def run_topic_model(field, subfield, output_dir, n_topics, seed=42):
np.random.seed(seed)
documents = iter_elastic_query(ES_INSTANCE, ES_INDEX, field, subfield)
corpus = EntitiesTokenizer(documents)
if os.path.isdir(output_dir):
shutil.rmtree(output_dir)
os.makedirs(output_dir)
# Create dictionary
corpus_bow = CorpusBOW(corpus)
corpus_dict = corpus_bow.save_dict(os.path.join(output_dir, 'corpus.dict'))
# Serialize and store the corpus
corpus_file = corpus_bow.serialize(os.path.join(output_dir, 'corpus.mm'))
# Create LDA model from corpus and dictionary
lda = LDA(os.path.join(output_dir, 'corpus.mm'),
os.path.join(output_dir, 'corpus.dict'),
n_topics,
update_every=1,
chuncksize=10000,
passes=1)
# Generate the input for the termite plot
lda.termite_data(os.path.join(output_dir, 'termite.csv'))
# Get termite plot for this model
termite = Termite(os.path.join(output_dir, 'termite.csv'), "Termite Plot")
termite.plot(os.path.join(output_dir, 'termite.html'))
df_results = generate_csv_output_file(documents, corpus, corpus_bow,
lda.model)
to_r_ldavis(corpus_bow,
dir_name=os.path.join(output_dir, 'ldavis'),
lda=lda)
os.environ["LDAVIS_DIR"] = os.path.join(output_dir, 'ldavis')
try:
subprocess.call(['Rscript', os.path.join(BASEDIR, 'R/runLDAvis.R')])
except ValueError:
logging.warning("Unable to run runLDAvis.R")
def run_model(data,
format='json_stream',
tokenizer='simple',
n_topics=10,
dir_path='./topic_model',
model='lda_batch',
termite_plot=True,
output_file=False,
r_ldavis=False,
prefix_value=None,
event_value=None,
field=None,
query='*:*',
index=None,
subfield=None,
seed=42):
"""Run your data through all topik functionality and save all results to a specified directory.
Parameters
----------
data: string
Input data (e.g. file or folder or solr/elasticsearch instance).
format: {'json_stream', 'folder_files', 'json_large', 'solr', 'elastic'}.
The format of your data input. Currently available a json stream or a folder containing text files.
Default is 'json_stream'
tokenizer: {'simple', 'collocations', 'entities', 'mixed'}
The type of tokenizer to use. Default is 'simple'.
n_topics: int
Number of topics to find in your data
dir_path: string
Directory path to store all topic modeling results files. Default is `./topic_model`.
model: {'lda_batch', 'lda_online'}.
Statistical modeling algorithm to use. Default 'lda_batch'.
termite_plot: bool
Generate termite plot of your model if True. Default is True.
output_file: bool
Generate a final summary csv file of your results. For each document: text, tokens, lda_probabilities and topic.
r_ldavis: bool
Generate an interactive data visualization of your topics. Default is False.
prefix_value: string
For 'large json' format reader, the prefix value to parse.
event_value: string
For 'large json' format reader, the event value to parse.
field: string
For 'json_stream', 'solr' or 'elastic' format readers, the field to parse.
solr_instance: string
For 'solr' format reader, the url to the solr instance.
query: string
For 'solr' format reader, an optional query. Default is '*:*' to retrieve all documents.
seed: int
Set random number generator to seed, to be able to reproduce results. Default 42.
"""
np.random.seed(seed)
if format == 'folder_files':
id_documents = iter_documents_folder(data)
elif format == 'large_json' and prefix_value is not None and event_value is not None:
id_documents = iter_large_json(data, prefix_value, event_value)
elif format == 'json_stream' and field is not None:
id_documents = iter_document_json_stream(data, field)
elif format == 'solr' and field is not None:
id_documents = iter_solr_query(data, field, query=query)
elif format == 'elastic' and field is not None:
id_documents = iter_elastic_query(data, index, field, subfield)
else:
raise Exception(
"Invalid input, make sure your passing the appropriate arguments for the different formats"
)
ids, documents = unzip(id_documents)
if tokenizer == 'simple':
corpus = SimpleTokenizer(documents)
elif tokenizer == 'collocations':
corpus = CollocationsTokenizer(documents)
elif tokenizer == 'entities':
corpus = EntitiesTokenizer(documents)
elif tokenizer == 'mixed':
corpus = MixedTokenizer(documents)
else:
print("Processing value invalid, using simple")
corpus = SimpleTokenizer(documents)
if os.path.isdir(dir_path):
shutil.rmtree(dir_path)
os.makedirs(dir_path)
# Create dictionary
corpus_bow = CorpusBOW(corpus)
corpus_dict = corpus_bow.save_dict(os.path.join(dir_path, 'corpus.dict'))
# Serialize and store the corpus
corpus_file = corpus_bow.serialize(os.path.join(dir_path, 'corpus.mm'))
# Create LDA model from corpus and dictionary
if model == 'lda_batch':
# To perform lda in batch mode set update_every=0 and passes=20)
# https://radimrehurek.com/gensim/wiki.html#latent-dirichlet-allocation
lda = LDA(os.path.join(dir_path, 'corpus.mm'),
os.path.join(dir_path, 'corpus.dict'),
n_topics,
update_every=0,
passes=20)
elif model == 'lda_online':
# To perform lda in online mode set variables update_every, chuncksize and passes.
lda = LDA(os.path.join(dir_path, 'corpus.mm'),
os.path.join(dir_path, 'corpus.dict'),
n_topics,
update_every=1,
chunksize=10000,
passes=1)
else:
logging.warning('model provided not valid. Using lda_batch.')
lda = LDA(os.path.join(dir_path, 'corpus.mm'),
os.path.join(dir_path, 'corpus.dict'),
n_topics,
update_every=0,
passes=20)
# Generate the input for the termite plot
lda.termite_data(os.path.join(dir_path, 'termite.csv'))
# Get termite plot for this model
if termite_plot:
termite = Termite(os.path.join(dir_path, 'termite.csv'),
"Termite Plot")
termite.plot(os.path.join(dir_path, 'termite.html'))
if output_file:
if format == 'folder_files':
id_documents = iter_documents_folder(data)
elif format == 'large_json':
id_documents = iter_large_json(data, prefix_value, event_value)
else:
id_documents = iter_document_json_stream(data, field)
ids, documents = unzip(id_documents)
df_results = generate_csv_output_file(documents, corpus, corpus_bow,
lda.model)
if r_ldavis:
to_r_ldavis(corpus_bow,
dir_name=os.path.join(dir_path, 'ldavis'),
lda=lda)
os.environ["LDAVIS_DIR"] = os.path.join(dir_path, 'ldavis')
try:
subprocess.call(
['Rscript', os.path.join(BASEDIR, 'R/runLDAvis.R')])
except ValueError:
logging.warning("Unable to run runLDAvis.R")
os.chdir(os.path.join(dir_path, 'ldavis', 'output'))
sp = subprocess.Popen(['python', '-m', 'SimpleHTTPServer', '8000'])
webbrowser.open_new_tab('127.0.0.1:8000')
time.sleep(30)
sp.kill()
