def weka_local_generic_learner(input_dict):
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass(input_dict['weka_class'])()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'Generic_Weka_learner': sclassifier}
def weka_local_generic_learner(input_dict):
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass(input_dict['weka_class'])()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'Generic_Weka_learner': sclassifier}
def weka_local_libsvm(input_dict):
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.LibSVM')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'LibSVM_learner': sclassifier}
def weka_local_arff_to_weka_instances(input_dict):
'''
Reads a dataset into a format suitable for WEKA methods
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
tmp = common.TemporaryFile(suffix='.arff')
tmp.writeString(input_dict['arff'])
try:
class_index = int(input_dict['class_index'])
except:
class_index = None
source = jp.JClass('weka.core.converters.ConverterUtils$DataSource')(
tmp.name)
instances = source.getDataSet()
if class_index is None:
print 'Warning: class is set to the last attribute!'
class_index = instances.numAttributes() - 1
elif class_index == -1:
class_index = instances.numAttributes() - 1
instances.setClassIndex(class_index)
return {'instances': common.serialize_weka_object(instances)}
def weka_local_libsvm(input_dict):
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.LibSVM')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'LibSVM_learner': sclassifier}
def weka_local_arff_to_weka_instances(input_dict):
'''
Reads a dataset into a format suitable for WEKA methods
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
tmp = common.TemporaryFile(suffix='.arff')
tmp.writeString(input_dict['arff'])
try:
class_index = int(input_dict['class_index'])
except:
class_index = None
source = jp.JClass('weka.core.converters.ConverterUtils$DataSource')(tmp.name)
instances = source.getDataSet()
if class_index is None:
print 'Warning: class is set to the last attribute!'
class_index = instances.numAttributes() - 1
elif class_index == -1:
class_index = instances.numAttributes() - 1
instances.setClassIndex(class_index)
return {'instances': common.serialize_weka_object(instances)}
def weka_local_multilayer_perceptron(input_dict):
'''Feedforward artificial neural network, using backpropagation to classify instances
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.MultilayerPerceptron')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'Multilayer_Perceptron_learner': sclassifier}
def weka_local_smo(input_dict):
'''A support vector classifier, trained using the Sequential Minimal Optimization (SMO) algorithm
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.SMO')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'SMO_learner': sclassifier}
def weka_local_multilayer_perceptron(input_dict):
'''Feedforward artificial neural network, using backpropagation to classify instances
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.MultilayerPerceptron')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'Multilayer_Perceptron_learner': sclassifier}
def weka_local_random_forest(input_dict):
'''Random Forest learner by Weka
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.RandomForest')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'RandomForest_learner': sclassifier}
def weka_local_k_star(input_dict):
'''Instance-Based learner K* by Weka
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.lazy.KStar')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'KStar_learner': sclassifier}
def weka_local_naive_bayes(input_dict):
'''Naive Bayes classifier provided by Weka. Naive Bayes is a simple probabilistic classifier based on applying the Bayes' theorem.
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.bayes.NaiveBayes')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'Naive_Bayes_learner': sclassifier}
def weka_local_k_star(input_dict):
'''Instance-Based learner K* by Weka
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.lazy.KStar')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'KStar_learner': sclassifier}
def weka_local_random_forest(input_dict):
'''Random Forest learner by Weka
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.RandomForest')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'RandomForest_learner': sclassifier}
def weka_local_naive_bayes(input_dict):
'''Naive Bayes classifier provided by Weka. Naive Bayes is a simple probabilistic classifier based on applying the Bayes' theorem.
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.bayes.NaiveBayes')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'Naive_Bayes_learner': sclassifier}
def weka_local_smo(input_dict):
'''A support vector classifier, trained using the Sequential Minimal Optimization (SMO) algorithm
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.SMO')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'SMO_learner': sclassifier}
def weka_local_zeror(input_dict):
'''Weka's rulesZeroR classifier: predicts the mean (for a numeric class) or the mode (for a nominal class).
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.rules.ZeroR')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'classifier': sclassifier}
def weka_local_jrip(input_dict):
'''The RIPPER rule learner by Weka
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.rules.JRip')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'JRip_learner': sclassifier}
def weka_local_rep_tree(input_dict):
'''A REP Tree, which is a fast decision tree learner. Builds a decision/regression tree using information gain/variance and prunes it using reduced-error pruning
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.REPTree')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'REPTree_learner': sclassifier}
def weka_local_rep_tree(input_dict):
'''A REP Tree, which is a fast decision tree learner. Builds a decision/regression tree using information gain/variance and prunes it using reduced-error pruning
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.REPTree')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'REPTree_learner': sclassifier}
def weka_local_zeror(input_dict):
'''Weka's rulesZeroR classifier: predicts the mean (for a numeric class) or the mode (for a nominal class).
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.rules.ZeroR')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'classifier': sclassifier}
def weka_local_jrip(input_dict):
'''The RIPPER rule learner by Weka
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.rules.JRip')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'JRip_learner': sclassifier}
def weka_local_j48(input_dict):
'''Weka decision tree learner J48
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.J48')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'J48_learner': sclassifier}
def weka_local_j48(input_dict):
'''Weka decision tree learner J48
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.J48')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'J48_learner': sclassifier}
def weka_local_ibk(input_dict):
'''K-nearest neighbours classifier by Weka
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.lazy.IBk')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'IBk_learner': sclassifier}
def weka_local_random_tree(input_dict):
'''A tree that considers K randomly chosen attributes at each node, and performs no pruning
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.RandomTree')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'RandomTree_learner': sclassifier}
def weka_local_random_tree(input_dict):
'''A tree that considers K randomly chosen attributes at each node, and performs no pruning
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.RandomTree')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'RandomTree_learner': sclassifier}
def weka_local_ibk(input_dict):
'''K-nearest neighbours classifier by Weka
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.lazy.IBk')()
model.setOptions(common.parse_options(input_dict['params']))
sclassifier = common.serialize_weka_object(model)
return {'IBk_learner': sclassifier}
def k_star(params=None):
'''Instance-Based learner K* by Weka
:param params: parameters in textual form to pass to the KStar Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.lazy.KStar')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def k_star(params=None):
'''Instance-Based learner K* by Weka
:param params: parameters in textual form to pass to the KStar Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.lazy.KStar')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def random_forest(params=None):
'''Random Forest learner by Weka
:param params: parameters in textual form to pass to the RandomForest Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.RandomForest')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def rep_tree(params=None):
'''A REP Tree, which is a fast decision tree learner. Builds a decision/regression tree using information gain/variance and prunes it using reduced-error pruning
:param params: parameters in textual form to pass to the REPTree Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.REPTree')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def random_forest(params=None):
'''Random Forest learner by Weka
:param params: parameters in textual form to pass to the RandomForest Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.RandomForest')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def naive_bayes(params=None):
'''Naive Bayes classifier provided by Weka. Naive Bayes is a simple probabilistic classifier based on applying the Bayes' theorem.
:param params: parameters in textual form to pass to the NaiveBayes Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.bayes.NaiveBayes')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def rep_tree(params=None):
'''A REP Tree, which is a fast decision tree learner. Builds a decision/regression tree using information gain/variance and prunes it using reduced-error pruning
:param params: parameters in textual form to pass to the REPTree Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.REPTree')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def rules_jrip(params=None):
'''The RIPPER rule learner by Weka
:param params: parameters in textual form to pass to the JRip Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.rules.JRip')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def rules_zeror(params=None):
'''Weka's rulesZeroR classifier: predicts the mean (for a numeric class) or the mode (for a nominal class).
:param params: parameters in textual form to pass to the rulesZeroR Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.rules.ZeroR')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def ibk(params=None):
'''K-nearest neighbours classifier by Weka
:param params: parameters in textual form to pass to the IBk Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.lazy.IBk')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def logistic(params=None):
'''Logistic regression by Weka
:param params: parameters in textual form to pass to the Logistic Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.Logistic')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def smo(params=None):
'''A support vector classifier, trained using the Sequential Minimal Optimization (SMO) algorithm
:param params: parameters in textual form to pass to the SMO Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.SMO')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def naive_bayes(params=None):
'''Naive Bayes classifier provided by Weka. Naive Bayes is a simple probabilistic classifier based on applying the Bayes' theorem.
:param params: parameters in textual form to pass to the NaiveBayes Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.bayes.NaiveBayes')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def multilayer_perceptron(params=None):
'''Feedforward artificial neural network, using backpropagation to classify instances
:param params: parameters in textual form to pass to the MultilayerPerceptron Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.MultilayerPerceptron')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def rules_zeror(params=None):
'''Weka's rulesZeroR classifier: predicts the mean (for a numeric class) or the mode (for a nominal class).
:param params: parameters in textual form to pass to the rulesZeroR Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.rules.ZeroR')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def rules_jrip(params=None):
'''The RIPPER rule learner by Weka
:param params: parameters in textual form to pass to the JRip Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.rules.JRip')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def random_tree(params=None):
'''A tree that considers K randomly chosen attributes at each node, and performs no pruning
:param params: parameters in textual form to pass to the RandomTree Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.RandomTree')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def logistic(params=None):
'''Logistic regression by Weka
:param params: parameters in textual form to pass to the Logistic Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.Logistic')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def ibk(params=None):
'''K-nearest neighbours classifier by Weka
:param params: parameters in textual form to pass to the IBk Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.lazy.IBk')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def smo(params=None):
'''A support vector classifier, trained using the Sequential Minimal Optimization (SMO) algorithm
:param params: parameters in textual form to pass to the SMO Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.SMO')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def multilayer_perceptron(params=None):
'''Feedforward artificial neural network, using backpropagation to classify instances
:param params: parameters in textual form to pass to the MultilayerPerceptron Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.functions.MultilayerPerceptron')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def random_tree(params=None):
'''A tree that considers K randomly chosen attributes at each node, and performs no pruning
:param params: parameters in textual form to pass to the RandomTree Weka class
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.RandomTree')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def j48(params=None):
'''Weka decision tree learner J48
:param params: parameters in textual form to pass to the J48 Weka class (e.g. "-C 0.25 -M 2")
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.J48')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def j48(params=None):
'''Weka decision tree learner J48
:param params: parameters in textual form to pass to the J48 Weka class (e.g. "-C 0.25 -M 2")
:return: a WekaClassifier object
'''
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
model = jp.JClass('weka.classifiers.trees.J48')()
model.setOptions(common.parse_options(params))
return WekaClassifier(common.serialize_weka_object(model))
def weka_local_build_classifier(input_dict):
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
instances = common.deserialize_weka_object(input_dict['instances'])
classifier = common.deserialize_weka_object(input_dict['learner'])
if instances.classIndex() == -1:
instances.setClassIndex(instances.numAttributes() - 1)
# raise ValueError('Class not set!')
classifier.buildClassifier(instances)
sclassifier = common.serialize_weka_object(classifier)
return {'classifier': sclassifier}
def weka_local_build_classifier(input_dict):
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
instances = common.deserialize_weka_object(input_dict['instances'])
classifier = common.deserialize_weka_object(input_dict['learner'])
if instances.classIndex() == -1:
instances.setClassIndex(instances.numAttributes() - 1)
# raise ValueError('Class not set!')
classifier.buildClassifier(instances)
sclassifier = common.serialize_weka_object(classifier)
return {'classifier': sclassifier}
def build_classifier(self, data):
"""Builds a classifier
:param data: bunch
"""
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
instances = ut.convert_bunch_to_weka_instances(data)
classifier = common.deserialize_weka_object(self.sclassifier)
if instances.classIndex() == -1:
instances.setClassIndex(instances.numAttributes() - 1)
# raise ValueError('Class not set!')
classifier.buildClassifier(instances)
self.sclassifier = common.serialize_weka_object(classifier)
def build_classifier(self, data):
"""Builds a classifier
:param data: bunch
"""
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
instances = ut.convert_bunch_to_weka_instances(data)
classifier = common.deserialize_weka_object(self.sclassifier)
if instances.classIndex() == -1:
instances.setClassIndex(instances.numAttributes() - 1)
# raise ValueError('Class not set!')
classifier.buildClassifier(instances)
self.sclassifier = common.serialize_weka_object(classifier)
def weka_local_apply_mapped_classifier_get_instances(input_dict):
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
MAPPING_REPORT_START = 'Attribute mappings:'
classifier = common.deserialize_weka_object(input_dict['classifier'])
original_training_instances = common.deserialize_weka_object(
input_dict['original_training_instances'])
instances = common.deserialize_weka_object(input_dict['instances'])
# serialize classifier with original instances to a file once again for the Mapped classifier
tfile = common.TemporaryFile(flags='wb+')
s = jp.JClass('weka.core.SerializationHelper')
s.writeAll(tfile.name, [classifier, original_training_instances])
# construct a MappedClassifier
mappedClassifier = jp.JClass(
'weka.classifiers.misc.InputMappedClassifier')()
mappedClassifier.setIgnoreCaseForNames(True)
mappedClassifier.setTrim(True)
#mappedClassifier.setSuppressMappingReport(True)
#mc.setModelHeader(original_training_instances)
mappedClassifier.setModelPath(tfile.name)
# use the mapped classifier on new data
classIndex = instances.classIndex()
if classIndex == -1:
raise ValueError('Class not set!')
classAttribute = instances.classAttribute()
for instance in instances:
label = int(mappedClassifier.classifyInstance(instance))
instance.setClassValue(classAttribute.value(label))
report = mappedClassifier.toString()
if MAPPING_REPORT_START in report:
report = report[report.index(MAPPING_REPORT_START):]
return {
'mapping_report': report,
'instances': common.serialize_weka_object(instances)
}
def weka_local_apply_classifier_and_get_instances(input_dict):
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
# print("Instances: %s" % type(input_dict['instances']))
instances = common.deserialize_weka_object(input_dict['instances'])
if instances.classIndex() == -1:
instances.setClassIndex(instances.numAttributes() - 1) # last attribute is class
classifier_serialized = input_dict['classifier']
try:
classifier = common.deserialize_weka_object(classifier_serialized)
classAttribute = instances.classAttribute()
for instance in instances:
label_ind = int(classifier.classifyInstance(instance))
instance.setClassValue(classAttribute.value(label_ind))
return {'instances': common.serialize_weka_object(instances)}
except:
raise Exception("Classifier not built. Please use the Build Classifier widget first.")
def weka_local_apply_mapped_classifier_get_instances(input_dict):
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
MAPPING_REPORT_START = 'Attribute mappings:'
classifier = common.deserialize_weka_object(input_dict['classifier'])
original_training_instances = common.deserialize_weka_object(input_dict['original_training_instances'])
instances = common.deserialize_weka_object(input_dict['instances'])
# serialize classifier with original instances to a file once again for the Mapped classifier
tfile = common.TemporaryFile(flags='wb+')
s = jp.JClass('weka.core.SerializationHelper')
s.writeAll(tfile.name, [classifier, original_training_instances])
# construct a MappedClassifier
mappedClassifier = jp.JClass('weka.classifiers.misc.InputMappedClassifier')()
mappedClassifier.setIgnoreCaseForNames(True)
mappedClassifier.setTrim(True)
#mappedClassifier.setSuppressMappingReport(True)
#mc.setModelHeader(original_training_instances)
mappedClassifier.setModelPath(tfile.name)
# use the mapped classifier on new data
classIndex = instances.classIndex()
if classIndex == -1:
raise ValueError('Class not set!')
classAttribute = instances.classAttribute()
for instance in instances:
label = int(mappedClassifier.classifyInstance(instance))
instance.setClassValue(classAttribute.value(label))
report = mappedClassifier.toString()
if MAPPING_REPORT_START in report:
report = report[report.index(MAPPING_REPORT_START):]
return {'mapping_report':report, 'instances':common.serialize_weka_object(instances)}
def weka_local_apply_classifier_and_get_instances(input_dict):
if not jp.isThreadAttachedToJVM():
jp.attachThreadToJVM()
# print("Instances: %s" % type(input_dict['instances']))
instances = common.deserialize_weka_object(input_dict['instances'])
if instances.classIndex() == -1:
instances.setClassIndex(instances.numAttributes() -
1) # last attribute is class
classifier_serialized = input_dict['classifier']
try:
classifier = common.deserialize_weka_object(classifier_serialized)
classAttribute = instances.classAttribute()
for instance in instances:
label_ind = int(classifier.classifyInstance(instance))
instance.setClassValue(classAttribute.value(label_ind))
return {'instances': common.serialize_weka_object(instances)}
except:
raise Exception(
"Classifier not built. Please use the Build Classifier widget first."
)