def test_save_and_load_big():
gb = setup_big()
save(gb, 'test.json')
gb2 = read('test.json')
assert len(gb2.students) == 50
assert len(gb2.gradeables) == 21
assert len(gb2.scores) == 20 * 50 * 20
def save(self):
if self.save_every <= 1:
persist.save(UserData.data, self.persist)
self.save_every = 3
else:
self.save_every -= 1
def test_save_and_load():
gb = setup()
save(gb, 'test.json')
gb2 = read('test.json')
assert len(gb2.students) == 2
assert len(gb2.categories) == 2
assert len(gb2.gradeables) == 3
def predict(self, papers):
"""
Generates predictions from the trained classifiers. Each binary
classifier is applied once.
Parameters
==========
papers : pd.DataFrame
papers that we want to classify. Required column:
tokens_baseline - previously tokenized title-abstract
Returns
=======
scores : pd.DataFrame
Dataframe containing the predictions generated by each model.
Each column corresponds to a review group and the values in
that column are the probabilities that each paper belong to
that review group.
"""
scores = {}
tokenized_papers = list(papers[self.tokens_col])
# get embeddings for papers
if check_persisted(f"{self.env['store_misc']}/embeddings",
f'{self.vectorizer_hash}_y', self.load_fresh):
weighted_embeddings = load(f"{self.env['store_misc']}/embeddings",
f'{self.vectorizer_hash}_y')
else:
self.embeddings_model = load_word2vec(self.env['word2vec_model'])
vec = self.vectorizer
X = vec.transform(tokenized_papers)
weighted_embeddings = np.array(self.create_embeddings(X, vec))
save(weighted_embeddings,
f"{self.env['store_misc']}/embeddings",
f'{self.vectorizer_hash}_y',
persist=True)
for model_group in tqdm(self.models, desc='Test Review Groups'):
# get the classifier
classifier = self.models[model_group]
# predictions as probabilities
y_preds = classifier.predict_proba(weighted_embeddings)
probabilities = y_preds[:, 1]
# store scores of model
scores[model_group] = probabilities
scores = pd.DataFrame.from_dict(scores)
return scores
def update_settings():
persist.settings['redId'] = sensors[0].sensor_id
persist.settings['blueId'] = sensors[1].sensor_id
persist.settings['greenId'] = sensors[2].sensor_id
persist.settings['setpointC'] = controller.setpoint
persist.settings['logEnabled'] = logging_enabled
persist.settings['controlEnabled'] = controller.enabled
persist.settings['mode'] = mode
persist.settings['sg'] = specific_gravity
persist.settings['fermentStart'] = ferment_start_time
persist.save(SETTINGS_FILE)
def train_best_models(keys, X_train, y_train, best_models, prod_config,
local_paths):
"""
Train and store model objects for each review group.
Parameters
==========
X_train : DataFrame
Training features
y_train : DataFrame
Training labels
best_models : dict
Dictionary where key=review group and value=dictionary with best algorithm
and hyperparameters for that group and specified minimum recall value.
prod_config : dict
Config file for production pipeline. Includes recall values for each group and
features to pull into training data.
local_paths : dict
Local directory paths, used to store models for production.
keys: list of key values to subset best models by
Returns
=======
None
"""
# subset best models
best_models = dict((k, best_models[k]) for k in (keys))
# Loop through review groups and train model on all data
#for review_group, params in tqdm(best_models.items(), desc='Training Review Group Production Models'):
for review_group, params in best_models.items():
print(f'training {review_group}')
classifier = select_classifier(
classifier_name=params['algorithm'],
fold_hash='prod',
target=None,
classes=list(prod_config['classes']),
model_parts={},
hyperparameters=eval(params['hyperparameters']),
seed=prod_config['seed'],
citations_cols=prod_config['citations_cols'],
env=local_paths,
load_fresh=False)
classifier.train(X_train, y_train[[review_group.lower()]])
# Store models locally
save(object=classifier,
location=local_paths['store_production_models'],
filename=f"prod_models_{review_group}")
print(f'training {review_group} done')
def __call__(self, *args, **kwds):
key = (tuple(args), tuple(kwds.items()))
h = hash(key)
name = '%s/%s_%s.sobj' % (self.__dir, self.__func.__name__, h)
if os.path.exists(name):
key2, val = persist.load(name)
if key == key2:
# We save and test equality of keys to avoid
# the (extremely remote) possibility of a hash
# collision. Correctness is crucial in mathematics.
return val
val = self.__func(*args, **kwds)
persist.save((key, val), name)
return val
def __call__(self, *args, **kwds):
key = (tuple(args), tuple(kwds.items()))
h = hash(key)
name = '%s/%s_%s.sobj'%(self.__dir, self.__func.func_name, h)
if os.path.exists(name):
key2, val = persist.load(name)
if key == key2:
# We save and test equality of keys to avoid
# the (extremely remote) possibility of a hash
# collision. Correctness is crucial in mathematics.
return val
val = self.__func(*args, **kwds)
persist.save((key, val), name)
return val
def perform_model_selection(evaluate_best_models=True):
"""
Run model selection pipeline.
"""
# Load local paths file
local_paths = load_local_paths('local_paths.yaml')
# Load product config file
prod_config = load_config('../prod/prod_config.yaml', append_static=False)
# SQL set up
psql_env = load_psql_env(pgpass_path=local_paths['pgpass_path'])
connection = SQLConn(psql_env)
connection.open()
# Pull data
X_train, X_test, y_train, y_test = sample(
ignition=prod_config,
connection=connection,
local_features_path=local_paths['store_features'])
if evaluate_best_models:
# Test best models for each review group
scored_papers_test = load(location=local_paths['store_scored_papers'],
filename='scored_papers')
y_pred_test = scored_papers_test[[
col for col in scored_papers_test.columns
if col.upper() in prod_config['review_groups_recall'].keys()
]]
y_test = y_test[[
col for col in y_test.columns
if col.upper() in prod_config['review_groups_recall'].keys()
]]
# calculate thresholds
upper_thresholds, lower_thresholds, recall_at_thresholds = get_thresholds(
y_test, y_pred_test, minimum_recall=0.99)
# persist thresholds for production
save(upper_thresholds, local_paths['store_production_models'],
'upper_thresholds')
save(lower_thresholds, local_paths['store_production_models'],
'lower_thresholds')
# calculate workload reductions
keep, consider, discard = get_workload_reduction(
y_test, y_pred_test, upper_thresholds, lower_thresholds)
rg_list = []
wrkld_reductions = []
# loop over review groups
for review_group in tqdm(prod_config['review_groups_recall'].keys(),
desc='Review Group'):
rg = review_group.lower()
# get thresholds
thresholds = [upper_thresholds[rg], lower_thresholds[rg]]
recall_at_threshold = [
recall_at_thresholds[rg]['upper'],
recall_at_thresholds[rg]['lower']
]
workload_reduction = [keep[rg], consider[rg], discard[rg]]
rg_list.append(rg)
wrkld_reductions.append(workload_reduction)
d = {'review_group': rg_list, 'workload_reduction': wrkld_reductions}
df = pd.DataFrame.from_dict(d)
plot_average_workload_reduction(df)
connection.close()
print("Model selection pipeline complete.")
def train(self, x_train, y_train):
"""
Trains classifier for each review group and stores
it in a dictionary that is a class attribute.
Parameters
==========
x_train : pd.DataFrame
Dataframe with columns corresponding to features to include in the model.
y_train : pd.DataFrame
DataFrame containing the labels for each paper. Each column represents one
review group with binary labels.
Returns
=======
None
"""
### preprocess ###
if self.tfidf:
# check if vectorizer has been created before, if so load from file
if check_persisted(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X', self.load_fresh):
vec = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec')
X = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X')
else:
# get the tokenized papers
tokenized_papers = list(x_train[self.tokens_col])
vec = TfidfVectorizer(ngram_range=self.ngram_range,
max_features=self.max_vocab_f,
strip_accents='unicode',
token_pattern=self.token_pattern,
min_df=self.min_df)
# generate term document matrix (model inputs)
X = vec.fit_transform(tokenized_papers)
save(vec,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec',
persist=True)
save(X,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X',
persist=True)
self.vectorizer = vec
else:
X = x_train
# discard fold ID column from labels
review_groups = [col for col in y_train.columns if not col == 'k']
# train
for review_group in tqdm(review_groups, desc='Train Review Groups'):
# pull label column
labels = y_train[review_group]
# creating parameters for xgboost
classifier = AdaBoostClassifier(base_estimator=self.base_estimator,
n_estimators=self.n_estimators,
learning_rate=self.learning_rate,
algorithm=self.algorithm,
random_state=self.seed).fit(
X, labels)
# save classifier to class attribute
self.models[review_group] = classifier
def train(self, x_train, y_train):
"""
Trains one elastic logistic classifier per review group. Saves the trained
classifiers within self.models.
Parameters
==========
x_train : pandas DataFrame
DataFrame containing the papers we aim to
classify, with as columns (at least):
tokens_baseline - previously tokenized title-abstract
y_train : pandas DataFrame
DataFrame containing the labels for each paper. Each
column represents one review group with binary labels.
"""
# check if vectorizer has been created before, if so load from file
if check_persisted(f"{self.env['store_misc']}/pca",
f'{self.vectorizer_hash}_X', self.load_fresh):
pca = load(f"{self.env['store_misc']}/pca",
f'{self.vectorizer_hash}_pca')
vec = load(f"{self.env['store_misc']}/pca",
f'{self.vectorizer_hash}_vec')
X = load(f"{self.env['store_misc']}/pca",
f'{self.vectorizer_hash}_X')
else:
# get the tokenized papers
tokenized_papers = list(x_train[self.tokens_col])
vec = TfidfVectorizer(ngram_range=self.ngram_range,
max_features=self.max_vocab_f,
strip_accents='unicode')
# generate term document matrix (model inputs)
X_tfidf = vec.fit_transform(tokenized_papers)
# reduce dimensionality of tf-idf features through PCA
pca = TruncatedSVD(n_components=self.n_components,
random_state=self.seed)
X = pca.fit_transform(X_tfidf)
save(pca,
f"{self.env['store_misc']}/pca",
f'{self.vectorizer_hash}_pca',
persist=True)
save(vec,
f"{self.env['store_misc']}/pca",
f'{self.vectorizer_hash}_vec',
persist=True)
save(X,
f"{self.env['store_misc']}/pca",
f'{self.vectorizer_hash}_X',
persist=True)
self.pca = pca
self.vectorizer = vec
# discard fold ID column from labels
review_groups = [col for col in y_train.columns if not col == 'k']
for review_group in tqdm(review_groups, desc='Train Review Groups'):
# pull label column
labels = y_train[review_group]
# logistic classifier
classifier = SGDClassifier(loss="log",
alpha=self.alpha,
l1_ratio=self.l1_ratio,
penalty="elasticnet").fit(X, labels)
# save the model in dictionary of models
self.models[review_group] = classifier
""" yacht control
"""
import sys
import speak
import time
import persist
from menu import *
# the following are application specific so should be in the menu
from switch import *
from barometer import *
persist.save(Switch(),'barotalk')
persist.save(Switch(),'anchortalk')
def visit(item) :
action = item.getAttribute('action')
if action == "" :
text = item.getAttribute('title')
else :
text = eval(action)
speak.say(text)
print text
name = sys.argv[1]
menu = Menu(name)
menu.run(visit)
def train(self, x_train, y_train):
"""
Trains one elastic logistic classifier per review group. Saves the trained
classifiers within self.models.
Parameters
==========
x_train : pandas DataFrame
DataFrame containing the papers we aim to
classify, with a column corresponding to the tokens to use.
y_train : pandas DataFrame
DataFrame containing the labels for each paper. Each
column represents one review group with binary labels.
"""
# check if vectorizer has been created before, if so load from file
if check_persisted(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X', self.load_fresh):
vec = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec')
X = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X')
else:
# get the tokenized papers
tokenized_papers = list(x_train[self.tokens_col])
vec = TfidfVectorizer(max_features=self.max_vocab_f,
strip_accents='unicode')
# generate term document matrix (model inputs)
X = vec.fit_transform(tokenized_papers)
save(vec,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec',
persist=True)
save(X,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X',
persist=True)
self.vectorizer = vec
if check_persisted(f"{self.env['store_misc']}/embeddings",
f'{self.vectorizer_hash}_X', self.load_fresh):
weighted_embeddings = load(f"{self.env['store_misc']}/embeddings",
f'{self.vectorizer_hash}_X')
else:
self.embeddings_model = load_word2vec(self.env['word2vec_model'])
weighted_embeddings = np.array(self.create_embeddings(X, vec))
save(weighted_embeddings,
f"{self.env['store_misc']}/embeddings",
f'{self.vectorizer_hash}_X',
persist=True)
# discard fold ID column from labels
review_groups = [col for col in y_train.columns if not col == 'k']
for review_group in tqdm(review_groups, desc='Train Review Groups'):
# pull label column
labels = y_train[review_group]
#initiate random forest model
classifier = RandomForestClassifier(
n_estimators=self.n_estimators,
max_depth=self.max_depth,
max_features=self.max_features,
min_samples_split=self.min_samples_split,
min_samples_leaf=self.min_samples_leaf,
random_state=self.seed,
n_jobs=self.n_jobs).fit(weighted_embeddings, labels)
# save the model in dictionary of models
self.models[review_group] = classifier
def run_pipeline(ignition_file, persist_all, load_all_fresh):
"""
An adhoc pipeline created to mirror the standard ML pipeline and work
with citations data.
Parameters:
===========
ignition_file: string
name of the yaml file for which you want to run an experiment
persist_all: boolean
T if you want to persist all data for future use
load_all_fresh: boolean
T if you want to avoid any persisted data and load new data from scrath
Returns:
========
None
"""
model_parts = {}
##### 1. LOAD ENVIRONMENT DATA #####
# load local paths
local_paths_env = load_local_paths('local_paths.yaml')
print('Local paths loaded.')
# load ignition file
ignition = load_config(local_paths_env['ignition_path'] + ignition_file)
print('Ignition loaded.')
# id used for persisting
hash_id = create_hash_id(str(ignition['id']))
print('Hash id created.')
# create hyperparameter combinations (for k-folding)
hyperparameters = expand_grid(ignition['hyperparameters'])
# load environment file
psql_env = load_psql_env(pgpass_path=local_paths_env['pgpass_path'])
print('PSQL environment file loaded.')
# Initiate PSQL Connection
connection = SQLConn(psql_env)
connection.open()
##### 2. LOAD TRAIN AND TEST DATA #####
if check_persisted(local_paths_env['store_train_data'], f'{hash_id}_x',
load_all_fresh):
print("Found data")
# data loaded before: load from file
X_train = load(local_paths_env['store_train_data'], f'{hash_id}_x')
X_test = load(local_paths_env['store_test_data'], f'{hash_id}_x')
y_train = load(local_paths_env['store_train_data'], f'{hash_id}_y')
y_test = load(local_paths_env['store_test_data'], f'{hash_id}_y')
print('Loaded data from file.')
else:
print("Data not found in storage - load from database")
# data not loaded: pull from database and create features
X_train, X_test, y_train, y_test = sample(
ignition, connection, local_paths_env['store_features'])
print(f"X_train shape: {X_train.shape}")
print(f"X_test shape: {X_test.shape}")
print(f"y_train shape: {y_train.shape}")
print(f"y_test shape: {y_test.shape}")
# add fold index column to data
X_train, y_train = k_fold(X_train, y_train, ignition['k_folds'],
ignition['k_folds_seed'])
# save data to file for future use
save(X_train, local_paths_env['store_train_data'], f'{hash_id}_x',
persist_all)
save(X_test, local_paths_env['store_test_data'], f'{hash_id}_x',
persist_all)
save(y_train, local_paths_env['store_train_data'], f'{hash_id}_y',
persist_all)
save(y_test, local_paths_env['store_test_data'], f'{hash_id}_y',
persist_all)
print('Data loading completed.')
##### 3. K-FOLDING #####
# loop over folds
for fold in tqdm(range(ignition['k_folds']), desc='Folds'):
# get fold id hash (for persisting)
fold_id = create_hash_id(str(ignition['id']) + str(fold))
# get fold data
fold_X_train = X_train[X_train['k'] != fold]
fold_X_test = X_train[X_train['k'] == fold]
fold_y_train = y_train[y_train['k'] != fold]
fold_y_test = y_train[y_train['k'] == fold]
# store fold features, if any
fold_features = {}
##### 4. LOOP OVER HYPERPARAMETERS: TRAIN CLASSIFIER #####
for hyperparam in tqdm(hyperparameters, desc='Hyperparameters'):
# create hyperparam unique id and hyperparam-fold unique id
hyperparam_id = create_hash_id(
str(ignition['id']) + str(hyperparam))
hyperparam_fold_id = create_hash_id(
str(ignition['id']) + str(hyperparam) + str(fold))
# if not check_val_in_db(connection, ignition['results_table_name'],
# 'results', 'hash_id', hyperparam_fold_id, len(ignition['recalls'])):
# create classifier of specified type and with specified target
classifier = select_classifier(ignition["model_type"],
fold_id,
ignition["target"],
ignition["classes"],
fold_features,
hyperparameters=hyperparam,
seed=ignition['seed'],
env=local_paths_env,
load_fresh=load_all_fresh)
#print('Classifier created.')
# train classifier
classifier.train(fold_X_train, fold_y_train)
##### 5. TEST CLASSIFIER #####
# generate predictions from classifier
y_probs = classifier.predict(fold_X_test)
##### 6. EVALUATION #####
for recall in tqdm(ignition['recalls'], desc='Evaluations'):
# compute evaluation metrics
all_metrics = compute_metrics(
metric_names=ignition['metrics'],
y_true=fold_y_test.drop(columns=['k']),
y_pred=y_probs,
k=recall)
# store results in database
unique_id = create_hash_id(
str(ignition['id']) + str(hyperparam) + str(fold) +
str(recall))
results_to_db(metrics=all_metrics,
table_name=ignition['results_table_name'],
ignition_id=ignition['id'],
hash_id=hyperparam_fold_id,
algorithm=ignition['model_type'],
hyperparameters=hyperparam,
fold=str(fold),
recall=recall,
unique_id=unique_id,
connection=connection)
connection.close()
print(f"Done running pipeline for ignition id: {ignition['id']}!")
def save_current(gb):
persist.save(gb, gb.file_name())
persist.log_config_warnings(gb)
def train(self, x_train, y_train):
"""
Trains one elastic logistic classifier per review group. Saves the trained
classifiers within self.models.
Parameters
==========
x_train : pandas DataFrame
DataFrame containing the papers we aim to
classify, with a column for the token to use.
y_train : pandas DataFrame
DataFrame containing the labels for each paper. Each
column represents one review group with binary labels.
"""
if self.tfidf:
# check if vectorizer has been created before, if so load from file
if check_persisted(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X', self.load_fresh):
vec = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec')
X = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X')
X = hstack(
[csr_matrix(x_train.drop(self.tokens_col, axis=1)), X])
else:
# get the tokenized papers
tokenized_papers = list(x_train[self.tokens_col])
vec = TfidfVectorizer(ngram_range=self.ngram_range,
max_features=self.max_vocab_f,
strip_accents='unicode')
# generate term document matrix (model inputs)
X = vec.fit_transform(tokenized_papers)
save(vec,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec',
persist=True)
save(X,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X',
persist=True)
X = hstack(
[csr_matrix(x_train.drop(self.tokens_col, axis=1)), X])
self.vectorizer = vec
else:
X = x_train
# discard fold ID column from labels
review_groups = [col for col in y_train.columns if not col == 'k']
for review_group in tqdm(review_groups, desc='Train Review Groups'):
# pull label column
labels = y_train[review_group]
# Create data structure for XGBoost
data_dmatrix = xgb.DMatrix(data=X, label=labels)
# creating parameters for xgboost
params = {
'objective': self.objective,
'learning_rate': self.learning_rate,
'max_depth': self.max_depth,
'subsample': self.subsample,
'colsample_bytree': self.colsample_bytree,
'n_estimators': self.n_estimators,
'objective': self.objective,
'gamma': self.gamma,
'alpha': self.l1,
'lambda': self.l2
}
# xgboost
self.models[review_group] = xgb.train(params, data_dmatrix)
def save_and_exit(gb):
persist.save(gb, gb.file_name())
persist.log_config_warnings(gb)
menus.m_main.close()
def train(self, x_train, y_train):
"""
Trains one elastic logistic classifier per review group. Saves the trained
classifiers within self.models.
Parameters
==========
x_train : pandas DataFrame
DataFrame containing the papers we aim to
classify, with at least the column:
average_embeddings - average word embeddings for concatenated title and abstract
y_train : pandas DataFrame
DataFrame containing the labels for each paper. Each
column represents one review group with binary labels.
"""
# check if data has been created before, if so load from file
if check_persisted(f"{self.env['store_misc']}/pca",
f'{self.fold_hash}_X', self.load_fresh):
pca = load(f"{self.env['store_misc']}/pca",
f'{self.fold_hash}_pca')
X = load(f"{self.env['store_misc']}/pca", f'{self.fold_hash}_X')
else:
# convert input to format for classifier
list_of_embeddings = list(x_train[self.embeddings_col])
x_train = np.array(
[[float(i) for i in embedding.strip('[]').split()]
for embedding in list_of_embeddings])
# reduce dimensionality of embeddings through PCA
pca = PCA(n_components=self.n_components, random_state=self.seed)
X = pca.fit_transform(x_train)
save(pca,
f"{self.env['store_misc']}/pca",
f'{self.fold_hash}_pca',
persist=True)
save(X,
f"{self.env['store_misc']}/pca",
f'{self.fold_hash}_X',
persist=True)
self.pca = pca
# discard fold ID column from labels
review_groups = [col for col in y_train.columns if not col == 'k']
for review_group in tqdm(review_groups, desc='Train Review Groups'):
# pull label column
labels = y_train[review_group]
# logistic classifier
classifier = SGDClassifier(loss="log",
alpha=self.alpha,
l1_ratio=self.l1_ratio,
penalty="elasticnet").fit(X, labels)
# save the model in dictionary of models
self.models[review_group] = classifier
def train(self, x_train, y_train):
"""
Trains one classifier per review group. Saves the trained
classifiers within self.models.
Parameters
==========
x_train : pandas DataFrame
DataFrame containing the papers we aim to
classify, with a column for the token to use.
y_train : pandas DataFrame
DataFrame containing the labels for each paper. Each
column represents one review group with binary labels.
"""
if self.tfidf:
# check if vectorizer has been created before, if so load from file
if check_persisted(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X', self.load_fresh):
vec = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec')
X = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X')
#X = hstack([csr_matrix(x_train.drop(self.tokens_col, axis=1)),X])
else:
# get the tokenized papers
tokenized_papers = list(x_train[self.tokens_col])
vec = TfidfVectorizer(ngram_range=self.ngram_range,
max_features=self.max_vocab_f,
strip_accents='unicode')
# generate term document matrix (model inputs)
X = vec.fit_transform(tokenized_papers)
save(vec,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec',
persist=True)
save(X,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X',
persist=True)
#X = hstack([csr_matrix(x_train.drop(self.tokens_col, axis=1)),X])
self.vectorizer = vec
else:
X = x_train
# discard fold ID column from labels
review_groups = [col for col in y_train.columns if not col == 'k']
for review_group in tqdm(review_groups, desc='Train Review Groups'):
# pull label column
labels = y_train[review_group]
# Create data structure for light gbm
data_dmatrix = lgb.Dataset(data=X, label=labels)
# creating parameters for light gbm
params = {
'task': self.task,
'application': self.application,
'num_iterations': self.num_iterations,
'num_leaves': self.num_leaves,
'device': self.device,
'min_data_in_leaf': self.min_data_in_leaf,
'feature_fraction': self.feature_fraction,
'bagging_fraction': self.bagging_fraction,
'min_gain_to_split': self.min_gain_to_split,
'num_threads': self.num_threads,
'max_depth': self.max_depth,
'verbosity': -1
}
# light gbm
self.models[review_group] = lgb.train(params, data_dmatrix)
def train(self, x_train, y_train):
"""
Trains one elastic logistic classifier per review group. Saves the trained
classifiers within self.models.
Parameters
==========
x_train : pandas DataFrame
DataFrame containing the papers we aim to
classify, with as columns (at least):
tokens_baseline - previously tokenized title-abstract
y_train : pandas DataFrame
DataFrame containing the labels for each paper. Each
column represents one review group with binary labels.
"""
# check if data has been created before, if so load from file
if check_persisted(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X', self.load_fresh):
X = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X')
# check for vectorizers
if self.tokens_col is not None:
vec = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec')
self.vectorizer = vec
if self.tokens_col2 is not None:
vec2 = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec2')
self.vectorizer2 = vec2
else:
if self.tokens_col is not None:
# get the tokenized papers
tokenized_papers = list(x_train[self.tokens_col])
vec = TfidfVectorizer(ngram_range=self.ngram_range,
max_features=self.max_vocab_f,
strip_accents='unicode',
token_pattern=self.token_pattern,
min_df=self.min_df)
# generate term document matrix (model inputs)
X = vec.fit_transform(tokenized_papers)
save(vec,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec',
persist=True)
self.vectorizer = vec
if self.tokens_col2 is not None:
tokenized_papers2 = x_train[self.tokens_col2].apply(
lambda x: np.str_(x))
vec2 = TfidfVectorizer(ngram_range=self.ngram_range,
max_features=self.max_vocab_f2,
strip_accents='unicode',
token_pattern=self.token_pattern,
min_df=self.min_df,
decode_error='ignore')
X2 = vec2.fit_transform(tokenized_papers2)
try:
X = hstack([X, X2])
except:
X = X2
save(vec2,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec2',
persist=True)
self.vectorizer2 = vec2
if self.citations_cols is not None:
X3 = csr_matrix(x_train[self.citations_cols].values)
try:
X = hstack([X, X3])
except:
X = X3
save(X,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X',
persist=True)
# discard fold ID column from labels
review_groups = [col for col in y_train.columns if not col == 'k']
for review_group in tqdm(review_groups, desc='Train Review Groups'):
# pull label column
labels = y_train[review_group]
# logistic classifier
classifier = SGDClassifier(loss="log",
alpha=self.alpha,
l1_ratio=self.l1_ratio,
penalty="elasticnet").fit(X, labels)
# save the model in dictionary of models
self.models[review_group] = classifier
def perform_model_selection(evaluate_best_models=True):
"""
Run model selection pipeline.
"""
# Load local paths file
local_paths = load_local_paths('local_paths.yaml')
# Load product config file
prod_config = load_config('../prod/prod_config.yaml', append_static=False)
# Load results table from dbs
results_df = pull_results(ignition_ids=[
'1', '2', '4', '5', '6', '10', '15', '16', '17', '18', '19', '20', '21'
])
# Get a dataframe of best algorithm x hyperparameters for each RG x recall
best_df = get_best_algorithm_hyperparameter_onestep(results_df=results_df)
# Get dictionary of algorithms and hyperparameters for each
# review group based on recall in product config file
best_models = choose_models_with_recall(
models_df=best_df,
group_min_recalls=prod_config['review_groups_recall'])
# SQL set up
psql_env = load_psql_env(pgpass_path=local_paths['pgpass_path'])
connection = SQLConn(psql_env)
connection.open()
# Pull data
X_train, X_test, y_train, y_test = sample(
ignition=prod_config,
connection=connection,
local_features_path=local_paths['store_features'])
# Train best models for each review group
train_best_models_mp(X_train,
y_train,
best_models=best_models,
prod_config=prod_config,
local_paths=local_paths,
cores=3)
if evaluate_best_models:
# Test best models for each review group
scored_papers_test = score_papers(
X_test,
prod_config,
models_path=local_paths['store_production_models'])
save(object=scored_papers_test,
location=local_paths['store_scored_papers'],
filename='scored_papers_citations')
y_pred_test = scored_papers_test[[
col for col in scored_papers_test.columns
if col.upper() in prod_config['review_groups_recall'].keys()
]]
y_test = y_test[[
col for col in y_test.columns
if col.upper() in prod_config['review_groups_recall'].keys()
]]
# calculate thresholds
upper_thresholds, lower_thresholds, recall_at_thresholds = get_thresholds(
y_test, y_pred_test, minimum_precision=0.95, minimum_recall=0.99)
# persist thresholds for production
save(upper_thresholds, local_paths['store_production_models'],
'upper_thresholds')
save(lower_thresholds, local_paths['store_production_models'],
'lower_thresholds')
# calculate workload reductions
keep, consider, discard = get_workload_reduction(
y_test, y_pred_test, upper_thresholds, lower_thresholds)
# loop over review groups
for review_group in tqdm(prod_config['review_groups_recall'].keys(),
desc='Review Group'):
rg = review_group.lower()
# get thresholds
thresholds = [upper_thresholds[rg], lower_thresholds[rg]]
recall_at_threshold = [
recall_at_thresholds[rg]['upper'],
recall_at_thresholds[rg]['lower']
]
workload_reduction = [keep[rg], consider[rg], discard[rg]]
# evaluate scores
for recall in tqdm(prod_config['recalls'], desc='Evaluations'):
# calculate precisions
precisions = evaluate_precision_at_k_recall(
class_true=y_test, class_prob=y_pred_test, k=recall)
# store results in database
production_results_to_db(
table_name=prod_config['results_table_name'],
unique_id=f"{rg}_{recall}",
review_group=rg,
algorithm=best_models[review_group]['algorithm'],
hyperparameters=best_models[review_group]
['hyperparameters'],
recall=recall,
precision=precisions[rg],
thresholds=thresholds,
recall_at_threshold=recall_at_threshold,
workload_reduction=workload_reduction,
connection=connection)
connection.close()
print("Model selection pipeline complete.")
def train(self, x_train, y_train):
"""
Trains one elastic logistic classifier per review group. Saves the trained
classifiers within self.models.
Parameters
==========
x_train : pandas DataFrame
DataFrame containing the papers we aim to
classify, with as columns (at least):
tokens_baseline - previously tokenized title-abstract
y_train : pandas DataFrame
DataFrame containing the labels for each paper. Each
column represents one review group with binary labels.
"""
# check if vectorizer has been created before, if so load from file
if check_persisted(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X', self.load_fresh):
vec = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec')
X = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X')
if self.tokens_col2 is not None:
vec2 = load(f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec2')
self.vectorizer2 = vec2
else:
# get the tokenized papers
tokenized_papers = list(x_train[self.tokens_col])
vec = TfidfVectorizer(ngram_range=self.ngram_range,
max_features=self.max_vocab_f,
strip_accents='unicode',
token_pattern=self.token_pattern,
min_df=self.min_df)
# generate term document matrix (model inputs)
X = vec.fit_transform(tokenized_papers)
if self.tokens_col2 is not None:
tokenized_papers2 = x_train[self.tokens_col2].apply(
lambda x: np.str_(x))
vec2 = TfidfVectorizer(ngram_range=self.ngram_range,
max_features=self.max_vocab_f2,
strip_accents='unicode',
token_pattern=self.token_pattern,
min_df=self.min_df,
decode_error='ignore')
X2 = vec2.fit_transform(tokenized_papers2)
X = hstack([X, X2])
save(vec2,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec2',
persist=True)
self.vectorizer2 = vec2
save(vec,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_vec',
persist=True)
save(X,
f"{self.env['store_misc']}/tfidf",
f'{self.vectorizer_hash}_X',
persist=True)
self.vectorizer = vec
# discard fold ID column from labels
review_groups = [col for col in y_train.columns if not col == 'k']
for review_group in tqdm(review_groups, desc='Train Review Groups'):
# pull label column
labels = y_train[review_group]
#initiate random forest model
classifier = RandomForestClassifier(
n_estimators=self.n_estimators,
max_depth=self.max_depth,
max_features=self.max_features,
min_samples_split=self.min_samples_split,
min_samples_leaf=self.min_samples_leaf,
random_state=self.seed,
n_jobs=self.n_jobs).fit(X, labels)
# save the model in dictionary of models
self.models[review_group] = classifier
