def get_corpus(wiki_raw_filename, token_version, dictionary):
nbprint('Loading Corpus')
wiki_raw_path = join(config.paths["rawdata"], 'wiki/' + wiki_raw_filename)
tokenizer_func = get_tokenizer_func(token_version).tokenize
return WikiCorpus(wiki_raw_path,
dictionary=dictionary,
tokenizer_func=tokenizer_func)
def run(self):
# Set the NLTK path (http://www.nltk.org/_modules/nltk/data.html)
nltk_path.append(join(config.paths["rawdata"], "nltk"))
try:
# Check which classes are valid depending on min_docs_per_class
nbprint('Loading classes')
self.load_valid_classes()
# Load the documents
with data.document_writer(self.info) as document_writer:
# Initialize info classes
self.classinfo = ClassInfo()
self.docinfo = DocumentInfo(document_writer)
# Load documents and store class information in classinfo
self.load_documents()
# Print Meta Information
self.docinfo.save_meta(self.info)
self.classinfo.save_meta(self.info)
except (LookupError, FileNotFoundError):
raise ImporterError(
info,
'Directory "{}" does not contain the required corpus.'.format(
nltk_path))
# Save the classes
classes = self.classinfo.make_class_list()
data.save_classes(classes, self.info)
def coherence_metrics():
metric_fcts = load_metric_fcts('coherence')
if len(metric_fcts) == 0:
nbprint('No metrics active.')
return
topiclist_infos = data.get_all_topiclist_infos()
if len(topiclist_infos) == 0:
nbprint('No topics found.')
return
# Group them into batches based on topic_version and add num_tokens
topiclist_info_batches = defaultdict(list)
for info in topiclist_infos:
for num_tokens in config.metrics['num_tokens']:
extended_info = info.copy()
extended_info['num_tokens'] = num_tokens
if 'second_info' in info:
token_version = info['second_info']['token_version']
else:
token_version = info['token_version']
topiclist_info_batches[token_version].append(extended_info)
for token_version, batch in topiclist_info_batches.items():
nbprint('Batch {}'.format(token_version)).push()
for metric_id, fct in metric_fcts.items():
start = time.time()
nbprint('Metric: {}'.format(
config.metrics['coherence'][metric_id]['name'])).push()
coherence_metric_batch(token_version, batch, metric_id, fct)
end = time.time()
nbprint('Runtime: {} minutes'.format((end - start) / 60)).pop()
nbprint.pop()
def filter_total_size(info, runvars):
max_tokens = get_option(info, 'max_tokens')
if max_tokens:
old_length = len(runvars['counts'])
runvars['counts'][:] = runvars['counts'][:max_tokens]
nbprint('Removed {} tokens to limit vocabulary size to {}'.format(
old_length - len(runvars['counts']), max_tokens))
def _run(self, info):
nbprint('Running k-means')
model = KMeansSklearn(n_clusters=info["num_topics"],
init='k-means++',
random_state=42,
verbose=0)
self.c = model.fit_predict(self.input_mat.transpose())
def make_term_doc_mat_count(info, runvars):
counts, i, j, mat_ids = [], [], [], []
idx, excluded = 0, 0
vocab = data.load_vocab_dict(info)
with data.tokenized_document_reader(info) as documents:
for document in ProgressIterator(documents, 'Documents'):
tokens = split_tokens(document['tokens'])
tokencnt = Counter(tokens).most_common()
num_tokens = 0
for token, count in tokencnt:
if token in vocab:
counts.append(count)
i.append(vocab[token]['id'])
j.append(idx)
num_tokens += count
if num_tokens > 0:
idx += 1
mat_ids.append(document['id'])
else:
excluded += 1
nbprint("Documents {}, Excluded {} empty documents".format(idx, excluded))
term_doc_mat_shape = (len(vocab), idx)
runvars['term_doc_mat_count'] = sparse.coo_matrix(
(counts, (i, j)), shape=term_doc_mat_shape).tocsc()
runvars['mat_ids'] = mat_ids
def _run(self, info):
self.info = info
# Settings
self.num_topics = self.info["num_topics"]
# ALgorithm for optimizing over the nullspace
self.null = self.info["model_info"].get('null', None)
# Minimum number of iterations
self.min_iter = info['model_info'].get('min_iter', 15)
# Maximum number of iterations
self.max_iter = info['model_info'].get('max_iter', 100)
# Mimum value of W and H entries, small positive value for stability
self.eps = info['model_info'].get('eps', 1e-16)
# How often does W get updated each iteration
self.W_update_num = info['model_info'].get('W_update_num', 2)
# How often does H get updated each iteration
self.H_update_num = info['model_info'].get('H_update_num', 1)
# If the mean of the relative differences between two iterates falls below this threshold, the algorithm stops
self.threshold = info['model_info'].get('threshold', 1e-3)
# If all c values are below c_threshold in one iteration, the iterations stop (original NMF)
self.c_threshold = info['model_info'].get('c_threshold', 1e-8)
# Kernel elements used for nullspace updates
self.num_kernel = info['model_info'].get('num_kernel', 20)
# Compute and log error after each iteration
self.log_error = info['model_info'].get('log_error', False)
# Compute and print error after each iteration
self.print_error = info['model_info'].get('print_error', False)
self._pre_algorithm()
nbprint('WeNMFN')
self._wenmf()
self.meta = {'errors': self.errors}
def load_documents(self):
nbprint('Loading xml file')
self.documents = []
filename = join(config.paths["rawdata"], "yahooL5/manner.xml")
#i, max = 0, 100000
current_doc = None
for event, elem in etree.iterparse(filename,
events=('start', 'end'),
recover=True):
#i = i+1
#if i % math.floor(max/10) == 0:
# print(i/max)
#if i > max:
# break;
if elem.tag == "document":
if event == "start":
current_doc = Document()
elif event == "end":
if current_doc.complete():
self.documents.append(current_doc)
current_doc = None
elif event == "end" and not current_doc is None:
current_doc.add_elem(elem)
def import_archive(self):
# Iterate all files in archive
with zipfile.ZipFile(self.archivepath) as zip:
filenames = [info.filename for info in zip.infolist()]
for filename in filenames:
nbprint(filename)
with zip.open(filename) as jsonfile:
self.parse_file(jsonfile)
def run_importer(info=None):
nbprint('Importer').push()
if info is None:
iterate(["data"], [import_data], depth=0)
else:
import_data(info)
nbprint.pop()
def run_tokenizer(info=None):
nbprint('Tokenizer').push()
if info is None:
iterate(['token:BC', 'data'], tokenize)
else:
tokenize(info)
nbprint.pop()
def filter(self):
if self._filter is None:
nbprint('Loading word2vec filter...')
if self.fast_filter:
self._filter = FastWord2VecFilter(self.vocab, self.track_exclusion)
else:
self._filter = Word2VecFilter(self.vocab, self.track_exclusion)
nbprint.clear_last()
return self._filter
def check_requirements(info):
# Check if documents file exists
if not data.documents_exists(info):
# Run importer
nbprint('Documents missing.')
run_importer(info)
# Check if it was successfull
return data.documents_exists(info)
return True
def check_requirements(info):
# Check if tokens file exists
if not data.tokenized_document_exists(info):
# Run Tokenizer
nbprint('Tokens missing.')
run_tokenizer(info)
# Check if it was successfull
return data.tokenized_document_exists(info)
return True
def _run(self, info):
nbprint('Running c-means')
cntr, u, u0, d, jm, p, fpc = fuzz.cluster.cmeans(self.input_mat,
info["num_topics"],
1.1,
error=0.0005,
maxiter=100,
init=None)
self.H = u
def count_mat(info):
# Reset runvars
global runvars
runvars = None
# Check if Vocab and Tokens exist
if not check_requirements(info):
nbprint('Skipping Vectorizer (requirements not satisfied)')
raise BreakIteration()
def filter_max_word_length(info, runvars):
max_word_length = get_option(info, 'max_word_length')
if max_word_length:
old_length = len(runvars['counts'])
runvars['counts'][:] = [
vocab_item for vocab_item in runvars['counts']
if len(vocab_item.token) <= max_word_length
]
nbprint('Removed {} tokens with length greater than {}'.format(
old_length - len(runvars['counts']), max_word_length))
def vocab(self):
if self._vocab is None:
nbprint('Loading embedding vocab...')
if data.embedding_meta_exists('vocab', self.info):
self._vocab = data.load_embedding_meta('vocab', self.info)
else:
self._vocab = self._load_vocab()
data.save_embedding_meta(self._vocab, 'vocab', self.info)
nbprint.clear_last()
return self._vocab
def run_model(info):
info['num_topics'] = convert_num_topics(info, info['num_topics'])
# Check if input mat exists
if config.skip_existing and info['model'].output_exists(info):
nbprint('Skipping Model (file(s) exists)')
return
info['model'].run(info)
info['model'].save(info)
nbprint('Model: success')
def run_vocab(info=None):
nbprint('Vocab').push()
if info is None:
iterate(["data", "token", "vocab"], [check_tokens, build_vocab])
else:
check_tokens(info)
build_vocab(info)
nbprint.pop()
def check_requirements(info):
# Check if documents file exists
if not data.input_mat_exists(info):
# Run Importer
nbprint('Input mat missing.')
run_vectorizer(info)
# Check if it was successfull
if not data.input_mat_exists(info):
return False
return True
def filter_min_count(info, runvars):
min_count = get_option(info, 'min_count')
if min_count:
old_length = len(runvars['counts'])
runvars['counts'][:] = [
vocab_item for vocab_item in runvars['counts']
if vocab_item.total >= min_count
]
nbprint(
'Removed {} tokens occuring less than {} times in total.'.format(
old_length - len(runvars['counts']), min_count))
def filter_max_docs(info, runvars):
max_docs = get_option(info, 'max_docs')
if max_docs:
max_docs = to_abs(max_docs, runvars['num_docs'])
old_length = len(runvars['counts'])
runvars['counts'][:] = [
vocab_item for vocab_item in runvars['counts']
if vocab_item.document <= max_docs
]
nbprint('Removed {} tokens occuring in more than {} documents'.format(
old_length - len(runvars['counts']), max_docs))
def run_distiller():
global rejector
rejector = Rejector(0.99)
nbprint('Distiller').push()
iterate(['distiller', 'distillerinputs'],
add_second_info,
print_iterates=False)
nbprint.pop()
def filter_stopwords(info, runvars):
stopwords_corpus_name = get_option(info, 'stopwords')
if stopwords_corpus_name:
stopword_corpus = set(stopwords.words(stopwords_corpus_name))
old_length = len(runvars['counts'])
runvars['counts'][:] = [
vocab_item for vocab_item in runvars['counts']
if vocab_item.token not in stopword_corpus
]
nbprint('Removed {} tokens in the {} stopword corpus'.format(
old_length - len(runvars['counts']), stopwords_corpus_name))
def _run(self, info):
nbprint('Running LDA')
vocab = data.load_vocab(info)
id2word = {e['id']: e['token'] for e in vocab}
corpus = Sparse2Corpus(self.input_mat)
lda = LdaModel(corpus, id2word=id2word, num_topics=info["num_topics"])
self.W = lda.get_topics().T
self.H = np.zeros((info["num_topics"], self.input_mat.shape[1]))
for idx, doc in enumerate(corpus):
weights = lda[doc]
for topic, value in weights:
self.H[topic, idx] = value
def build_vocab(info):
# Check if vocab exists
if config.skip_existing and data.vocab_exists(info):
nbprint('Skipping Vocab (file exists)')
return
# Build vocab
current_vocab_builder = get_vocab_builder(info)
current_vocab_builder.build_vocab()
vocab = current_vocab_builder.get_vocab()
# Save Vocab
data.save_vocab(vocab, info)
def save_documents(self):
nbprint('Saving documents')
self.classinfo = ClassInfo()
# Open Writer
with data.document_writer(self.info) as document_writer:
self.docinfo = DocumentInfo(document_writer)
for doc in self.documents:
text = doc.content['subject']
class_id = self.classinfo.increase_class_count(
doc.content['maincat'])
self.docinfo.add_document(text, class_id)
def save(self):
if self.topiclist is None:
nbprint('Distiller did not produce topiclist.')
return
if self.topic_token_version is None:
nbprint(
'Distiller did not set "topic_token_version", discarding result.'
)
return
self.runinfo['topic_token_version'] = self.topic_token_version
data.save_topiclist(self.topiclist, self.runinfo)
def phrase(info):
# Check if Documents exist
if not check_phrase_requirements(info):
nbprint('Skipping Vectorizer (requirements not satisfied)')
return
# Check if input mat exists
if config.skip_existing and data.input_mat_exists(info):
nbprint('Skipping Vectorizer (file exists)')
return
make_phrase_mat(info, runvars)
data.save_dense_input_mat(runvars['phrase_mat'], info)
