def build_doc2vec_model(self) -> None:
transformer = Doc2VecTransformer(vector_size=100,
window=10,
min_count=10,
dm=1)
transformer_name = ''
self.project_ids = [self.project_id] if self.project_id else []
if not self.project_ids:
self.project_ids = list(
self.queryset.values_list('project_id', flat=True).distinct())
if not self.project_ids:
error_msg = 'Document2VecFeatures has got no project_id and empty docs queryset'
self.log_message(error_msg)
raise RuntimeError(error_msg)
if not self.queryset:
self.queryset = \
TextUnitText.objects.filter(text_unit__unit_type=self.unit_type,
text_unit__document__project_id__in=self.project_ids)
model_builder_args = dict(project_ids=self.project_ids,
transformer_name=transformer_name)
model_builder = transformer.build_doc2vec_text_unit_model
doc2vec, trans_obj = model_builder(**model_builder_args)
self.transformer = trans_obj
def get_features(self) -> Features:
"""
Aggregator method to transform incoming queryset into features and indexes
"""
self.build_doc2vec_model() # type: gensim.models.doc2vec.Doc2Vec
data = self.queryset.values_list('text_unit_id', 'text')
vectors = Doc2VecTransformer.create_vectors(
self.transformer, data, TextUnitVector,
'text_unit_id') # type: List[TextUnitVector]
item_names = []
unqualified_item_ids = []
unqualified_item_names = []
for v in vectors:
unit_name = f'[{v.text_unit.location_start}:{v.text_unit.location_end}]'
item_names.append(unit_name)
# feature names could be words instead of just "f0" ... by tagging documents
# but this would require too much memory
columns = ['id'
] + [f'f{i}' for i in range(len(vectors[0].vector_value))]
vectors_indexed = [[v.text_unit.pk] + list(v.vector_value)
for v in vectors]
feature_df = pd.DataFrame(vectors_indexed, columns=columns)
feature_df.set_index('id', inplace=True)
res = Features(feature_df, item_names, unqualified_item_ids,
unqualified_item_names)
return res
def build_doc2vec_model(self) -> None:
transformer = Doc2VecTransformer(vector_size=100,
window=10,
min_count=10,
dm=1)
transformer_name = ''
self.project_ids = [self.project_id] \
if self.project_id and isinstance(self.project_id, int) else self.project_id or []
if not self.project_ids:
self.project_ids = list(
self.queryset.values_list('project_id', flat=True).distinct())
if not self.project_ids:
error_msg = 'Document2VecFeatures has got no project_id and empty docs queryset'
self.log_message(error_msg)
raise RuntimeError(error_msg)
if not self.queryset:
self.queryset = Document.objects.filter(
project_id__in=self.project_ids)
model_builder_args = dict(project_ids=self.project_ids,
transformer_name=transformer_name)
model_builder = transformer.build_doc2vec_document_model # source == 'document':
doc2vec, trans_obj = model_builder(**model_builder_args)
self.transformer = trans_obj
def get_features(self) -> Features:
"""
Aggregator method to transform incoming queryset into features and indexes
"""
self.build_doc2vec_model() # type: gensim.models.doc2vec.Doc2Vec
data = DocumentText.objects.filter(
document__project_id__in=self.project_ids).values_list(
'document_id', 'full_text')
vectors = Doc2VecTransformer.create_vectors(
self.transformer, data, DocumentVector,
'document_id') # type: List[DocumentVector]
item_names = []
unqualified_item_ids = []
unqualified_item_names = []
for v in vectors:
item_names.append(v.document.name)
# feature names could be words instead of just "f0" ... by tagging documents
# but this would require too much memory
columns = ['id'
] + [f'f{i}' for i in range(len(vectors[0].vector_value))]
vectors_indexed = [[v.document.pk] + list(v.vector_value)
for v in vectors]
feature_df = pd.DataFrame(vectors_indexed, columns=columns)
feature_df.set_index('id', inplace=True)
res = Features(feature_df, item_names, unqualified_item_ids,
unqualified_item_names)
return res
def process(self, **kwargs):
source = kwargs.get('source')
self.log_info('Going to train doc2vec model from {} objects...'.format(
source.upper()))
transformer_name = kwargs.get('transformer_name')
project_ids = kwargs.get('project_ids')
vector_size = kwargs.get('vector_size')
window = kwargs.get('window')
min_count = kwargs.get('min_count')
dm = kwargs.get('dm')
transformer = Doc2VecTransformer(vector_size=vector_size,
window=window,
min_count=min_count,
dm=dm)
model_builder_args = dict(project_ids=project_ids,
transformer_name=transformer_name)
if source == 'document':
model_builder = transformer.build_doc2vec_document_model
else:
model_builder = transformer.build_doc2vec_text_unit_model
model_builder_args['text_unit_type'] = kwargs.get('text_unit_type')
model_builder(**model_builder_args)
def get_vectors(self) -> List[DocumentVector]:
qs = self.get_queryset() # type: Document.objects
if self.feature_source == 'vector':
docs_wo_vectors = qs.exclude(documentvector__transformer=self.transformer)
if docs_wo_vectors.exists():
data = DocumentText.objects \
.filter(document__in=docs_wo_vectors) \
.values_list('document_id', 'full_text')
Doc2VecTransformer.create_vectors(
self.transformer, data, DocumentVector, 'document_id', save=True)
return list(DocumentVector.objects.filter(document__in=qs, transformer=self.transformer))
# self.feature_source == 'text'
transformer = self.build_doc2vec_model()
data = self.get_document_data(qs)
return Doc2VecTransformer.create_vectors(transformer, data, DocumentVector, 'document_id')
def get_vectors(self) -> List[TextUnitVector]:
qs = self.get_queryset() # type: TextUnit.objects
if self.feature_source == 'vector':
# this hangs forever
# tu_wo_vectors = qs.exclude(textunitvector__transformer=self.transformer)
tu_with_vectors = TextUnitVector.objects \
.filter(transformer=self.transformer, text_unit__in=qs) \
.values_list('text_unit_id', flat=True)
tu_wo_vectors = qs.exclude(id__in=tu_with_vectors)
if tu_wo_vectors.exists():
data = TextUnitText.objects \
.filter(text_unit__in=tu_wo_vectors) \
.values_list('text_unit_id', 'text')
Doc2VecTransformer.create_vectors(
self.transformer, data, TextUnitVector, 'text_unit_id', save=True)
return list(TextUnitVector.objects.filter(text_unit__in=qs))
# self.feature_source == 'text'
transformer = self.build_doc2vec_model()
data = TextUnitText.objects.filter(text_unit__in=qs).values_list('text_unit_id', 'text')
return Doc2VecTransformer.create_vectors(transformer, data, TextUnitVector, 'text_unit_id')
def save_feature_vectors(self):
model_class = DocumentTransformer if self.source == 'document' else TextUnitTransformer
vector_class = DocumentVector if self.source == 'document' else TextUnitVector
transformer = (self.transformer if hasattr(self, 'transformer') else None) or \
model_class.objects.get(pk=self.model_id)
id_field = 'document_id' if self.source == 'document' else 'text_unit_id'
if self.source == 'document':
data_query = DocumentText.objects.all()
if self.project_ids:
data_query = data_query.filter(
document__project_id__in=self.project_ids)
data = data_query.values_list(id_field, 'full_text')
else:
data_query = TextUnitText.objects.filter(
text_unit__unit_type=self.text_unit_type)
if self.project_ids:
data_query = data_query.filter(
text_unit__document__project_id__in=self.project_ids)
data = data_query.values_list(id_field, 'text')
if self.delete_existing:
data_ids = data_query.values_list(id_field, flat=True)
delete_query = vector_class.objects.all()
if self.source == 'document':
delete_query = delete_query.filter(document_id__in=data_ids)
else:
delete_query = delete_query.filter(text_unit_id__in=data_ids)
try:
delete_query.delete()
except Exception as e:
self.log_error('Error deleting existing records', exc_info=e)
raise
vectors = Doc2VecTransformer.create_vectors(
transformer, data, vector_class,
id_field) # type: List[BaseVector]
# save vectors
self.log_info(f'Saving {len(vectors)} vectors')
if not vectors:
return
try:
vector_class.objects.bulk_create(vectors, ignore_conflicts=True)
except Exception as e:
self.log_error(f'Error storing {vector_class.__name__}',
exc_info=e)
raise
def process(self, **kwargs):
self.source = kwargs.get('source')
transformer_class = DocumentTransformer if self.source == 'document' else TextUnitTransformer
self.log_info(
f'Training doc2vec model from {self.source.upper()} objects...')
transformer_name = kwargs.get('transformer_name')
if transformer_class.objects.filter(name=transformer_name).count() > 0:
raise RuntimeError(
f"There's already {transformer_class.__name__} with name '{transformer_name}'"
)
self.project_ids = kwargs.get('project_ids')
vector_size = kwargs.get('vector_size')
window = kwargs.get('window')
min_count = kwargs.get('min_count')
dm = kwargs.get('dm')
build_vectors = kwargs.get('build_vectors')
self.text_unit_type = kwargs.get(
'text_unit_type') or self.text_unit_type
transformer = Doc2VecTransformer(vector_size=vector_size,
window=window,
min_count=min_count,
dm=dm)
model_builder_args = dict(project_ids=self.project_ids,
transformer_name=transformer_name)
if self.source == 'document':
model_builder = transformer.build_doc2vec_document_model
else:
model_builder = transformer.build_doc2vec_text_unit_model
model_builder_args['text_unit_type'] = self.text_unit_type
_, transformer = model_builder(
**model_builder_args
) # gensim.models.doc2vec.Doc2Vec, BaseTransformer
self.transformer = transformer
if build_vectors:
self.save_feature_vectors()
def build_doc2vec_model(self) -> MLModel:
transformer = Doc2VecTransformer(vector_size=100, window=10, min_count=10, dm=1)
qs = self.get_queryset() # type: TextUnit.objects
_, trans_obj = transformer.build_doc2vec_text_unit_model(text_unit_qs=qs)
return trans_obj
def build_doc2vec_model(self) -> MLModel:
transformer = Doc2VecTransformer(vector_size=100, window=10, min_count=10, dm=1,
file_storage=self.file_storage)
qs = self.get_queryset() # type: Document.objects
_, trans_obj = transformer.build_doc2vec_document_model(document_qs=qs)
return trans_obj
