dataset for News Recommendation" Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics. https://msnews.github.io/competition.html
[3] GloVe: Global Vectors for Word Representation. https://nlp.stanford.edu/projects/glove/