def process_records(records, fields, target, textmodel=None):
tokenize = CountVectorizer().build_analyzer()
input = None
X = None
y_labels = []
for i, record in enumerate(records):
nums = []
strs = []
y_labels.append(record.get(target))
for field in fields:
if is_number(record.get(field)):
nums.append(record[field])
else:
strs.append(str(record.get(field) or "").lower())
if strs:
if input is None:
input = StringIO.StringIO()
print >> input, " ".join(tokenize(" ".join(strs)))
if nums:
if X is None:
X = sp.lil_matrix((len(records),len(nums)))
X[i] = np.array(nums, dtype=np.float64)
if input is not None:
if X is not None:
X_2 = X.tocsr()
else:
X_2 = None
if isinstance(textmodel,basestring):
if textmodel == 'lsi':
corpus = TextCorpus(input)
textmodel = LsiModel(corpus, chunksize=1000)
elif textmodel == 'tfidf':
corpus = TextCorpus(input)
textmodel = TfidfModel(corpus)
elif textmodel == 'hashing':
textmodel = None
hasher = FeatureHasher(n_features=2 ** 18, input_type="string")
input.seek(0)
X = hasher.transform(tokenize(line.strip()) for line in input)
if textmodel:
num_terms = len(textmodel.id2word or getattr(textmodel, 'dfs',[]))
X = corpus2csc(textmodel[corpus], num_terms).transpose()
if X_2 is not None:
# print >> sys.stderr, "X SHAPE:", X.shape
# print >> sys.stderr, "X_2 SHAPE:", X_2.shape
X = sp.hstack([X, X_2], format='csr')
elif X is not None:
textmodel = None
X = X.tocsr()
print >> sys.stderr, "X SHAPE:", X.shape
return X, y_labels, textmodel
def __init__(self, lex_prob_file, corpus_file):
self.lex_prob = defaultdict(list)
for line in open(lex_prob_file):
chunks = line[:-1].split()
self.lex_prob[chunks[1]].append(float(chunks[2]))
corpus = TextCorpus(input=corpus_file)
self.corpus_freq = FreqDist([word for line in corpus.get_texts() for word in line])
self.thresholds = [0.01, 0.05, 0.1, 0.2, 0.5]
def __init__(self, lex_prob_file, corpus_file):
self.lex_prob = defaultdict(list)
for line in open(lex_prob_file):
chunks = line[:-1].split()
self.lex_prob[chunks[1]].append(float(chunks[2]))
corpus = TextCorpus(input=corpus_file)
self.corpus_freq = FreqDist([word for line in corpus.get_texts() for word in line])
self.thresholds = [0.01, 0.05, 0.1, 0.2, 0.5]
def pretrain():
"""pre train the text corpus and build the dictionary"""
gutenberg_corpus = TextCorpus(text_corpus_file)
gutenberg_corpus.dictionary.save(dict_file)
gutenberg_corpus.dictionary.save_as_text(dic_txt_file)
mm = MmCorpus.serialize(mm_corpus_file, gutenberg_corpus)
print mm
def train(text_corpus_file, dict_file):
"""train lsi model from text corpus"""
gutenberg_corpus = TextCorpus(text_corpus_file)
dict = Dictionary.load(dict_file)
lsi = LsiModel(corpus=gutenberg_corpus, id2word=dict, num_topics=400)
lsi.save(model_file)
print lsi.projection.u
print lsi.projection.u.size
print lsi.projection.u[0].size
def train_gensim():
from gensim.corpora import TextCorpus
from gensim.corpora.textcorpus import lower_to_unicode
from gensim.models import Word2Vec as GensimWord2Vec
start = time()
stopwords = []
if args.stop_word_lang:
# starting spark only for this...
spark = SparkSession.builder.appName("load stop words").getOrCreate()
stopwords += StopWordsRemover.loadDefaultStopWords(args.stop_word_lang)
spark.sparkContext.stop()
if args.stop_word_file:
with open(args.stop_word_file) as stop_word_file:
stopwords += [word.strip("\n") for word in stop_word_file.readlines()]
def remove_stopwords(tokens):
return [token for token in tokens if token not in stopwords]
corpus = TextCorpus(
args.txtPath,
dictionary={None: None},
character_filters=[lower_to_unicode],
token_filters=[remove_stopwords]
)
model = GensimWord2Vec(
seed=1,
alpha=args.step_size,
size=args.vector_size,
window=args.window_size,
sample=1e-6,
sg=1
)
model.build_vocab(corpus.get_texts())
model.train(corpus.get_texts(), total_examples=model.corpus_count, epochs=model.epochs)
model.save(args.modelPath)
end = time()
print("Gensim training took {} seconds".format(end - start))
sys.exit(1)
inp, model_name = sys.argv[1:3]
if len(sys.argv) > 3:
ntopics = int(sys.argv[3])
if len(sys.argv) > 4:
keep_words = int(sys.argv[4])
else:
keep_words = DEFAULT_DICT_SIZE
if os.path.exists(outp +
'_wordids.txt.bz2') and os.path.exists(outp +
'_corpus.pkl.bz2'):
dictionary = Dictionary.load_from_text(outp + '_wordids.txt.bz2')
wiki = TextCorpus.load(outp + '_corpus.pkl.bz2')
else:
wiki = TextCorpus(inp)
# only keep the most frequent words
wiki.dictionary.filter_extremes(no_below=20,
no_above=0.1,
keep_n=keep_words)
wiki.dictionary.save_as_text(outp + '_wordids.txt.bz2')
wiki.save(outp + '_corpus.pkl.bz2')
# load back the id->word mapping directly from file
# this seems to save more memory, compared to keeping the wiki.dictionary object from above
dictionary = Dictionary.load_from_text(outp + '_wordids.txt.bz2')
# build tfidf
if os.path.exists(outp + '_tfidf.mm'):
mm = gensim.corpora.MmCorpus(outp + '_tfidf.mm')
__author__ = 'Marci'
import logging, sys, pprint
from gensim.corpora import TextCorpus, MmCorpus, Dictionary
# Set logging for gensim
logging.basicConfig(stream=sys.stdout, level=logging.INFO)
# gensim docs: "Provide a filename or a file-like object as input and TextCorpus will be initialized with a
# dictionary in `self.dictionary`and will support the `iter` corpus method. For other kinds of corpora, you only
# need to override `get_texts` and provide your own implementation."
background_corpus = TextCorpus(input=YOUR_CORPUS)
# Important -- save the dictionary generated by the corpus, or future operations will not be able to map results
# back to original words.
background_corpus.dictionary.save("my_dict.dict")
MmCorpus.serialize(
"background_corpus.mm", background_corpus
) # Uses numpy to persist wiki corpus in Matrix Market format. File will be several GBs.
### Generating a large training/background corpus using Wikipedia
from gensim.corpora import WikiCorpus, wikicorpus
articles = "enwiki-latest-pages-articles.xml.bz2" # available from http://en.wikipedia.org/wiki/Wikipedia:Database_download
# This will take many hours! Output is Wikipedia in bucket-of-words (BOW) sparse matrix.
wiki_corpus = WikiCorpus(articles)
wiki_corpus.dictionary.save("wiki_dict.dict")
MmCorpus.serialize("wiki_corpus.mm", wiki_corpus) # File will be several GBs.
def __init__(self, corpus_file):
corpus = TextCorpus(input=corpus_file)
self.words = corpus.dictionary.values()
from gensim.corpora import TextCorpus, MmCorpus, Dictionary
from gensim.models import TfidfModel
from gensim.models.ldamodel import LdaModel
from gensim.models.hdpmodel import HdpModel
import bz2
out = '/home/mjg/data/descriptions'
# Form corpus
corpus = TextCorpus(bz2.BZ2File(out + '.bz2'))
# remove common words
stoplist = set(
'a,able,about,across,after,all,almost,also,am,among,an,and,any,are,as,at,be,because,been,but,by,can,cannot,could,dear,did,do,does,either,else,ever,every,for,from,get,got,had,has,have,he,her,hers,him,his,how,however,i,if,in,into,is,it,its,just,least,let,like,likely,may,me,might,most,must,my,neither,no,nor,not,of,off,often,on,only,or,other,our,own,rather,said,say,says,she,should,since,so,some,than,that,the,their,them,then,there,these,they,this,tis,to,too,twas,us,wants,was,we,were,what,when,where,which,while,who,whom,why,will,with,would,yet,you,your'
.split(','))
stop_ids = [
corpus.dictionary.token2id[stopword] for stopword in stoplist
if stopword in corpus.dictionary.token2id
]
corpus.dictionary.filter_tokens(stop_ids)
# only keep the most frequent words
corpus.dictionary.filter_extremes(no_below=20, no_above=0.1, keep_n=100000)
# save stuff
MmCorpus.serialize(out + '_bow.mm', corpus, progress_cnt=10000)
corpus.dictionary.save_as_text(out + '_wordids.txt.bz2')
# save memory
dictionary = Dictionary.load_from_text(out + '_wordids.txt.bz2')
del corpus
# initialize corpus reader and word->id mapping
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright (C) 2017 Serge Sharoff
# This program is free software under GPL 3, see http://www.gnu.org/licenses/
'''
A script for inferring topics for documents with an existing model
'''
import sys
from gensim.models.ldamulticore import LdaMulticore
from gensim.corpora import Dictionary, TextCorpus
mname = sys.argv[1]
cname = sys.argv[2]
lda = LdaMulticore.load(mname)
dictionary = Dictionary.load_from_text(cname + '_wordids.txt.bz2')
wiki = TextCorpus.load(cname + '_corpus.pkl.bz2')
for d in wiki.get_texts():
#bow = dictionary.doc2bow(d.split())
t = lda.get_document_topics(dictionary.doc2bow(d))
besttopval = 0
for i in range(len(t)):
topic = t[i]
if topic[1] > besttopval:
besttopval = topic[1]
besttop = topic[0]
print('%d %.3f' % (besttop, besttopval))
if wiki: # models will be trained on the Dutch Wikipedia corpus
if os.path.exists(f_bow):
corpus = WikiCorpus.load(f_bow)
else:
# download wikipedia training corpus (2015/10/14 18:45, 132MB)
if not os.path.exists(f_corpus):
wiki_lang, wiki_size, wiki_url = wikis[lang]
if raw_input("About to download {0} Wikipedia corpus ({1}). Do you want to proceed? (y/n) ".format(wiki_lang, wiki_size)).startswith("y"):
util.download_file(wiki_url, f_corpus, progress=True)
else:
sys.exit()
corpus = WikiCorpus(f_corpus)
# corpus.save(f_bow)
else: # models will be trained on your own corpus
if os.path.exists(f_bow):
corpus = TextCorpus.load(f_bow)
else:
corpus = TextCorpus(f_corpus)
# corpus.save(f_bow)
# filter dictionary
corpus.dictionary.filter_extremes(no_below=0, no_above=1, keep_n=voc_size)
corpus.dictionary.save(f_dict)
corpus.save(f_bow)
# tf-idf model
if os.path.exists(f_tfidf):
tfidf = TfidfModel.load(f_tfidf)
else:
tfidf = TfidfModel(corpus, id2word=corpus.dictionary)
tfidf.save(f_tfidf)
def __init__(self, input=None): TextCorpus.__init__(self, input)
load_dotenv('./.env')
# logging
import logging
logger = logging.getLogger()
ch = logging.StreamHandler()
ch.setLevel(logging.INFO)
logger.addHandler(ch)
logger.info("Setting up app!")
app = Flask(__name__)
CORS(app)
# setup model stuff
corpus = TextCorpus('jobspicker/jobspicker-descriptions.csv')
corpus.dictionary.filter_extremes(no_below=4, no_above=.9, keep_n=100000)
sentences = [list(g) for g in list(corpus.get_texts())]
tfidf = TfidfModel(corpus)
model = Word2Vec.load("profiles.model")
corp_vecs = corpus_vec(sentences, model, corpus)
# create simple helper functions
get_vec = lambda t: sentence_to_vec(t, model, corpus, tfidf)
get_job = lambda v: get_closest_doc(v, corp_vecs, sentences)
# our database of bayesopt models
user_models = {}
@app.route('/init/<i>')
def init(i):