def std_scaler(trfm, col_names, **kwargs):
"""
Parameters
----------
trfm :
Contains the Sklearn's Standard Scaler preprocessing instance
col_names : list
Contains list of feature/column names.
The column names may represent the names of preprocessed attributes.
Returns
-------
pp_dict : dictionary
Returns a dictionary that contains attributes related to Standard Scaler preprocessing.
"""
derived_flds = list()
pp_dict = dict()
if is_present("labelBinarizer",col_names):
derived_flds_hidden = kwargs['derived_fld']
if derived_flds_hidden:
derived_flds.extend(derived_flds_hidden)
derived_colnames = get_derived_colnames('standardScaler', col_names)
for col_name_idx in range(len(col_names)):
apply_inner = list()
apply_inner.append(pml.Apply(
function='-',
Constant=[pml.Constant(
dataType="double", # <---------------------
valueOf_=unround_scalers(trfm.mean_[col_name_idx])
)],
FieldRef=[pml.FieldRef(field=col_names[col_name_idx])]
))
apply_outer = pml.Apply(
Apply_member=apply_inner,
function='/',
Constant=[pml.Constant(
dataType="double", # <----------------------------
valueOf_=unround_scalers(trfm.scale_[col_name_idx])
)]
)
derived_flds.append(pml.DerivedField(
Apply=apply_outer,
name=derived_colnames[col_name_idx],
optype="continuous",
dataType="double"
))
pp_dict['der_fld'] = derived_flds
pp_dict['der_col_names'] = derived_colnames
return pp_dict
def rbst_scaler(trfm, col_names):
"""
Parameters
----------
trfm :
Contains the Sklearn's RobustScaler preprocessing instance
col_names : list
Contains list of feature/column names.
The column names may represent the names of preprocessed attributes.
Returns
-------
pp_dict : dictionary
Returns a dictionary that contains attributes related to RobustScaler preprocessing.
"""
pp_dict = dict()
derived_flds = list()
derived_colnames = get_derived_colnames('robustScaler', col_names)
for col_name_idx in range(len(col_names)):
if (col_names[col_name_idx] not in exception_cols):
apply_inner = list()
apply_inner.append(pml.Apply(
function='-',
Constant=[pml.Constant(
dataType="double", # <---------------------
valueOf_=unround_scalers(trfm.center_[col_name_idx])
)],
FieldRef=[pml.FieldRef(field=col_names[col_name_idx])],
Extension=[pml.Extension(name='scaling', anytypeobjs_=['RobustScaler'])]
))
apply_outer = pml.Apply(
Apply_member=apply_inner,
function='/',
Constant=[pml.Constant(
dataType="double", # <----------------------------
valueOf_=unround_scalers(trfm.scale_[col_name_idx])
)]
)
derived_flds.append(pml.DerivedField(
Apply=apply_outer,
name=derived_colnames[col_name_idx],
optype="continuous",
dataType="double"
))
pp_dict['der_fld'] = derived_flds
pp_dict['der_col_names'] = derived_colnames
return pp_dict
def min_max_scaler(trfm, col_names):
"""
Parameters
----------
trfm :
Contains the Sklearn's MinMaxScaler preprocessing instance
col_names : list
Contains list of feature/column names.
The column names may represent the names of preprocessed attributes.
Returns
-------
pp_dict : dictionary
Returns a dictionary that contains attributes related to MinMaxScaler preprocessing.
"""
pp_dict = dict()
derived_flds = list()
# col_names = list(filter(lambda x: x not in exception_cols, col_names))
derived_colnames = get_derived_colnames("minMaxScaler", col_names)
for col_name_idx in range(len(col_names)):
if(col_names[col_name_idx] not in exception_cols):
apply_inner = list()
apply_inner.append(pml.Apply(
function='*',
Constant=[pml.Constant(
dataType="double",
valueOf_=unround_scalers(trfm.scale_[col_name_idx])
)],
FieldRef=[pml.FieldRef(field=col_names[col_name_idx])]
))
apply_outer = pml.Apply(
Apply_member=apply_inner,
function='+',
Constant=[pml.Constant(
dataType="double",
valueOf_=unround_scalers(trfm.min_[col_name_idx])
)]
)
derived_flds.append(pml.DerivedField(
Apply=apply_outer,
name=derived_colnames[col_name_idx],
optype="continuous",
dataType="double"
))
pp_dict['der_fld'] = derived_flds
pp_dict['der_col_names'] = derived_colnames
return pp_dict
def pca(trfm, col_names):
"""
Parameters
----------
trfm :
Contains the Sklearn's PCA preprocessing instance
col_names : list
Contains list of feature/column names.
The column names may represent the names of preprocessed attributes.
Returns
-------
pp_dict : dictionary
Returns a dictionary that contains attributes related to PCA preprocessing.
"""
pca.counter += 1
pp_dict = dict()
derived_flds = list()
derived_colnames = list()
val = trfm.mean_
zero = 0.0
for preprocess_idx in range(trfm.n_components):
add = list()
for pca_idx in range(trfm.n_features_):
apply_inner = pml.Apply(function='-',
Constant=[pml.Constant(dataType="double",
valueOf_=val[pca_idx])],
FieldRef=[pml.FieldRef(field=col_names[pca_idx])])
apply_outer = pml.Apply(function="*",
Apply_member=[apply_inner],
Constant=[pml.Constant(dataType="double",
valueOf_=zero if trfm.components_[preprocess_idx][
pca_idx] == 0.0 else
trfm.components_[preprocess_idx][pca_idx])])
add.append(apply_outer)
app0 = pml.Apply(function="sum", Apply_member=add)
derived_flds.append(pml.DerivedField(Apply=app0,
dataType="double",
optype="continuous",
name="PCA" + str(pca.counter) + "-" + str(preprocess_idx)))
name = derived_flds[preprocess_idx].get_name()
derived_colnames.append(name)
pp_dict['der_fld'] = derived_flds
pp_dict['der_col_names'] = derived_colnames
return pp_dict
def tfidf_vectorizer(trfm, col_names):
"""
Parameters
----------
trfm :
Contains the Sklearn's TfIdfVectorizer preprocessing instance
col_names : list
Contains list of feature/column names.
The column names may represent the names of preprocessed attributes.
Returns
-------
pp_dict : dictionary
Returns a dictionary that contains attributes related to TfIdfVectorizer preprocessing.
"""
pp_dict = dict()
features = trfm.get_feature_names()
idfs = trfm.idf_
extra_features = list(trfm.vocabulary_.keys())
derived_flds = list()
derived_colnames = get_derived_colnames('tfidf@[' + col_names[0] + ']', features)
derived_flds.append(
pml.DerivedField(name='lowercase(' + col_names[0] + ')',
optype='categorical', dataType='string',
Apply=pml.Apply(function='lowercase',
FieldRef=[pml.FieldRef(field=col_names[0])])))
for feat_idx, idf in zip(range(len(features)), idfs):
derived_flds.append(pml.DerivedField(
name=derived_colnames[feat_idx],
optype='continuous',
dataType='double',
Apply=pml.Apply(function='*',
TextIndex=[pml.TextIndex(textField='lowercase(' + col_names[0] + ')',
wordSeparatorCharacterRE='\s+',
tokenize='true',
Constant=pml.Constant(valueOf_=features[feat_idx]),
Extension=[pml.Extension(anytypeobjs_=[extra_features[feat_idx]])])],
Constant=[pml.Constant(valueOf_=idf)])
))
pp_dict['der_fld'] = derived_flds
pp_dict['der_col_names'] = derived_colnames
pp_dict['pp_feat_name'] = col_names[0]
pp_dict['pp_feat_class_lbl'] = list()
return pp_dict
def polynomial_features(trfm, col_names):
"""
Parameters
----------
trfm :
Contains the Sklearn's PolynomialFeatures preprocessing instance.
col_names : list
Contains list of feature/column names.
The column names may represent the names of preprocessed attributes.
Returns
-------
pp_dict : dictionary
Returns a dictionary that contains attributes related to PolynomialFeatures preprocessing.
"""
polynomial_features.poly_ctr += 1
pp_dict = dict()
derived_flds = []
derived_colnames = []
for polyfeat_idx in range(trfm.powers_.shape[0]):
apply_inner_container = []
for col_name_idx in range(len(col_names)):
val = int(trfm.powers_[polyfeat_idx][col_name_idx])
apply_inner = pml.Apply(
function='pow',
Constant=[pml.Constant(
dataType="integer",
valueOf_=val
)],
FieldRef=[pml.FieldRef(field=col_names[col_name_idx])])
apply_inner_container.append(apply_inner)
apply_outer = pml.Apply(function="product",
Apply_member=apply_inner_container
)
derived_flds.append(pml.DerivedField(
Apply=apply_outer,
dataType="double",
optype="continuous",
name="poly" + str(polynomial_features.poly_ctr) + '-' + "x" + str(polyfeat_idx)
))
name = derived_flds[polyfeat_idx].get_name()
derived_colnames.append(name)
pp_dict['der_fld'] = derived_flds
pp_dict['der_col_names'] = derived_colnames
return pp_dict
def binarizer(trfm, col_names):
"""
Parameters
----------
trfm :
Contains the Sklearn's Binarizer preprocessing instance.
col_names : list
Contains list of feature/column names.
The column names may represent the names of preprocessed attributes.
Returns
-------
pp_dict : dictionary
Returns a dictionary that contains attributes related to Binarizer preprocessing.
"""
pp_dict = dict()
derived_flds = list()
derived_colnames = get_derived_colnames("binarizer", col_names)
for col_name_idx in range(len(col_names)):
apply_outer = pml.Apply(
function='threshold',
Constant=[pml.Constant(
dataType="double",
valueOf_=trfm.threshold
)],
FieldRef=[pml.FieldRef(field=col_names[col_name_idx])])
derived_flds.append(pml.DerivedField(
Apply=apply_outer,
name=derived_colnames[col_name_idx],
optype="continuous",
dataType="double"
))
pp_dict['der_fld'] = derived_flds
pp_dict['der_col_names'] = derived_colnames
return pp_dict
def imputer(trfm, col_names, **kwargs):
"""
Parameters
----------
trfm :
Contains the Sklearn's Imputer preprocessing instance
col_names : list
Contains list of feature/column names.
The column names may represent the names of preprocessed attributes.
Returns
-------
pp_dict : dictionary
Returns a dictionary that contains attributes related to Imputer preprocessing.
"""
original_col_names = imputer.col_names
derived_colnames = col_names
pp_dict = dict()
derived_flds = list()
model = kwargs['model']
mining_strategy = trfm.strategy
if "mean" in mining_strategy:
mining_strategy = "asMean"
elif "median" in mining_strategy:
mining_strategy = "asMedian"
elif "most_frequent" in mining_strategy:
mining_strategy = "asMode"
mining_replacement_val = trfm.statistics_
if not any_in(original_col_names, col_names):
derived_colnames = get_derived_colnames('imputer', col_names)
for col_name_idx in range(len(col_names)):
if (col_names[col_name_idx] not in exception_cols):
const_list = list()
apply_inner = list()
apply_inner.append(pml.Apply(function='isMissing', FieldRef=[pml.FieldRef(field=col_names[col_name_idx])]))
const_obj = pml.Constant(
dataType="double", # <---------------------
valueOf_=mining_replacement_val[col_name_idx]
),
fieldref_obj = pml.FieldRef(field=col_names[col_name_idx])
fieldref_obj.original_tagname_ = "FieldRef"
const_list.append(const_obj[0])
const_list.append(fieldref_obj)
apply_outer = pml.Apply(
Apply_member=apply_inner,
function='if',
Constant=const_list
)
derived_flds.append(pml.DerivedField(
Apply=apply_outer,
name=derived_colnames[col_name_idx],
optype="continuous",
dataType="double"
))
else:
pp_dict['mining_strategy'] = mining_strategy
pp_dict['mining_replacement_val'] = mining_replacement_val
pp_dict['mining_attributes'] = col_names
pp_dict['der_fld'] = derived_flds
pp_dict['der_col_names'] = derived_colnames
return pp_dict