def test_python_errors(python_data):
rating_true, rating_pred, _ = python_data(binary_rating=False)
with pytest.raises(ValueError):
rmse(rating_true, rating_true, col_user="******")
with pytest.raises(ValueError):
mae(rating_pred,
rating_pred,
col_rating=PREDICTION_COL,
col_user="******")
with pytest.raises(ValueError):
rsquared(rating_true, rating_pred, col_item="not_item")
with pytest.raises(ValueError):
exp_var(rating_pred,
rating_pred,
col_rating=PREDICTION_COL,
col_item="not_item")
with pytest.raises(ValueError):
precision_at_k(rating_true, rating_pred, col_rating="not_rating")
with pytest.raises(ValueError):
recall_at_k(rating_true, rating_pred, col_prediction="not_prediction")
with pytest.raises(ValueError):
ndcg_at_k(rating_true, rating_true, col_user="******")
with pytest.raises(ValueError):
map_at_k(rating_pred,
rating_pred,
col_rating=PREDICTION_COL,
col_user="******")
def test_python_errors(rating_true, rating_pred):
with pytest.raises(ValueError):
rmse(rating_true, rating_true, col_user="******")
with pytest.raises(ValueError):
mae(rating_pred, rating_pred, col_rating=DEFAULT_PREDICTION_COL, col_user="******")
with pytest.raises(ValueError):
rsquared(rating_true, rating_pred, col_item="not_item")
with pytest.raises(ValueError):
exp_var(
rating_pred, rating_pred, col_rating=DEFAULT_PREDICTION_COL, col_item="not_item"
)
with pytest.raises(ValueError):
precision_at_k(rating_true, rating_pred, col_rating="not_rating")
with pytest.raises(ValueError):
recall_at_k(rating_true, rating_pred, col_prediction="not_prediction")
with pytest.raises(ValueError):
ndcg_at_k(rating_true, rating_true, col_user="******")
with pytest.raises(ValueError):
map_at_k(
rating_pred, rating_pred, col_rating=DEFAULT_PREDICTION_COL, col_user="******"
)
def test_python_errors(rating_true, rating_pred):
with pytest.raises(ValueError):
rmse(rating_true, rating_true, col_user="******")
with pytest.raises(ValueError):
mae(rating_pred,
rating_pred,
col_rating=DEFAULT_PREDICTION_COL,
col_user="******")
with pytest.raises(ValueError):
rsquared(rating_true, rating_pred, col_item="not_item")
with pytest.raises(ValueError):
exp_var(rating_pred,
rating_pred,
col_rating=DEFAULT_PREDICTION_COL,
col_item="not_item")
with pytest.raises(ValueError):
precision_at_k(rating_true, rating_pred, col_rating="not_rating")
with pytest.raises(ValueError):
recall_at_k(rating_true, rating_pred, col_prediction="not_prediction")
with pytest.raises(ValueError):
ndcg_at_k(rating_true, rating_true, col_user="******")
with pytest.raises(ValueError):
map_at_k(rating_pred,
rating_pred,
col_rating=DEFAULT_PREDICTION_COL,
col_user="******")
def test_python_ndcg_at_k(python_data, target_metrics):
rating_true, rating_pred = python_data
assert (ndcg_at_k(
k=10,
rating_true=rating_true,
rating_pred=rating_true,
col_prediction="rating",
) == 1)
assert ndcg_at_k(rating_true, rating_pred, k=10) == target_metrics["ndcg"]
def test_python_ndcg_at_k(rating_true, rating_pred, rating_nohit):
assert (ndcg_at_k(
rating_true=rating_true,
rating_pred=rating_true,
col_prediction=DEFAULT_RATING_COL,
k=10,
) == 1)
assert ndcg_at_k(rating_true, rating_nohit, k=10) == 0.0
assert ndcg_at_k(rating_true, rating_pred,
k=10) == pytest.approx(0.38172, TOL)
def test_python_ndcg_at_k(python_data, target_metrics):
rating_true, rating_pred, rating_nohit = python_data(binary_rating=False)
assert ndcg_at_k(
k=10,
rating_true=rating_true,
rating_pred=rating_true,
col_prediction=DEFAULT_RATING_COL,
) == 1
assert ndcg_at_k(rating_true, rating_nohit, k=10) == 0.0
assert ndcg_at_k(rating_true, rating_pred, k=10) == target_metrics["ndcg"]
def test_python_ndcg_at_k(rating_true, rating_pred, rating_nohit):
assert (
ndcg_at_k(
rating_true=rating_true,
rating_pred=rating_true,
col_prediction=DEFAULT_RATING_COL,
k=10,
)
== 1
)
assert ndcg_at_k(rating_true, rating_nohit, k=10) == 0.0
assert ndcg_at_k(rating_true, rating_pred, k=10) == pytest.approx(0.38172, TOL)
def on_epoch_end(self, batch, logs={}):
"""At the end of each epoch calculate NDCG@k of the validation set.
If the model performance is improved, the model weights are saved.
Update the list of validation NDCG@k by adding obtained value."""
# recommend top k items based on training part of validation set
top_k = self.recommend_k_items(x=self.val_tr,
k=self.k,
remove_seen=True
)
# convert recommendations from sparse matrix to dataframe
top_k_df = self.mapper.map_back_sparse(top_k, kind='prediction')
test_df = self.mapper.map_back_sparse(self.val_te, kind='ratings')
# calculate NDCG@k
NDCG = ndcg_at_k(test_df, top_k_df, col_prediction='prediction', k=self.k)
# check if there is an improvement in NDCG, if so, update the weights of the saved model
if NDCG > self.best_ndcg:
self.best_ndcg = NDCG
# save the weights of the optimal model
if self.save_path is not None:
self.model.save(self.save_path)
self._data.append(NDCG)
def ranking_metrics_python(test, predictions, k=DEFAULT_K):
return {
"MAP": map_at_k(test, predictions, k=k, **COL_DICT),
"nDCG@k": ndcg_at_k(test, predictions, k=k, **COL_DICT),
"Precision@k": precision_at_k(test, predictions, k=k, **COL_DICT),
"Recall@k": recall_at_k(test, predictions, k=k, **COL_DICT),
}
def ranking_metrics_python(test, predictions, k=DEFAULT_K):
return {
"MAP": map_at_k(test, predictions, k=k, **COL_DICT),
"nDCG@k": ndcg_at_k(test, predictions, k=k, **COL_DICT),
"Precision@k": precision_at_k(test, predictions, k=k, **COL_DICT),
"Recall@k": recall_at_k(test, predictions, k=k, **COL_DICT)
}
def ranking_metrics(data_size, data_true, data_pred, time_train, time_test, K):
eval_map = map_at_k(data_true,
data_pred,
col_user="******",
col_item="MovieID",
col_rating="Rating",
col_prediction="prediction",
relevancy_method="top_k",
k=K)
eval_ndcg = ndcg_at_k(data_true,
data_pred,
col_user="******",
col_item="MovieID",
col_rating="Rating",
col_prediction="prediction",
relevancy_method="top_k",
k=K)
eval_precision = precision_at_k(data_true,
data_pred,
col_user="******",
col_item="MovieID",
col_rating="Rating",
col_prediction="prediction",
relevancy_method="top_k",
k=K)
eval_recall = recall_at_k(data_true,
data_pred,
col_user="******",
col_item="MovieID",
col_rating="Rating",
col_prediction="prediction",
relevancy_method="top_k",
k=K)
df_result = pd.DataFrame(
{
"Dataset": data_size,
"K": TOPK,
"MAP": eval_map,
"nDCG@k": eval_ndcg,
"Precision@k": eval_precision,
"Recall@k": eval_recall,
"Train time (s)": time_train,
"Test time (s)": time_test
},
index=[0])
return df_result
def test_predict_ranking(rating_true):
train_set = cornac.data.Dataset.from_uir(rating_true.itertuples(index=False), seed=42)
bpr = cornac.models.BPR(k=100, max_iter=10000, seed=42).fit(train_set)
preds = predict_ranking(bpr, rating_true, remove_seen=False)
n_users = len(rating_true["userID"].unique())
n_items = len(rating_true["itemID"].unique())
assert preds.shape[0] == n_users * n_items
assert set(preds.columns) == {"userID", "itemID", "prediction"}
assert preds["userID"].dtypes == rating_true["userID"].dtypes
assert preds["itemID"].dtypes == rating_true["itemID"].dtypes
# perfect ranking achieved
assert 1e-10 > 1 - ndcg_at_k(rating_true, preds)
assert 1e-10 > 1 - recall_at_k(rating_true, preds)
def run_eval(self):
"""Run evaluation on self.data.test.
Returns:
dict: Results of all metrics in self.metrics.
"""
topk_scores = self.recommend_k_items(self.data.test,
top_k=self.top_k,
use_id=True)
ret = []
for metric in self.metrics:
if metric == "map":
ret.append(
map_at_k(self.data.test,
topk_scores,
relevancy_method=None,
k=self.top_k))
elif metric == "ndcg":
ret.append(
ndcg_at_k(self.data.test,
topk_scores,
relevancy_method=None,
k=self.top_k))
elif metric == "precision":
ret.append(
precision_at_k(self.data.test,
topk_scores,
relevancy_method=None,
k=self.top_k))
elif metric == "recall":
ret.append(
recall_at_k(self.data.test,
topk_scores,
relevancy_method=None,
k=self.top_k))
return ret
top_k['UserId'] = pd.to_numeric(top_k['UserId'])
top_k['MovieId'] = pd.to_numeric(top_k['MovieId'])
# evaluate
eval_map = map_at_k(test,
top_k,
col_user="******",
col_item="MovieId",
col_rating="Rating",
col_prediction="prediction",
relevancy_method="top_k",
k=args.top_k)
eval_ndcg = ndcg_at_k(test,
top_k,
col_user="******",
col_item="MovieId",
col_rating="Rating",
col_prediction="prediction",
relevancy_method="top_k",
k=args.top_k)
eval_precision = precision_at_k(test,
top_k,
col_user="******",
col_item="MovieId",
col_rating="Rating",
col_prediction="prediction",
relevancy_method="top_k",
k=args.top_k)
eval_recall = recall_at_k(test,
top_k,
col_user="******",
col_item="MovieId",
def test_spark_python_match(python_data, spark):
# Test on the original data with k = 10.
df_true, df_pred = python_data
dfs_true = spark.createDataFrame(df_true)
dfs_pred = spark.createDataFrame(df_pred)
eval_spark1 = SparkRankingEvaluation(dfs_true, dfs_pred, k=10)
match1 = [
recall_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark1.recall_at_k(), TOL),
precision_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark1.precision_at_k(),
TOL),
ndcg_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark1.ndcg_at_k(), TOL),
map_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark1.map_at_k(), TOL),
]
assert all(match1)
# Test on the original data with k = 3.
dfs_true = spark.createDataFrame(df_true)
dfs_pred = spark.createDataFrame(df_pred)
eval_spark2 = SparkRankingEvaluation(dfs_true, dfs_pred, k=3)
match2 = [
recall_at_k(df_true, df_pred,
k=3) == pytest.approx(eval_spark2.recall_at_k(), TOL),
precision_at_k(df_true, df_pred,
k=3) == pytest.approx(eval_spark2.precision_at_k(),
TOL),
ndcg_at_k(df_true, df_pred,
k=3) == pytest.approx(eval_spark2.ndcg_at_k(), TOL),
map_at_k(df_true, df_pred,
k=3) == pytest.approx(eval_spark2.map_at_k(), TOL),
]
assert all(match2)
# Remove the first row from the original data.
df_pred = df_pred[1:-1]
dfs_true = spark.createDataFrame(df_true)
dfs_pred = spark.createDataFrame(df_pred)
eval_spark3 = SparkRankingEvaluation(dfs_true, dfs_pred, k=10)
match3 = [
recall_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark3.recall_at_k(), TOL),
precision_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark3.precision_at_k(),
TOL),
ndcg_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark3.ndcg_at_k(), TOL),
map_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark3.map_at_k(), TOL),
]
assert all(match3)
# Test with one user
df_pred = df_pred[df_pred["userID"] == 3]
df_true = df_true[df_true["userID"] == 3]
dfs_true = spark.createDataFrame(df_true)
dfs_pred = spark.createDataFrame(df_pred)
eval_spark4 = SparkRankingEvaluation(dfs_true, dfs_pred, k=10)
match4 = [
recall_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark4.recall_at_k(), TOL),
precision_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark4.precision_at_k(),
TOL),
ndcg_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark4.ndcg_at_k(), TOL),
map_at_k(df_true, df_pred,
k=10) == pytest.approx(eval_spark4.map_at_k(), TOL),
]
assert all(match4)
logger.debug(f"Prediction: {col_prediction}")
logger.debug(f"Relevancy: {relevancy_method}")
logger.debug(f"K: {k}")
logger.debug(f"Threshold: {threshold}")
logger.debug(f"Rating True path: {args.rating_true}")
logger.debug(f"Shape of loaded DataFrame: {rating_true.shape}")
logger.debug(f"Rating Pred path: {args.rating_pred}")
logger.debug(f"Shape of loaded DataFrame: {rating_pred.shape}")
eval_ndcg = ndcg_at_k(
rating_true,
rating_pred,
col_user=col_user,
col_item=col_item,
col_rating=col_rating,
col_prediction=col_prediction,
relevancy_method=relevancy_method,
k=k,
threshold=threshold,
)
logger.debug(f"Score: {eval_ndcg}")
# Log to AzureML dashboard
run = Run.get_context()
run.parent.log("nDCG at {}".format(k), eval_ndcg)
score_result = pd.DataFrame({"ndcg_at_k": [eval_ndcg]})
save_data_frame_to_directory(
args.score_result,
start = batch_idx * BATCH_SIZE
end = min((batch_idx + 1) * BATCH_SIZE, n_users)
batch_users = all_users[start:end]
batch_predictions = all_predictions[all_predictions["userID"].isin(
batch_users)]
batch_train = train[train["userID"].isin(batch_users)]
batch_merged = pd.merge(batch_train,
batch_predictions,
on=["userID", "itemID"],
how="outer")
batch_predictions = batch_merged[batch_merged.rating.isnull()].drop(
'rating', axis=1)
batch_test = test[test["userID"].isin(batch_users)]
# eval_map = map_at_k(batch_test, batch_predictions, col_prediction='prediction', k=TOP_K)
eval_ndcg = ndcg_at_k(batch_test,
batch_predictions,
col_prediction='prediction',
k=TOP_K)
eval_precision = precision_at_k(batch_test,
batch_predictions,
col_prediction='prediction',
k=TOP_K)
eval_recall = recall_at_k(batch_test,
batch_predictions,
col_prediction='prediction',
k=TOP_K)
ndcg.append(eval_ndcg)
hr.append(eval_precision)
recall.append(eval_recall)
del batch_train
del batch_predictions
del batch_merged
with Timer() as test_time:
top_k = model.recommend_k_items(test, remove_seen=True)
# print("Took {} seconds for prediction.".format(test_time.interval))
# top_k.head()
eval_map = map_at_k(test,
top_k,
col_user='******',
col_item='itemID',
col_rating='rating',
k=TOP_K)
eval_ndcg = ndcg_at_k(test,
top_k,
col_user='******',
col_item='itemID',
col_rating='rating',
k=TOP_K)
eval_precision = precision_at_k(test,
top_k,
col_user='******',
col_item='itemID',
col_rating='rating',
k=TOP_K)
eval_recall = recall_at_k(test,
top_k,
col_user='******',
col_item='itemID',
col_rating='rating',
k=TOP_K)
eval_rmse = rmse(test,
def test_spark_python_match(python_data, spark):
# Test on the original data with k = 10.
df_true, df_pred = python_data
dfs_true = spark.createDataFrame(df_true)
dfs_pred = spark.createDataFrame(df_pred)
eval_spark1 = SparkRankingEvaluation(dfs_true, dfs_pred, k=10)
match1 = [
recall_at_k(df_true, df_pred, k=10)
== pytest.approx(eval_spark1.recall_at_k(), TOL),
precision_at_k(df_true, df_pred, k=10)
== pytest.approx(eval_spark1.precision_at_k(), TOL),
ndcg_at_k(df_true, df_pred, k=10)
== pytest.approx(eval_spark1.ndcg_at_k(), TOL),
map_at_k(df_true, df_pred, k=10) == pytest.approx(eval_spark1.map_at_k(), TOL),
]
assert all(match1)
# Test on the original data with k = 3.
dfs_true = spark.createDataFrame(df_true)
dfs_pred = spark.createDataFrame(df_pred)
eval_spark2 = SparkRankingEvaluation(dfs_true, dfs_pred, k=3)
match2 = [
recall_at_k(df_true, df_pred, k=3)
== pytest.approx(eval_spark2.recall_at_k(), TOL),
precision_at_k(df_true, df_pred, k=3)
== pytest.approx(eval_spark2.precision_at_k(), TOL),
ndcg_at_k(df_true, df_pred, k=3) == pytest.approx(eval_spark2.ndcg_at_k(), TOL),
map_at_k(df_true, df_pred, k=3) == pytest.approx(eval_spark2.map_at_k(), TOL),
]
assert all(match2)
# Remove the first row from the original data.
df_pred = df_pred[1:-1]
dfs_true = spark.createDataFrame(df_true)
dfs_pred = spark.createDataFrame(df_pred)
eval_spark3 = SparkRankingEvaluation(dfs_true, dfs_pred, k=10)
match3 = [
recall_at_k(df_true, df_pred, k=10)
== pytest.approx(eval_spark3.recall_at_k(), TOL),
precision_at_k(df_true, df_pred, k=10)
== pytest.approx(eval_spark3.precision_at_k(), TOL),
ndcg_at_k(df_true, df_pred, k=10)
== pytest.approx(eval_spark3.ndcg_at_k(), TOL),
map_at_k(df_true, df_pred, k=10) == pytest.approx(eval_spark3.map_at_k(), TOL),
]
assert all(match3)
# Test with one user
df_pred = df_pred.loc[df_pred["userID"] == 3]
df_true = df_true.loc[df_true["userID"] == 3]
dfs_true = spark.createDataFrame(df_true)
dfs_pred = spark.createDataFrame(df_pred)
eval_spark4 = SparkRankingEvaluation(dfs_true, dfs_pred, k=10)
match4 = [
recall_at_k(df_true, df_pred, k=10)
== pytest.approx(eval_spark4.recall_at_k(), TOL),
precision_at_k(df_true, df_pred, k=10)
== pytest.approx(eval_spark4.precision_at_k(), TOL),
ndcg_at_k(df_true, df_pred, k=10)
== pytest.approx(eval_spark4.ndcg_at_k(), TOL),
map_at_k(df_true, df_pred, k=10) == pytest.approx(eval_spark4.map_at_k(), TOL),
]
assert all(match4)
top_k_scores[USER] = top_k_scores['UserId']
top_k_scores[ITEM] = top_k_scores['SnackId']
top_k_scores[PREDICTION] = top_k_scores['Prediction']
top_k_scores.head()
# st.write("Top k Scores:",top_k_scores)
data_test.head()
# st.write("Data_Test:",data_test)
eval_map = map_at_k(data_test, top_k_scores, col_user=USER, col_item=ITEM,
col_rating=RATING, col_prediction=PREDICTION,
relevancy_method="top_k", k=TOP_K)
st.write("MAP:",eval_map)
eval_ndcg = ndcg_at_k(data_test, top_k_scores, col_user=USER, col_item=ITEM,
col_rating=RATING, col_prediction=PREDICTION,
relevancy_method="top_k", k=TOP_K)
st.write("NDCG:",eval_ndcg)
eval_precision = precision_at_k(data_test, top_k_scores, col_user=USER, col_item=ITEM,
col_rating=RATING, col_prediction=PREDICTION,
relevancy_method="top_k", k=TOP_K)
st.write("Precision:",eval_precision)
eval_recall = recall_at_k(data_test, top_k_scores, col_user=USER, col_item=ITEM,
col_rating=RATING, col_prediction=PREDICTION,
relevancy_method="top_k", k=TOP_K)
st.write("Recall:",eval_recall)
print("Model:\t" + learn.__class__.__name__,
"Top K:\t%d" % TOP_K,
"MAP:\t%f" % eval_map,
"NDCG:\t%f" % eval_ndcg,
"Precision@K:\t%f" % eval_precision,
model.fit(train)
top_k = model.recommend_k_items(test, remove_seen=True)
top_k_with_titles = (top_k.join(
data[['MovieId', 'Title']].drop_duplicates().set_index('MovieId'),
on='MovieId',
how='inner').sort_values(by=['UserId', 'Prediction'], ascending=False))
args = [test, top_k]
kwargs = dict(col_user='******',
col_item='MovieId',
col_rating='Rating',
col_prediction='Prediction',
relevancy_method='top_k',
k=TOP_K)
eval_map = map_at_k(*args, **kwargs)
eval_ndcg = ndcg_at_k(*args, **kwargs)
eval_precision = precision_at_k(*args, **kwargs)
eval_recall = recall_at_k(*args, **kwargs)
print(f"Model:",
f"Top K:\t\t {TOP_K}",
f"MAP:\t\t {eval_map:f}",
f"NDCG:\t\t {eval_ndcg:f}",
f"Precision@K:\t {eval_precision:f}",
f"Recall@K:\t {eval_recall:f}",
sep='\n')
