def train_classifier():
classifier = DocumentClassifier()
try:
# load the classifier, since we might not have to train it again.
classifier.reload()
except (OSError, EOFError, IncompatibleClassifierVersionError):
# This is what we're going to fix here.
classifier = DocumentClassifier()
try:
if classifier.train():
logging.getLogger(__name__).info(
"Saving updated classifier model to {}...".format(
settings.MODEL_FILE)
)
classifier.save_classifier()
else:
logging.getLogger(__name__).debug(
"Training data unchanged."
)
except Exception as e:
logging.getLogger(__name__).error(
"Classifier error: " + str(e)
)
def testSaveClassifier(self):
self.generate_test_data()
self.classifier.train()
self.classifier.save_classifier()
new_classifier = DocumentClassifier()
new_classifier.reload()
self.assertFalse(new_classifier.train())
def testReload(self):
self.generate_test_data()
self.assertTrue(self.classifier.train())
self.classifier.save_classifier()
classifier2 = DocumentClassifier()
classifier2.reload()
v1 = classifier2.classifier_version
# change the classifier after some time.
sleep(1)
self.classifier.save_classifier()
classifier2.reload()
v2 = classifier2.classifier_version
self.assertNotEqual(v1, v2)
def handle(self, *args, **options):
self.verbosity = options["verbosity"]
if options["inbox_only"]:
queryset = Document.objects.filter(tags__is_inbox_tag=True)
else:
queryset = Document.objects.all()
documents = queryset.distinct()
classifier = DocumentClassifier()
try:
classifier.reload()
except (OSError, EOFError, IncompatibleClassifierVersionError) as e:
logging.getLogger(__name__).warning(
f"Cannot classify documents: {e}.")
classifier = None
for document in documents:
logging.getLogger(__name__).info(
f"Processing document {document.title}")
if options['correspondent']:
set_correspondent(sender=None,
document=document,
classifier=classifier,
replace=options['overwrite'],
use_first=options['use_first'])
if options['document_type']:
set_document_type(sender=None,
document=document,
classifier=classifier,
replace=options['overwrite'],
use_first=options['use_first'])
if options['tags']:
set_tags(sender=None,
document=document,
classifier=classifier,
replace=options['overwrite'])
def testVersionIncreased(self):
self.generate_test_data()
self.assertTrue(self.classifier.train())
self.assertFalse(self.classifier.train())
self.classifier.save_classifier()
classifier2 = DocumentClassifier()
current_ver = DocumentClassifier.FORMAT_VERSION
with mock.patch(
"documents.classifier.DocumentClassifier.FORMAT_VERSION",
current_ver + 1):
# assure that we won't load old classifiers.
self.assertRaises(IncompatibleClassifierVersionError,
classifier2.reload)
self.classifier.save_classifier()
# assure that we can load the classifier after saving it.
classifier2.reload()
