def make_feature_factory_manager(split_num, model_id=None):
logger = get_logger()
feature_factory_dict = {}
for column in ["user_id", "content_id"]:
is_partial_fit = (column == "content_id" or column == "user_id")
if type(column) == str:
feature_factory_dict[column] = {
"TargetEncoder":
TargetEncoder(column=column, is_partial_fit=is_partial_fit)
}
else:
feature_factory_dict[column] = {
"TargetEncoder":
TargetEncoder(column=list(column),
is_partial_fit=is_partial_fit)
}
feature_factory_dict["user_id"][
"ShiftDiffEncoderTimestamp"] = ShiftDiffEncoder(groupby="user_id",
column="timestamp",
is_partial_fit=True)
feature_factory_dict["user_id"][
"PastNTimestampEncoder"] = PastNFeatureEncoder(column="timestamp",
past_ns=[5, 20],
agg_funcs=["vslast"],
remove_now=False)
feature_factory_dict["user_id"][
"Past1ContentTypeId"] = PastNFeatureEncoder(column="content_type_id",
past_ns=[5, 15],
agg_funcs=["mean"],
remove_now=False)
feature_factory_dict["user_id"]["StudyTermEncoder"] = StudyTermEncoder(
is_partial_fit=True)
feature_factory_dict["user_id"][
"ElapsedTimeVsShiftDiffEncoder"] = ElapsedTimeVsShiftDiffEncoder()
feature_factory_dict["user_id"]["CountEncoder"] = CountEncoder(
column="user_id", is_partial_fit=True)
feature_factory_dict["user_id"][
"UserAnswerLevelEncoder"] = UserAnswerLevelEncoder(past_n=50)
feature_factory_dict[("user_id", "part")] = {
"UserContentRateEncoder":
UserContentRateEncoder(column=["user_id", "part"], rate_func="elo")
}
for column in ["user_id", "content_id", "part", ("user_id", "part")]:
if column not in feature_factory_dict:
feature_factory_dict[column] = {}
if type(column) == str:
feature_factory_dict[column][
f"MeanAggregatorShiftDiffTimeElapsedTimeby{column}"] = MeanAggregator(
column=column,
agg_column="shiftdiff_timestamp_by_user_id_cap200k",
remove_now=False)
feature_factory_dict[column][
f"MeanAggregatorStudyTimeby{column}"] = MeanAggregator(
column=column, agg_column="study_time", remove_now=False)
else:
feature_factory_dict[column][
f"MeanAggregatorShiftDiffTimeElapsedTimeby{column}"] = MeanAggregator(
column=list(column),
agg_column="shiftdiff_timestamp_by_user_id_cap200k",
remove_now=False)
feature_factory_dict[column][
f"MeanAggregatorStudyTimeby{column}"] = MeanAggregator(
column=list(column),
agg_column="study_time",
remove_now=False)
feature_factory_dict["user_id"][
"CategoryLevelEncoderPart"] = CategoryLevelEncoder(
groupby_column="user_id", agg_column="part", categories=[2, 5])
feature_factory_dict["user_id"]["PreviousAnswer2"] = PreviousAnswer2(
groupby="user_id",
column="content_id",
is_debug=is_debug,
model_id=model_id,
n=300)
feature_factory_dict["user_id"][
"PreviousNAnsweredCorrectly"] = PreviousNAnsweredCorrectly(
n=5, is_partial_fit=True)
feature_factory_dict[f"previous_5_ans"] = {
"TargetEncoder": TargetEncoder(column="previous_5_ans")
}
feature_factory_dict["user_id"][
"QuestionLectureTableEncoder2"] = QuestionLectureTableEncoder2(
model_id=model_id, is_debug=is_debug, past_n=100, min_size=300)
feature_factory_dict["user_id"][
"QuestionQuestionTableEncoder3"] = QuestionQuestionTableEncoder2(
model_id=model_id, is_debug=is_debug, past_n=100, min_size=300)
feature_factory_dict["user_id"][
"UserContentRateEncoder"] = UserContentRateEncoder(column="user_id",
rate_func="elo")
feature_factory_dict["user_id"][
"PreviousContentAnswerTargetEncoder"] = PreviousContentAnswerTargetEncoder(
min_size=300)
feature_factory_dict["post"] = {
"ContentIdTargetEncoderAggregator": TargetEncoderAggregator()
}
feature_factory_manager = FeatureFactoryManager(
feature_factory_dict=feature_factory_dict,
logger=logger,
split_num=split_num,
model_id=model_id,
load_feature=not is_debug,
save_feature=not is_debug)
return feature_factory_manager
def run(debug, model_dir, kaggle=False):
if kaggle:
files_dir = "/kaggle/input/riiid-split10/*.pickle"
else:
files_dir = "../input/riiid-test-answer-prediction/split10_base/*.pickle"
logger = get_logger()
# environment
env = riiideducation.make_env()
df_question = pd.read_csv(
"../input/riiid-test-answer-prediction/questions.csv",
dtype={
"bundle_id": "int32",
"question_id": "int32",
"correct_answer": "int8",
"part": "int8"
})
df_lecture = pd.read_csv(
"../input/riiid-test-answer-prediction/lectures.csv",
dtype={
"lecture_id": "int32",
"tag": "int16",
"part": "int8"
})
# model loading
models = []
for model_path in glob.glob(f"{model_dir}/*model*.pickle"):
with open(model_path, "rb") as f:
models.append(pickle.load(f))
# data preprocessing
logger = get_logger()
feature_factory_dict = {}
for column in [
"user_id", "content_id", "content_type_id",
"prior_question_had_explanation", "part"
]:
feature_factory_dict[column] = {
"CountEncoder": CountEncoder(column=column),
"TargetEncoder": TargetEncoder(column=column)
}
feature_factory_dict["user_id"][
"MeanAggregatorTimestamp"] = MeanAggregator(column="user_id",
agg_column="timestamp",
remove_now=False)
feature_factory_dict["user_id"][
"MeanAggregatorPriorQuestionElapsedTime"] = MeanAggregator(
column="user_id",
agg_column="prior_question_elapsed_time",
remove_now=True)
feature_factory_dict["user_id"][
"NUniqueEncoderContentId"] = NUniqueEncoder(groupby="user_id",
column="content_id")
feature_factory_dict["user_id"][
"NUniqueEncoderTaskContainerId"] = NUniqueEncoder(
groupby="user_id", column="task_container_id")
feature_factory_dict["user_id"]["ShiftDiffEncoder"] = ShiftDiffEncoder(
groupby="user_id", column="timestamp")
feature_factory_dict["content_id"][
"MeanAggregatorPriorQuestionElapsedTime"] = MeanAggregator(
column="content_id",
agg_column="prior_question_elapsed_time",
remove_now=True)
for column in [("user_id", "content_type_id"),
("user_id", "prior_question_had_explanation"),
("user_id", "tag"), ("user_id", "part"),
("content_type_id", "part")]:
feature_factory_dict[column] = {
"CountEncoder": CountEncoder(column=list(column)),
"TargetEncoder": TargetEncoder(column=list(column))
}
feature_factory_manager = FeatureFactoryManager(
feature_factory_dict=feature_factory_dict, logger=logger)
for model_id, fname in enumerate(glob.glob(files_dir)):
logger.info(f"loading... {fname}")
df = pd.read_pickle(fname)
df["prior_question_had_explanation"] = df[
"prior_question_had_explanation"].astype("float16").fillna(
-1).astype("int8")
if debug:
df = df.head(1000)
df = pd.concat([
pd.merge(df[df["content_type_id"] == 0],
df_question,
how="left",
left_on="content_id",
right_on="question_id"),
pd.merge(df[df["content_type_id"] == 1],
df_lecture,
how="left",
left_on="content_id",
right_on="lecture_id")
])
logger.info(df.shape)
feature_factory_manager.fit(df)
logger.info(df.shape)
del df
gc.collect()
iter_test = env.iter_test()
df_test_prev = pd.DataFrame()
answered_correctlies = []
user_answers = []
i = 0
t = time.time()
for (df_test, df_sample_prediction) in iter_test:
i += 1
logger.info(
f"[time: {int(time.time() - t)}iteration {i}: data_length: {len(df_test)}"
)
# 前回のデータ更新
if len(df_test_prev) > 0: # 初回のみパスするためのif
answered_correctly = df_test.iloc[0]["prior_group_answers_correct"]
user_answer = df_test.iloc[0]["prior_group_responses"]
answered_correctlies.extend([
int(x) for x in answered_correctly.replace("[", "").replace(
"'", "").replace("]", "").replace(" ", "").split(",")
])
user_answers.extend([
int(x)
for x in user_answer.replace("[", "").replace("'", "").replace(
"]", "").replace(" ", "").split(",")
])
if debug:
update_record = 1
else:
update_record = 50
if len(df_test_prev) > update_record:
df_test_prev["answered_correctly"] = answered_correctlies
df_test_prev["user_answer"] = user_answers
# df_test_prev = df_test_prev.drop(prior_columns, axis=1)
feature_factory_manager.fit(df_test_prev)
df_test_prev = pd.DataFrame()
answered_correctlies = []
user_answers = []
# 今回のデータ取得&計算
# logger.info(f"[time: {int(time.time() - t)}dataload")
logger.info(f"merge... ")
w_df1 = pd.merge(df_test[df_test["content_type_id"] == 0],
df_question,
how="left",
left_on="content_id",
right_on="question_id")
w_df2 = pd.merge(df_test[df_test["content_type_id"] == 1],
df_lecture,
how="left",
left_on="content_id",
right_on="lecture_id")
df_test = pd.concat([w_df1, w_df2])
df_test["tag"] = df_test["tag"].fillna(-1)
df_test["correct_answer"] = df_test["correct_answer"].fillna(-1)
df_test["bundle_id"] = df_test["bundle_id"].fillna(-1)
logger.info(f"transform... ")
df_test["prior_question_had_explanation"] = df_test[
"prior_question_had_explanation"].astype("float16").fillna(
-1).astype("int8")
df = feature_factory_manager.partial_predict(df_test)
df.columns = [x.replace(" ", "_") for x in df.columns]
logger.info(f"other... ")
# predict
predicts = []
cols = models[0].feature_name()
for model in models:
predicts.append(model.predict(df[cols]))
df["answered_correctly"] = np.array(predicts).transpose().mean(axis=1)
df_sample_prediction = pd.merge(df_sample_prediction[["row_id"]],
df[["row_id", "answered_correctly"]],
how="inner")
env.predict(df_sample_prediction)
df_test_prev = df_test_prev.append(df[cols + ["user_id"]])
if debug:
df_test_prev.to_csv(f"{i}.csv")
def make_feature_factory_manager(split_num, model_id=None):
logger = get_logger()
feature_factory_dict = {}
feature_factory_dict["tags"] = {
"TagsSeparator": TagsSeparator(is_partial_fit=True)
}
for column in ["user_id", "content_id"]:
is_partial_fit = (column == "content_id" or column == "user_id")
if type(column) == str:
feature_factory_dict[column] = {
"TargetEncoder": TargetEncoder(column=column, is_partial_fit=is_partial_fit)
}
else:
feature_factory_dict[column] = {
"TargetEncoder": TargetEncoder(column=list(column), is_partial_fit=is_partial_fit)
}
feature_factory_dict["user_id"]["ShiftDiffEncoderTimestamp"] = ShiftDiffEncoder(groupby="user_id",
column="timestamp")
for column in ["user_id", "content_id"]:
feature_factory_dict[column][f"MeanAggregatorPriorQuestionElapsedTimeby{column}"] = MeanAggregator(column=column,
agg_column="prior_question_elapsed_time",
remove_now=True)
feature_factory_dict["user_id"]["UserLevelEncoder2ContentId"] = UserLevelEncoder2(vs_column="content_id")
feature_factory_dict["content_id"]["ContentLevelEncoder2UserId"] = ContentLevelEncoder(vs_column="user_id", is_partial_fit=True)
feature_factory_dict["user_id"]["MeanAggregatorContentLevel"] = MeanAggregator(column="user_id",
agg_column="content_level_user_id",
remove_now=False)
feature_factory_dict["user_id"]["CountEncoder"] = CountEncoder(column="user_id", is_partial_fit=True)
feature_factory_dict["user_id"]["UserCountBinningEncoder"] = UserCountBinningEncoder(is_partial_fit=True)
feature_factory_dict["user_count_bin"] = {}
feature_factory_dict["user_count_bin"]["TargetEncoder"] = TargetEncoder(column="user_count_bin")
feature_factory_dict[("user_id", "user_count_bin")] = {
"TargetEncoder": TargetEncoder(column=["user_id", "user_count_bin"])
}
feature_factory_dict[("content_id", "user_count_bin")] = {
"TargetEncoder": TargetEncoder(column=["content_id", "user_count_bin"])
}
feature_factory_dict["user_id"]["CategoryLevelEncoderPart"] = CategoryLevelEncoder(groupby_column="user_id",
agg_column="part",
categories=[2, 5])
feature_factory_dict["prior_question_elapsed_time"] = {
"PriorQuestionElapsedTimeBinningEncoder": PriorQuestionElapsedTimeBinningEncoder(is_partial_fit=True)
}
feature_factory_dict[("part", "prior_question_elapsed_time_bin")] = {
"TargetEncoder": TargetEncoder(column=["part", "prior_question_elapsed_time_bin"])
}
feature_factory_dict["user_id"]["PreviousAnswer2"] = PreviousAnswer2(groupby="user_id",
column="content_id",
is_debug=is_debug,
model_id=model_id,
n=500)
feature_factory_dict["user_id"]["PreviousNAnsweredCorrectly"] = PreviousNAnsweredCorrectly(n=3,
is_partial_fit=True)
feature_factory_dict[f"previous_3_ans"] = {
"TargetEncoder": TargetEncoder(column="previous_3_ans")
}
feature_factory_dict["user_id"]["QuestionLectureTableEncoder2"] = QuestionLectureTableEncoder2(model_id=model_id,
is_debug=is_debug,
past_n=100)
feature_factory_dict["user_id"]["QuestionQuestionTableEncoder"] = QuestionQuestionTableEncoder(model_id=model_id,
is_debug=is_debug,
past_n=100)
feature_factory_dict["user_id"]["UserContentRateEncoder"] = UserContentRateEncoder(column="user_id",
rate_func="elo")
feature_factory_dict[("user_id", "part")] = {
"UserContentRateEncoder": UserContentRateEncoder(column=["user_id", "part"],
rate_func="elo")
}
feature_factory_dict["post"] = {
"ContentIdTargetEncoderAggregator": TargetEncoderAggregator()
}
feature_factory_manager = FeatureFactoryManager(feature_factory_dict=feature_factory_dict,
logger=logger,
split_num=split_num,
model_id=model_id,
load_feature=not is_debug,
save_feature=not is_debug)
return feature_factory_manager
def make_feature_factory_manager(split_num, model_id=None):
logger = get_logger()
feature_factory_dict = {}
for column in ["user_id", "content_id", ("user_id", "part")]:
is_partial_fit = (column == "content_id" or column == "user_id")
if type(column) == str:
feature_factory_dict[column] = {
"TargetEncoder":
TargetEncoder(column=column, is_partial_fit=is_partial_fit)
}
else:
feature_factory_dict[column] = {
"TargetEncoder":
TargetEncoder(column=list(column),
is_partial_fit=is_partial_fit)
}
feature_factory_dict["user_id"][
"DurationPreviousContent"] = DurationPreviousContent(
is_partial_fit=True)
feature_factory_dict["user_id"][
"PastNTimestampEncoder"] = PastNFeatureEncoder(
column="timestamp",
past_ns=[2, 3, 4, 5, 6, 7, 8, 9, 10],
agg_funcs=["vslast"],
remove_now=False)
feature_factory_dict["user_id"]["StudyTermEncoder2"] = StudyTermEncoder2(
is_partial_fit=True)
feature_factory_dict["user_id"][
"ElapsedTimeMeanByContentIdEncoder"] = ElapsedTimeMeanByContentIdEncoder(
)
feature_factory_dict["user_id"]["CountEncoder"] = CountEncoder(
column="user_id", is_partial_fit=True)
feature_factory_dict[(
"user_id", "part")]["UserContentRateEncoder"] = UserContentRateEncoder(
column=["user_id", "part"], rate_func="elo")
feature_factory_dict[("user_id", "part")]["CountEncoder"] = CountEncoder(
column=["user_id", "part"], is_partial_fit=True)
feature_factory_dict["user_id"][
"PastNUserAnswerHistory"] = PastNUserAnswerHistory(past_n=2,
min_size=300)
for column in [("user_id", "prior_question_had_explanation"),
("content_id", "prior_question_had_explanation"),
("part", "prior_question_had_explanation"),
("user_id", "part", "prior_question_had_explanation")]:
if column not in feature_factory_dict:
feature_factory_dict[column] = {}
if type(column) == str:
feature_factory_dict[column][
f"MeanAggregatorShiftDiffTimeElapsedTimeby{column}"] = MeanAggregator(
column=column,
agg_column="duration_previous_content_cap100k",
remove_now=False)
feature_factory_dict[column][
f"MeanAggregatorStudyTimeby{column}"] = MeanAggregator(
column=column, agg_column="study_time", remove_now=False)
else:
feature_factory_dict[column][
f"MeanAggregatorShiftDiffTimeElapsedTimeby{column}"] = MeanAggregator(
column=list(column),
agg_column="duration_previous_content_cap100k",
remove_now=False)
feature_factory_dict[column][
f"MeanAggregatorStudyTimeby{column}"] = MeanAggregator(
column=list(column),
agg_column="study_time",
remove_now=False)
feature_factory_dict["user_id"][
"CategoryLevelEncoderPart"] = CategoryLevelEncoder(
groupby_column="user_id", agg_column="part", categories=[2, 5])
feature_factory_dict["user_id"][
"UserContentNowRateEncoder"] = UserContentNowRateEncoder(
column="part", target=[1, 2, 3, 4, 5, 6, 7], rate_func="elo")
feature_factory_dict["user_id"]["PreviousAnswer2"] = PreviousAnswer2(
groupby="user_id",
column="content_id",
is_debug=is_debug,
model_id=model_id,
n=300)
feature_factory_dict["user_id"][
"PreviousNAnsweredCorrectly"] = PreviousNAnsweredCorrectly(
n=5, is_partial_fit=True)
feature_factory_dict[f"previous_5_ans"] = {
"TargetEncoder": TargetEncoder(column="previous_5_ans")
}
feature_factory_dict["user_id"][
"QuestionLectureTableEncoder2"] = QuestionLectureTableEncoder2(
model_id=model_id, is_debug=is_debug, past_n=100, min_size=300)
feature_factory_dict["user_id"][
"QuestionQuestionTableEncoder2"] = QuestionQuestionTableEncoder2(
model_id=model_id, is_debug=is_debug, past_n=100, min_size=300)
feature_factory_dict["user_id"][
"UserContentRateEncoder"] = UserContentRateEncoder(column="user_id",
rate_func="elo")
feature_factory_dict["content_id"]["CorrectVsIncorrectMeanEncoderContent-Duration100k"] = \
CorrectVsIncorrectMeanEncoder(groupby="content_id",
column="duration_previous_content_cap100k",
min_size=300)
feature_factory_dict["content_id"]["CorrectVsIncorrectMeanEncoderContent-UserIdTargetEnc"] = \
CorrectVsIncorrectMeanEncoder(groupby="part",
column="target_enc_user_id",
min_size=300)
feature_factory_dict["user_id"][
"PreviousContentAnswerTargetEncoder"] = PreviousContentAnswerTargetEncoder(
min_size=300)
feature_factory_dict["post"] = {
"DurationFeaturePostProcess": DurationFeaturePostProcess()
}
feature_factory_manager = FeatureFactoryManager(
feature_factory_dict=feature_factory_dict,
logger=logger,
split_num=split_num,
model_id=model_id,
load_feature=not is_debug,
save_feature=not is_debug)
return feature_factory_manager
def make_feature_factory_manager(split_num):
logger = get_logger()
feature_factory_dict = {}
feature_factory_dict["tags"] = {"TagsSeparator": TagsSeparator()}
for column in [
"content_id", "user_id", "part", "prior_question_had_explanation",
"tags1", "tags2", ("user_id", "prior_question_had_explanation"),
("user_id", "part"), ("content_id", "prior_question_had_explanation")
]:
is_partial_fit = (column == "content_id" or column == "user_id")
if type(column) == str:
feature_factory_dict[column] = {
"CountEncoder":
CountEncoder(column=column, is_partial_fit=is_partial_fit),
"TargetEncoder":
TargetEncoder(column=column, is_partial_fit=is_partial_fit)
}
else:
feature_factory_dict[column] = {
"CountEncoder":
CountEncoder(column=list(column),
is_partial_fit=is_partial_fit),
"TargetEncoder":
TargetEncoder(column=list(column),
is_partial_fit=is_partial_fit)
}
feature_factory_dict["user_id"][
"ShiftDiffEncoderTimestamp"] = ShiftDiffEncoder(groupby="user_id",
column="timestamp",
is_partial_fit=True)
feature_factory_dict["user_id"][
"ShiftDiffEncoderContentId"] = ShiftDiffEncoder(groupby="user_id",
column="content_id")
for column in ["user_id", "content_id"]:
feature_factory_dict[column][
f"MeanAggregatorPriorQuestionElapsedTimeby{column}"] = MeanAggregator(
column=column,
agg_column="prior_question_elapsed_time",
remove_now=True)
feature_factory_dict["user_id"][
"UserLevelEncoder2ContentId"] = UserLevelEncoder2(
vs_column="content_id")
feature_factory_dict["user_id"][
"UserCountBinningEncoder"] = UserCountBinningEncoder(
is_partial_fit=True)
feature_factory_dict["user_count_bin"] = {}
feature_factory_dict["user_count_bin"]["CountEncoder"] = CountEncoder(
column="user_count_bin")
feature_factory_dict["user_count_bin"]["TargetEncoder"] = TargetEncoder(
column="user_count_bin")
feature_factory_dict[("user_id", "user_count_bin")] = {
"CountEncoder": CountEncoder(column=["user_id", "user_count_bin"]),
"TargetEncoder": TargetEncoder(column=["user_id", "user_count_bin"])
}
feature_factory_dict[("content_id", "user_count_bin")] = {
"CountEncoder": CountEncoder(column=["content_id", "user_count_bin"]),
"TargetEncoder": TargetEncoder(column=["content_id", "user_count_bin"])
}
feature_factory_dict[(
"prior_question_had_explanation", "user_count_bin")] = {
"CountEncoder":
CountEncoder(
column=["prior_question_had_explanation", "user_count_bin"]),
"TargetEncoder":
TargetEncoder(
column=["prior_question_had_explanation", "user_count_bin"])
}
feature_factory_dict["user_id"][
"CategoryLevelEncoderPart"] = CategoryLevelEncoder(
groupby_column="user_id", agg_column="part", categories=[2, 5])
feature_factory_dict["user_count_bin"]["CategoryLevelEncoderUserCountBin"] = \
CategoryLevelEncoder(groupby_column="user_id",
agg_column="user_count_bin",
categories=[0])
feature_factory_dict["prior_question_elapsed_time"] = {
"PriorQuestionElapsedTimeBinningEncoder":
PriorQuestionElapsedTimeBinningEncoder()
}
feature_factory_dict[("part", "prior_question_elapsed_time_bin")] = {
"CountEncoder":
CountEncoder(column=["part", "prior_question_elapsed_time_bin"]),
"TargetEncoder":
TargetEncoder(column=["part", "prior_question_elapsed_time_bin"])
}
feature_factory_dict["user_id"]["PreviousAnswer2"] = PreviousAnswer2(
groupby="user_id", column="content_id")
feature_factory_manager = FeatureFactoryManager(
feature_factory_dict=feature_factory_dict,
logger=logger,
split_num=split_num)
return feature_factory_manager
# df = pd.concat([pd.read_pickle(fname).head(500), pd.read_pickle(fname).tail(500)])
df["answered_correctly"] = df["answered_correctly"].replace(-1, np.nan)
df["prior_question_had_explanation"] = df[
"prior_question_had_explanation"].fillna(-1).astype("int8")
logger = get_logger()
feature_factory_dict = {}
feature_factory_dict["tags"] = {"TagsSeparator": TagsSeparator()}
for column in [
"user_id", "content_id", "content_type_id",
"prior_question_had_explanation", "part", "tags1", "tags2",
"tags3", "tags4", "tags5", "tags6"
]:
feature_factory_dict[column] = {
"CountEncoder": CountEncoder(column=column),
"TargetEncoder": TargetEncoder(column=column)
}
feature_factory_dict["user_id"][
"MeanAggregatorTimestamp"] = MeanAggregator(column="user_id",
agg_column="timestamp",
remove_now=False)
feature_factory_dict["user_id"][
"MeanAggregatorPriorQuestionElapsedTime"] = MeanAggregator(
column="user_id",
agg_column="prior_question_elapsed_time",
remove_now=True)
feature_factory_dict["content_id"][
"MeanAggregatorPriorQuestionElapsedTime"] = MeanAggregator(
column="content_id",
agg_column="prior_question_elapsed_time",
remove_now=True)