def fit_model(X, y, classifier_settings={}, fit_settings={}):
strategy = classifier_settings.get("numerical_impute_strategy")
if strategy is None:
raise Exception("Missing impute strategy for numerical features")
numeric_transformer = Pipeline(steps=[("num_impute",
SimpleImputer(strategy=strategy))])
strategy = classifier_settings.get("categorical_impute_strategy")
if strategy is None:
raise Exception("Missing impute strategy for categorical features")
categorical_transformer = Pipeline(steps=[
("cat_impute", SimpleImputer(strategy=strategy)),
("ohe", OneHotEncoder(drop="if_binary", handle_unknown="error")),
])
preprocessor = ColumnTransformer(transformers=[
("num", numeric_transformer,
make_column_selector(dtype_include=np.number)),
(
"cat",
categorical_transformer,
make_column_selector(dtype_exclude=np.number),
),
])
clf = Pipeline(steps=[("preprocessor",
preprocessor), ("classifier",
LogisticRegression())])
clf.fit(X, y)
return clf
def fit_model(X, y, classifier_settings={}, fit_settings={}):
numeric_transformer = Pipeline(steps=[("identity", IdentityTransformer())])
categorical_transformer = Pipeline(steps=[
("ohe", OneHotEncoder(drop="if_binary", handle_unknown="error")),
])
preprocessor = ColumnTransformer(transformers=[
("num", numeric_transformer,
make_column_selector(dtype_include=np.number)),
(
"cat",
categorical_transformer,
make_column_selector(dtype_exclude=np.number),
),
])
xgb_clf = xgb.sklearn.XGBClassifier(**classifier_settings)
clf = Pipeline(steps=[("preprocessor",
preprocessor), ("classifier", xgb_clf)])
clf.fit(X, y, **fit_settings)
return clf
def test_ColumnTransformer_with_selector():
expected = pd.DataFrame({
"name": [
"hotel",
"hotel",
"meal",
"meal",
"meal",
"lead_time",
"average_daily_rate",
],
"feature": [
"x0_City_Hotel",
"x0_Resort_Hotel",
"x1_BB",
"x1_HB",
"x1_SC",
"lead_time",
"average_daily_rate",
],
})
preprocess = make_column_transformer(
(OneHotEncoder(sparse=False),
make_column_selector(dtype_include=object)),
(StandardScaler(), numeric,
make_column_selector(dtype_exclude=object)),
)
preprocess.fit(X)
assert feat(preprocess, X.columns).equals(expected)
def build_pipeline(X_train):
categorical_values = []
cat_subset = X_train.select_dtypes(
include=['object', 'category', 'bool'])
for i in range(cat_subset.shape[1]):
categorical_values.append(
list(cat_subset.iloc[:, i].dropna().unique()))
date_pipeline = Pipeline([('dateFeatures', process.DateTransform())])
num_pipeline = Pipeline([('cleaner', SimpleImputer()),
('scaler', StandardScaler())])
cat_pipeline = Pipeline([
('cleaner', SimpleImputer(strategy='most_frequent')),
('encoder',
OneHotEncoder(sparse=False, categories=categorical_values))
])
preprocessor = ColumnTransformer([
('numerical', num_pipeline,
make_column_selector(
dtype_exclude=['object', 'category', 'bool'])),
('categorical', cat_pipeline,
make_column_selector(
dtype_include=['object', 'category', 'bool']))
])
return preprocessor
def test_column_transformer_with_make_column_selector():
# Functional test for column transformer + column selector
pd = pytest.importorskip('pandas')
X_df = pd.DataFrame(
{
'col_int': np.array([0, 1, 2], dtype=np.int),
'col_float': np.array([0.0, 1.0, 2.0], dtype=np.float),
'col_cat': ["one", "two", "one"],
'col_str': ["low", "middle", "high"]
},
columns=['col_int', 'col_float', 'col_cat', 'col_str'])
X_df['col_str'] = X_df['col_str'].astype('category')
cat_selector = make_column_selector(dtype_include=['category', object])
num_selector = make_column_selector(dtype_include=np.number)
ohe = OneHotEncoder()
scaler = StandardScaler()
ct_selector = make_column_transformer((ohe, cat_selector),
(scaler, num_selector))
ct_direct = make_column_transformer((ohe, ['col_cat', 'col_str']),
(scaler, ['col_float', 'col_int']))
X_selector = ct_selector.fit_transform(X_df)
X_direct = ct_direct.fit_transform(X_df)
assert_allclose(X_selector, X_direct)
def set_pipeline(self):
self.pipeline = self.kwargs.get("pipeline", None)
# Create a temp folder
cachedir = mkdtemp()
# Pipeline structure
num_transformer = MinMaxScaler()
cat_transformer = OneHotEncoder(handle_unknown = 'ignore')
feateng_blocks = [
("num_transformer", num_transformer, make_column_selector(dtype_include = ['int', 'float'])),
("cat_transformer", cat_transformer, make_column_selector(dtype_include = ['object', 'bool']))
]
features_encoder = columnTransformer(feateng_blocks,
n_jobs = None,
remainder = "drop"
)
# Combine preprocessing and model:
self.pipeline = Pipeline(steps = [
('features', features_encoder),
('model', self.get_estimator())
],
memory = cachedir # Avoid recalculating transformer variables during cross validations or grid searches
)
# Clear the cache directory after the cross-validation
rmtree(cachedir)
def features1():
return [
("shift_0", Shift(0), make_column_selector(dtype_include=np.number)),
("shift_1", Shift(1), make_column_selector(dtype_include=np.number)),
(
"moving_average_3",
MovingAverage(window_size=3),
make_column_selector(dtype_include=np.number),
),
]
def columns_transform():
return make_column_transformer(
(
StandardScaler(),
make_column_selector("^(?!crashYear)", dtype_include=np.number),
),
(
OneHotEncoder(handle_unknown="ignore"),
make_column_selector(dtype_include=object),
),
)
def feature_selection(X: pd.DataFrame, y: pd.DataFrame):
fe_column_transformer = ColumnTransformer(
transformers=[('numeric', SelectKBest(score_func=f_classif, k="all"),
make_column_selector(dtype_include=np.number)),
('categorical', SelectKBest(score_func=chi2, k="all"),
make_column_selector(dtype_include="category"))])
fe_column_transformer.fit(X, y)
X = fe_column_transformer.transform(X)
return X, y
def dataset_transform():
return ColumnTransformer(
[
("scaler", StandardScaler(),
make_column_selector(dtype_include="number")),
(
"encoder",
OneHotEncoder(handle_unknown="ignore"),
make_column_selector(dtype_include=object),
),
],
remainder="passthrough",
)
def __init__(self, X, y):
'''
This creates the X_train, X_test, y_train, y_test arrays
self.X_train
self.X_test
self.y_train
self.y_test
This also creates the simple preprocessing object
A column transformer with two sides able to automatically handle
numerical and categeorical data.
Default Numerical Simple Inputter uses strategy 'mean'
Default Categoerical Simple Inputter uses fill value 'other'
self.preprocessing
'''
X_train, X_test, y_train, y_test = train_test_split(X, y)
self.X_train = X_train
self.X_test = X_test
self.y_train = y_train
self.y_test = y_test
# Below is the basic preprocessing pipeline
# https://scikit-learn.org/stable/auto_examples/compose/plot_column_transformer_mixed_types.html
# set up numerical pipeline
numeric_transformer = Pipeline(
steps=[('num_imputer', SimpleImputer(
strategy='mean')), ('num_scaler', StandardScaler())])
# Set up categorical papeline
categorical_transformer = Pipeline(
steps=[('cat_imputer',
SimpleImputer(strategy='constant', fill_value='Other')
), ('cat_onehot', OneHotEncoder(handle_unknown='ignore')
), ('cat_scaler', StandardScaler(with_mean=False))])
# set up preprocessing column transformer
preprocessing = ColumnTransformer(
transformers=[('num', numeric_transformer,
make_column_selector(dtype_include=np.number)),
('cat', categorical_transformer,
make_column_selector(dtype_include='object'))])
self.preprocessing = preprocessing
def __init__(self, return_df=True):
self.return_df = return_df
self.impute_median = SimpleImputer(strategy='median')
self.impute_const = SimpleImputer(strategy='constant')
self.ss = StandardScaler()
self.ohe = OneHotEncoder(handle_unknown='ignore')
self.num_cols = make_column_selector(dtype_include='number')
self.cat_cols = make_column_selector(dtype_exclude='number')
self.prerocessor = make_column_transformer(
(make_pipeline(self.impute_median, self.ss), self.num_cols),
(make_pipeline(self.impute_const, self.ohe), self.cat_cols),
)
def get_pipeline(model, impute_cat='default', impute_num = 'default', scale='default',onehot='default',remove_outliers='default'):
# in essence this splits the input into a categorical pipeline and a numeric pipeline
# merged with a ColumnTransformer
# on top a model is plugged (within OutlierExtractor if remove_outliers = True)
# this works very nicely!
cat_steps = []
if impute_cat=='default':
cat_steps.append(('impute_cat', DFSimpleImputer(strategy='constant',fill_value='None')))
elif impute_cat:
cat_steps.append(('impute_cat', impute_cat))
if onehot == 'default':
cat_steps.append(('cat_to_num', DFGetDummies()))
elif onehot:
cat_steps.append(('cat_to_num', onehot))
# equal to: cat_steps.append(('cat_to_num', DFOneHotEncoder(handle_unknown="ignore")))
categorical_transformer = Pipeline(steps=cat_steps)
num_steps = []
if impute_num == 'default':
num_steps.append(('impute_num', DFSimpleImputer(strategy='mean')))
elif impute_num:
num_steps.append(('impute_num', impute_num))
if scale == 'default':
num_steps.append(('scale_num', DFStandardScaler()))
elif scale:
num_steps.append(('scale_num', scale))
numeric_transformer = Pipeline(steps=num_steps)
col_trans = DFColumnTransformer(transformers=[
('numeric', numeric_transformer, make_column_selector(dtype_include=np.number)),
('category', categorical_transformer, make_column_selector(dtype_exclude=np.number)),
])
preprocessor_steps = [('col_trans', col_trans)]
preprocessor = Pipeline(steps=preprocessor_steps,memory=memory)
final_pipe = [('preprocess', preprocessor)]
if remove_outliers == 'default':
final_pipe.append(('model',model))
elif remove_outliers:
final_pipe.append(('model',remove_outliers)) # DFOutlierExtractor(model, corruption=0.005)
return Pipeline(steps=final_pipe)
def run_cv_model(model, X, y):
'''
Runs CrossValidation for a model and dataset
:param model: model to run
:param X: features
:param y: target
:return: void
'''
one_hot_encoder = make_column_transformer(
(OneHotEncoder(sparse=False, handle_unknown='ignore'),
make_column_selector(dtype_include='category')),
remainder='passthrough')
# pipeline = Pipeline(one_hot_encoder, model)
pipeline = make_pipeline(one_hot_encoder, model)
cv_results = cross_validate(pipeline,
X,
y,
cv=4,
scoring='neg_root_mean_squared_error',
verbose=1,
n_jobs=6)
# print(sorted(cv_results.keys()))
print("Model: " + str(model))
print("test_score")
print(cv_results['test_score'])
print("average: ", np.average(cv_results['test_score']))
return cv_results['test_score']
def __init__(self, max_features_to_select=0, n_jobs: int = -1):
"""Initialize the class.
Parameters
----------
n_jobs
Number of parallel processes to use for cross-validation.
If `n_jobs == -1` (default), use all available CPUs.
"""
self.max_features_to_select = max_features_to_select
self.n_jobs = n_jobs
transformer = ColumnTransformer([('scale', StandardScaler(),
make_column_selector(dtype_include=np.floating))],
remainder="passthrough")
logistic = LogisticRegressionCV(class_weight="balanced",
scoring="roc_auc",
solver="lbfgs",
max_iter=1000,
n_jobs=self.n_jobs)
if self.max_features_to_select > 0:
select = SelectMRMRe()
pipe = make_pipeline(transformer, select, logistic)
param_grid = {"selectmrmre__n_features": np.arange(2, self.max_features_to_select + 1)}
self.model = GridSearchCV(pipe, param_grid, n_jobs=self.n_jobs)
else:
self.model = make_pipeline(transformer, logistic)
def __init__(self, max_features_to_select=0, n_jobs: int = -1):
"""Initialize the class.
Parameters
----------
n_jobs
Number of parallel processes to use for cross-validation.
If `n_jobs == -1` (default), use all available CPUs.
"""
self.max_features_to_select = max_features_to_select
self.n_jobs = n_jobs
self.transformer = ColumnTransformer([('scale', StandardScaler(),
make_column_selector(dtype_include=np.floating))],
remainder="passthrough")
CoxRegression = sklearn_adapter(CoxPHFitter,
event_col="death",
predict_method="predict_partial_hazard")
cox = CoxRegression(step_size = 0.5)
param_grid = {"sklearncoxphfitter__penalizer": 10.0**np.arange(-2, 3)}
if self.max_features_to_select > 0:
select = SelectMRMRe(target_col="death")
# can't put CoxRegression in the pipeline since sklearn
# transformers cannot return data frames
pipe = make_pipeline(select, cox)
param_grid["selectmrmre__n_features"] = np.arange(2, self.max_features_to_select + 1)
else:
pipe = make_pipeline(cox)
# XXX lifelines sklearn adapter does not support parallelization
# for now, need to find a better workaround
self.model = GridSearchCV(pipe, param_grid, n_jobs=1)
def full_training(model, X, y):
'''
Trains a model over full split. Prints error adn plots estimations for test.
:param model: model to train
:param X: features
:param y: labels
:return: void
'''
one_hot_encoder = make_column_transformer(
(OneHotEncoder(sparse=False, handle_unknown='ignore'),
make_column_selector(dtype_include='category')),
remainder='passthrough')
pipeline = make_pipeline(one_hot_encoder, model)
X_train, X_test, y_train, y_test = train_test_split(X,
y,
test_size=0.33,
random_state=42)
model_predict = pipeline.fit(X_train, y_train)
predictions = model_predict.predict(X_test)
# The coefficients
# print('Coefficients: \n', model_predict[1].coef_)
# The mean squared error
print('Mean squared error: %.2f' % mean_squared_error(y_test, predictions))
# The coefficient of determination: 1 is perfect prediction
print('Coefficient of determination: %.2f' % r2_score(y_test, predictions))
sns.regplot(y_test, predictions)
st.pyplot()
def select_dtype_data(df,
dtype: Union[str, list] = 'NUMERIC',
return_type='pandas'):
if isinstance(dtype, str):
if dtype == 'NUMERIC':
num_ndarr = num_selector.fit_transform(df)
if return_type == 'pandas':
return pd.DataFrame(num_ndarr,
columns=num_selector.get_feature_names())
else:
return num_ndarr
if dtype == 'CATEGORICAL':
num_ndarr = cat_selector.fit_transform(df)
if return_type == 'pandas':
return pd.DataFrame(num_ndarr,
columns=cat_selector.get_feature_names())
else:
return num_ndarr
else:
data_selector = make_column_transformer(
('passthrough', make_column_selector(dtype_include=dtype)),
remainder='drop')
num_ndarr = data_selector.fit_transform(df)
if return_type == 'pandas':
return pd.DataFrame(num_ndarr,
columns=data_selector.get_feature_names())
else:
return num_ndarr
def __init__(self, p: int, horizon: int):
features = [
tuple((f"s{i}", Shift(i),
make_column_selector(dtype_include=np.number)))
for i in range(1, p + 1)
]
model = GAR(LinearRegression())
super().__init__(features=features, horizon=horizon, model=model)
def __init__(self, data_fn =None , df=None , **kwargs)->None :
self._logging = watexlog().get_watex_logger(self.__class__.__name__)
self._data_fn = data_fn
self._df =df
self.categorial_features =kwargs.pop('categorial_features', None)
self.numerical_features =kwargs.pop('numerical_features', None)
self.target =kwargs.pop('target', 'flow')
self._drop_features = kwargs.pop('drop_features', ['lwi'])
self.random_state = kwargs.pop('random_state', 0)
self.default_estimator = kwargs.pop('default_estimator', 'svc')
self._df_cache =None
self._features = None
self.y = None
self.X = None
self.X_train =None
self.X_test = None
self.y_train =None
self.y_test =None
self._num_column_selector = make_column_selector(
dtype_include=np.number)
self._cat_colum_selector =make_column_selector(
dtype_exclude=np.number)
self._features_engineering =PolynomialFeatures(
10, include_bias=False)
self._selectors= SelectKBest(f_classif, k=4)
self._scalers =RobustScaler()
self._encodages =OneHotEncoder()
self._select_estimator_ =None
for key in kwargs.keys():
setattr(self, key, kwargs[key])
if self._data_fn is not None:
self.data_fn = self._data_fn
if self.df is not None :
self._read_and_encode_catFeatures()
def get_col_transf():
num_pipe = Pipeline([('imputer', SimpleImputer(strategy='mean')),
('scaler', StandardScaler()),
('poly', 'passthrough')])
cat_pipe = Pipeline([
('imputer', SimpleImputer(strategy='most_frequent')),
('encoder', OneHotEncoder()),
])
col_t = ColumnTransformer([
('num', num_pipe,
make_column_selector(dtype_include=['int64', 'float64'])),
('cat', cat_pipe, make_column_selector(dtype_include='object'))
])
return col_t
def create_pipeline(params: dict = None):
"""
Create sklearn.pipeline.Pipeline
Parameters
----------
params : dict
dictionary of parameters for the pipeline
Returns
-------
sklearn.pipeline.Pipeline
"""
# pipeline for numeric variables
p_num = Pipeline([("num_nan_ind", AddMissingIndicator(missing_only=True)),
("rmmean", MeanMedianImputer()),
("drop_quasi_constant", DropConstantFeatures(tol=0.97))])
# pipeline for categorical variables
p_cat = Pipeline([("fill_cat_nas",
CategoricalImputer(fill_value='MISSING')),
("rlc", RareLabelEncoder()),
("one_hot_encoder", OneHotEncoder())])
# list of pipelines to combine
transformers = [("num", p_num,
make_column_selector(dtype_include=np.number)),
("cat", p_cat, make_column_selector(dtype_include=object))]
# combine pipelines and add XGBClassifier
col_transforms = ColumnTransformer(transformers)
p = Pipeline([("col_transformers", col_transforms),
("xgb",
XGBClassifier(min_child_weight=1,
gamma=0,
objective='binary:logistic',
nthread=4,
scale_pos_weight=1,
seed=1,
gpu_id=0,
tree_method='gpu_hist'))])
if params:
p.set_params(**params)
return p
def test_pipeline_make_column_selector(self):
X = pandas.DataFrame({
'city': ['London', 'London', 'Paris', 'Sallisaw'],
'rating': [5, 3, 4, 5]})
X['rating'] = X['rating'].astype(numpy.float32)
ct = make_column_transformer(
(StandardScaler(), make_column_selector(
dtype_include=numpy.number)),
(OneHotEncoder(), make_column_selector(
dtype_include=object)))
expected = ct.fit_transform(X)
onx = to_onnx(ct, X, target_opset=TARGET_OPSET)
sess = InferenceSession(onx.SerializeToString())
names = [i.name for i in sess.get_inputs()]
got = sess.run(None, {names[0]: X[names[0]].values.reshape((-1, 1)),
names[1]: X[names[1]].values.reshape((-1, 1))})
assert_almost_equal(expected, got[0])
def create_pipeline(self):
preprocessing_pipeline = Pipeline([
('drop_columns', FunctionTransformer(self.drop_columns, kw_args={'columns_to_drop': FEATURES_TO_DROP})),
# Need to convert to string otherwise leads to error when imputing object data:
('convert_object_columns_to_string', FunctionTransformer(self.convert_object_columns_to_string))
])
# Pipeline of operations to perform on any object columns in DataFrame
object_pipeline = Pipeline(
[
('most_frequent_imputer', SimpleImputer(strategy='most_frequent')), # Very slow
('ohe', OneHotEncoder())
]
)
# Pipeline of operations to perform on any numeric columns in DataFrame
numeric_pipeline = Pipeline(
[
('mean_imputer', SimpleImputer(strategy='mean')),
('min_max_scalar', MinMaxScaler())
]
)
full_pipeline = Pipeline(
[
(
'process_data',
ColumnTransformer(
[
('numeric_processing', numeric_pipeline, make_column_selector(dtype_include=np.number)),
('object_processing', object_pipeline, make_column_selector(dtype_include=object))
]
)
)
]
)
end_to_end_pipeline = Pipeline(
[
('preprocessing', preprocessing_pipeline),
('processing', full_pipeline),
('model', lightgbm.LGBMClassifier())
]
)
return end_to_end_pipeline
def make_column_transformer(num_missing_impute_strategy='mean'):
"""[create a data preprocess pipeline using sklearn pipeline]
Todo
"""
num_imputer = Pipeline([
("imputer",
SimpleImputer(strategy=num_missing_impute_strategy,
add_indicator=False))
])
cat_ohe = Pipeline([
("cat_imputer", SimpleImputer(strategy='constant', fill_value='NA')),
('ohe', OneHotEncoder(dtype=np.int, handle_unknown='ignore'))
])
return ColumnTransformer(
[('imp', num_imputer, make_column_selector(dtype_include=np.number)),
('ohe', cat_ohe,
make_column_selector(dtype_include=['object', 'category']))],
remainder='passthrough')
def __init__(self, horizon: int, seasonal_length: int):
features = [
("s1", Shift(0), make_column_selector()),
]
super().__init__(
features=features,
horizon=horizon,
model=SeasonalNaiveForecaster(seasonal_length),
)
def make_normalizer_column_transformer(normalizations: Dict[SensorComponent,
Normalization]):
transformers = []
for sensor_component, normalization in normalizations.items():
selector = make_column_selector(pattern=sensor_component +
MATCH_REST_REGEX)
transformers.append(
(sensor_component, get_normalizer(normalization), selector))
return PandasColumnTransformer(transformers)
def test_column_selector():
X = pd.DataFrame({
"country": ["GB", "GB", "FR", "US"],
"city": ["London", "London", "Paris", "Sallisaw"],
"int": [5, 3, 4, 5],
})
ct = make_column_transformer(
(StandardScaler(), make_column_selector(dtype_include=np.number)),
(OneHotEncoder(), make_column_selector("city")),
)
expected = ct.fit_transform(X)
ct = make_column_transformer(
(StandardScaler(), ColumnSelector(AllNumeric())),
(OneHotEncoder(), ColumnSelector(StartsWith("c") & ~AnyOf("country"))),
)
actual = ct.fit_transform(X)
assert_array_equal(actual, expected)
def train_and_persist():
# Read in data into a Pandas DataFrame
df = pd.read_csv("hour.csv", parse_dates=["dteday"])
# Assign features to independent (X) and predicted (y) variables
X = df.drop(columns=["instant", "cnt", "casual", "registered"])
y = df["cnt"]
# using ffill_missing to make imputter with forward fill
ffiller = FunctionTransformer(ffill_missing)
# Make weather imputter pipeline for later use
weather_enc = make_pipeline(
ffiller,
OrdinalEncoder(handle_unknown="use_encoded_value",
unknown_value=X["weathersit"].nunique()),
)
# Make column transformer for imputtation and encoding process
ct = make_column_transformer(
(ffiller, make_column_selector(dtype_include=np.number)),
(weather_enc, ["weathersit"]),
)
# Make preprocessing object for Feature Engineering
preprocessing = FeatureUnion([("is_weekend",
FunctionTransformer(is_weekend)),
("year", FunctionTransformer(year)),
("column_transform", ct)])
# Define Pipeline to separate preprocessing and modelling
reg = Pipeline([("preprocessing", preprocessing),
("model", RandomForestRegressor())])
# Train, test split: Train is before 10/2012 and Test is after 10/2012
X_train, y_train = X.loc[X["dteday"] < "2012-10"], y.loc[
X["dteday"] < "2012-10"]
X_test, y_test = X.loc["2012-10" <= X["dteday"]], y.loc[
"2012-10" <= X["dteday"]]
# Train the model
reg.fit(X_train, y_train)
# # Evaluate to get R-squared
# reg.score(X_test, y_test)
# # Predict
# y_pred = reg.predict(X_test)
# Create the joblib file
joblib.dump(reg, "biking.joblib")
print("Model trained successfully")
def fit(self, X, y=None):
from sklearn.compose import ColumnTransformer
from sklearn.preprocessing import OrdinalEncoder
df = pd.DataFrame(data=X, index=range(X.shape[0]), columns=range(X.shape[1])).infer_objects()
categorical = make_column_selector(dtype_exclude=np.number)
self.estimator_ = ColumnTransformer(
[('ordinal', OrdinalEncoder(handle_unknown='use_encoded_value', unknown_value=-1), categorical)],
remainder='passthrough')
self.estimator_.fit(df, y)
return self