def train_classifier(papers: list, num_topics: int) -> LdaModel:
"""
Trains the Lda model with selected documents.
Training is done by cleaning the documents, index the words
and train the model with a given number of topics
Args:
papers: list of papers, each item containing the corpus of a document
num_topics: amount of topics that need to be trained
Returns: Trained lda model
"""
papers_clean = [clean(paper) for paper in papers]
dictionary = corpora.Dictionary(papers_clean)
doc_term_matrix = [dictionary.doc2bow(paper) for paper in papers_clean]
models = []
print("Start generating models")
for x in range(13, 14):
ldamodel = LdaMulticore(doc_term_matrix, num_topics=x, id2word=dictionary, passes=50)
topic_words = [w[0] for x in range(ldamodel.num_topics) for w in ldamodel.show_topic(x)]
unique_words = set(topic_words)
models.append(ldamodel)
print(x, len(unique_words), len(unique_words)/float(len(topic_words)))
x = 1
while True:
try:
x = int(input("Enter the model you want to train labels for:\n"))
except ValueError:
print("not an integer")
continue
if x > len(models) or x < 1:
print("Model does not exist")
else:
break
return models[x-1], dictionary
def generate_lda_topics(self):
from gensim.corpora import Dictionary, MmCorpus
from gensim.models.ldamulticore import LdaMulticore
import pyLDAvis
import pyLDAvis.gensim
import warnings
import _pickle as pickle
trigram_sentences = LineSentence(self.trigram_sentences_filepath)
trigram_dictionary = Dictionary(trigram_sentences)
# trigram_dictionary.filter_extremes(no_below=10, no_above=0.4)
trigram_dictionary.compactify()
trigram_dictionary.save(self.trigram_dictionary_filepath)
def trigram_bow_generator(filepath):
for sentence in LineSentence(filepath):
yield trigram_dictionary.doc2bow(sentence)
MmCorpus.serialize(
self.trigram_bow_filepath,
trigram_bow_generator(self.trigram_sentences_filepath))
trigram_bow_corpus = MmCorpus(self.trigram_bow_filepath)
with warnings.catch_warnings():
warnings.simplefilter('ignore')
lda = LdaMulticore(trigram_bow_corpus,
num_topics=3,
id2word=trigram_dictionary,
workers=3)
lda.save(self.lda_model_filepath)
lda = LdaMulticore.load(self.lda_model_filepath)
lda.show_topic(0)
lda.show_topic(1)
lda.show_topic(2)
LDAvis_prepared = pyLDAvis.gensim.prepare(lda, trigram_bow_corpus,
trigram_dictionary)
pyLDAvis.save_html(LDAvis_prepared, self.LDAvis_html_filepath)
def perform(self, option="load"):
"""
Perform LDA analysis to generate topics
and topic distribution for each app
"""
logging.info("Start Lda analysis")
ldamodel = LdaMulticore(self.corpus, num_topics=self.ntopic, id2word=self.dictionary, passes=self.iteration)
logging.info("LDA multicore modeling done")
ldamodel.save(self.lda_out_file_name)
self.topics = {}
for i in range(0, self.ntopic, 1):
self.topics["topic{}".format(i)] = ldamodel.show_topic(i, topn=self.nword)
logging.info("Topic{}".format(i))
words = [w[1] for w in self.topics["topic{}".format(i)]]
logging.info(words)
def LDA_Machine(lst_dict, handle_lst):
assert type(lst_dict) == list, "Please enter a list of dictionary's"
assert type(handle_lst) == list, "Please enter a list of handles"
file_path_corpus = "/home/igabr/new-project-4/mm_corpus/"
cnt_1 = -1
cnt_2 = -1
for handle in handle_lst:
cnt_1 += 1
clean_tweet_list = []
handle_tweets = lst_dict[cnt_1][handle]['content']
if handle_tweets == []:
continue
else:
for raw_tweet in handle_tweets:
clean_tweet = ""
tokenized_tweet = nlp(raw_tweet)
for token in tokenized_tweet:
if token.is_space:
continue
elif token.is_punct:
continue
elif token.is_stop:
continue
elif token.is_digit:
continue
elif len(token) == 1:
continue
elif len(token) == 2:
continue
else:
clean_tweet += str(token.lemma_) + " "
clean_tweet_list.append(clean_tweet)
clean_tweet_list = list(map(str.strip, clean_tweet_list))
clean_tweet_list = [x for x in clean_tweet_list if x != ""]
lst_dict[cnt_1][handle]['tokenized_tweets'] = clean_tweet_list
print("{} tokenized_tweets inserted!".format(handle))
print()
master_df = make_df(lst_dict)
to_remove = list(master_df[master_df['tokenized_tweets'].isnull()].index)
index_to_remove = []
for i in to_remove:
index_to_remove.append(handle_lst.index(i))
new_handle_list = [
v for i, v in enumerate(handle_lst)
if i not in frozenset(index_to_remove)
]
master_df.dropna(subset=['tokenized_tweets'], inplace=True)
master_df = filtration(master_df, "tokenized_tweets")
clean_lst_dict = dataframe_to_dict(master_df)
print()
print("Cleaning of master dataframe complete!")
for handle in new_handle_list:
cnt_2 += 1
try:
list_of_tweets = clean_lst_dict[cnt_2][handle]['tokenized_tweets']
except KeyError:
continue
gensim_format_tweets = []
for tweet in list_of_tweets:
list_form = tweet.split()
gensim_format_tweets.append(list_form)
gensim_dictionary = Dictionary(gensim_format_tweets)
gensim_dictionary.filter_extremes(no_below=10, no_above=0.4)
gensim_dictionary.compactify(
) # remove gaps after words that were removed
MmCorpus.serialize(
file_path_corpus + "{}.mm".format(handle),
bag_of_words_generator(gensim_format_tweets, gensim_dictionary))
corpus = MmCorpus(
file_path_corpus +
"{}.mm".format(handle)) #loading the corpus from disk
if corpus.num_terms == 0:
continue
else:
lda = LdaMulticore(corpus,
num_topics=10,
id2word=gensim_dictionary,
passes=100,
workers=100)
lda.save(file_path_corpus + "lda_model_{}".format(handle))
print("LDA model for {} saved!".format(handle))
word_list = []
for i in range(10):
for term, frequency in lda.show_topic(i, topn=100):
if frequency != 0:
word_list.append(term)
LDA_Counter = Counter(word_list)
clean_lst_dict[cnt_2][handle]['LDA'] = LDA_Counter
print("Inserted LDA Counter into {} dictionary".format(handle))
pickle_object(clean_lst_dict, "2nd_degree_connections_LDA_complete")
print("Script Complete")
class recommendationsys_LDA:
def __init__(self, ngram):
# load the spacy english model
self.nlp = spacy.load('en')
self.extrawords = ["'s", "st", "th", "’s", "-PRON-", "’", "htt", "ht", "km", "pm", "am"]
# parse the latest emoji code
html = str(ur.urlopen('http://www.unicode.org/Public/emoji/5.0/emoji-data.txt').read())
codes=list(map(lambda x: '-'.join(['\\U'+a.zfill(8) for a in x.split('..')]).encode().decode('unicode-escape'),re.findall(r'(?<=\\n)[\w.]+',html)))
self.emojiPattern = re.compile('['+','.join(codes)+']',flags=re.UNICODE)
PROJECT_DIRECTORY = 'output/project/' + project_name
self.f_titles = PROJECT_DIRECTORY + '/titlesLF_target.txt'
self.f_authors = PROJECT_DIRECTORY + '/authors_target.txt'
self.authorcontent_clean = {}
self.ngram_bow_corpus = []
self.ldavec = {}
self.ngram_dictionary = None
self.ngram = ngram
self.num_topics = None
def clean_text(self, text):
# remove the 'RT' and replace '\n' to '.'
text = text.lower()
#text = text.replace('RT',' ')
text = text.replace('\n',' . ')
# this is for USC-2
# remove emojis
myre = re.compile(u'('
'@\S*\s?|#|' # remove @ mention names and hastag sign
'http[s]?[:…]+\S*\s|' # remove url
'[-~\^\$\*\+\{\}\[\]\\\|\(\)/“"]|'
'rt[:]? |'
'…'
')+', re.UNICODE)
text = myre.sub(' ', text)
text = self.emojiPattern.sub(' ', text)
text = text.replace('&','and')
#text = ' '.join(text)
return text
#---------------------------
# make the recommendations
#---------------------------
def recomendation(self, username, topicn=0, list=[]):
similaritis = self.ldacosinesimilarity(username,topicn)
result=[]
# list is empty, run on the whole dataset
if not list:
for key, value in sorted(similaritis.items(), key=lambda x:x[1]):
result.append((key,value))
else:
for i in list:
result.append((i,similaritis[i]))
# sort the result by similarities
result = sorted(result, key=lambda x:x[1])
#---------------------------
# load and clean the data
#---------------------------
def loadandclean(self, n=-1):
#authorcontent = {}
# ------
with codecs.open(self.f_titles, encoding='utf_8') as f_t:
with codecs.open(self.f_authors, encoding='utf_8') as f_a:
for l_a, l_t in zip(f_a, f_t):
# remove the '\n' at the end
key = l_a[:-1].lower()
l_t = self.clean_text(l_t)
if key in self.authorcontent_clean:
self.authorcontent_clean[key].append(l_t)
#self.authorcontent_clean[key] = self.clean_text(value)
else:
self.authorcontent_clean[key] = [l_t]
#self.authorcontent_clean[key] = self.clean_text(value)
if n != -1 and len(self.authorcontent_clean) == n:
break
# ---------------
for key, value in self.authorcontent_clean.items():
self.authorcontent_clean[key] = self.lemmatized_sentence_corpus(self.authorcontent_clean[key])
#------------------------------------------------------
# build the trigram content based on the clean content
#------------------------------------------------------
def punct_space(self, token):
"""
helper function to eliminate tokens
that are pure punctuation or whitespace
"""
#return token.pos_ == 'NOUN' or token.is_punct or token.is_space or token.lemma_ in spacy.lang.en.STOP_WORDS or token.lemma_ in self.extrawords or len(str(token)) < 2
return token.is_punct or token.is_space or token.lemma_ in spacy.lang.en.STOP_WORDS or token.lemma_ in self.extrawords or len(str(token)) < 2
def lemmatized_sentence_corpus(self, contents):
"""
generator function to use spaCy to parse reviews,
lemmatize the text, and yield sentences
"""
sentents = []
for content in self.nlp.pipe(contents,batch_size=500, n_threads=8):
for sent in content.sents:
#sentents.append(u' '.join([token.lemma_ for token in sent
# if not punct_space(token)]))
#sentents.append([token.lemma_ for token in sent
# if not punct_space(token)])
tokens = []
for token in sent:
if self.punct_space(token):
continue
#if token.lemma_ == '-PRON-':
# token.lemma_ = token.lower_
tokens.append(token.lemma_)
sentents.append(tokens)
return sentents
"""
prepare the parameters for lda
"""
def ldainit(self):
# self.num_topics = num_topics
# ngram = self.ngram
# # if ngram_bow_corpus is empty, build it first
# if not self.ngram_bow_corpus:
self.user_sentences = self.authorcontent_clean
self.user_bigramsentences = {}
self.all_sentences = []
self.all_bigram_sentences = []
sentences = list(self.authorcontent_clean.values())
self.all_sentences = [item for sublist in sentences for item in sublist]
# buld bigram model
if self.ngram == 2:
self.bigram_model = Phrases(self.all_sentences)
for user,content in self.user_sentences.items():
bigram_s = []
for s in content:
bigram_s.append(self.bigram_model[s])
self.user_bigramsentences[user] = bigram_s
self.all_bigram_sentences += self.user_bigramsentences[user]
def trainlda(self, topics_n = 10):
self.num_topics = topics_n
alltexts = []
for name,sentences in self.user_sentences.items():
sentences = [item for sublist in sentences for item in sublist]
alltexts.append(sentences)
# if self.ngram_dictionary == None:
# if self.ngram == 1:
# self.ngram_dictionary = Dictionary(self.all_sentences)
# elif self.ngram == 2:
# self.ngram_dictionary = Dictionary(self.all_bigram_sentences)
#
if self.ngram_dictionary == None:
if self.ngram == 1:
self.ngram_dictionary = Dictionary(alltexts)
elif self.ngram == 2:
self.ngram_dictionary = Dictionary(alltexts)
# filter tokens that are very rare or too common from
# the dictionary (filter_extremes) and reassign integer ids (compactify)
self.ngram_dictionary.filter_extremes(no_below=10, no_above=0.8)
self.ngram_dictionary.compactify()
# if self.ngram == 1:
# sentences = self.all_sentences
# elif self.ngram == 2:
# sentences = self.all_bigram_sentences
# ngram_bow_corpus = []
# for sentence in sentences:
# ngram_bow_corpus.append(self.ngram_dictionary.doc2bow(sentence))
#
#
# self.lda = LdaMulticore(ngram_bow_corpus,
# num_topics = topics_n,
# id2word=self.ngram_dictionary,
# workers=3)
ngram_bow_corpus = []
for sentence in alltexts:
ngram_bow_corpus.append(self.ngram_dictionary.doc2bow(sentence))
self.lda = LdaMulticore(ngram_bow_corpus,
num_topics = topics_n,
id2word=self.ngram_dictionary,
workers=3)
# calculate the cohe
topics=[]
for i in range(self.lda.num_topics):
terms = []
for n in self.lda.show_topic(i):
terms.append(n[0])
topics.append(terms)
cm_umass = CoherenceModel(topics=topics, corpus=ngram_bow_corpus, dictionary=self.ngram_dictionary, coherence='u_mass')
cm_cv = CoherenceModel(topics=topics, texts=alltexts, dictionary=self.ngram_dictionary, coherence='c_v')
cm_cuci = CoherenceModel(topics=topics, texts=alltexts, dictionary=self.ngram_dictionary, coherence='c_uci')
cm_cnpmi = CoherenceModel(topics=topics, texts=alltexts, dictionary=self.ngram_dictionary, coherence='c_npmi')
return topics_n, cm_umass.get_coherence(), cm_cv.get_coherence(),cm_cuci.get_coherence(),cm_cnpmi.get_coherence()
def explore_topic(self, topic_number, topn=25):
"""
accept a user-supplied topic number and
print out a formatted list of the top terms
"""
print(u'{:20} {}'.format(u'term', u'frequency') + u'\n')
for term, frequency in self.lda.show_topic(topic_number, topn):
print(u'{:20} {:.3f}'.format(term, round(frequency, 3)))
def runlda(self, username):
if self.ngram == 1:
user_sentences = self.user_sentences[username]
elif self.ngram == 2:
user_sentences = self.user_bigramsentences[username]
# flat the list of list into single list
user_sentences = [item for sublist in user_sentences for item in sublist]
user_bow = self.ngram_dictionary.doc2bow(user_sentences)
user_lda = self.lda[user_bow]
#user_lda = sorted(user_lda, key=lambda x:-x[1])
return user_lda
"""
compute the lda topic vec for every one
"""
def runldavec(self):
if not self.ldavec:
for key, value in self.user_sentences.items():
vec = np.zeros(self.num_topics)
result = self.runlda(key)
for i in result:
vec[i[0]] = i[1]
self.ldavec[key] = vec
"""
"""
def runtopntopic(self, n):
self.topntopics = []
for key, value in self.ldavec.items():
idx = value.argsort()
self.topntopics += list(idx[-n:])
self.topntopics = list(set(self.topntopics))
"""
compute the lda cosine similarity between a given user and the rest users
"""
def ldacosinesimilarity(self, username, topn=0):
if username not in self.authorcontent_clean:
print('The user cannot find')
return
if topn < 0:
print('topn should be >= 0')
return
topn = int(topn)
cosinesimilaritydic = {}
if not self.ldavec:
self.runldavec()
if topn == 0:
usertopicvec = self.ldavec[username]
else:
self.runtopntopic(topn)
usertopicvec = self.ldavec[username][self.topntopics]
for key, value in self.ldavec.items():
if key != username:
if topn == 0:
pairtopicvec = value
else:
pairtopicvec = value[self.topntopics]
cosinesimilarity = pairwise_distances(np.array(usertopicvec).reshape(1,-1),np.array(pairtopicvec).reshape(1,-1), metric='cosine')[0][0]
cosinesimilaritydic[key] = cosinesimilarity
return cosinesimilaritydic
num_topics=6,
id2word=trigram_dictionary,
workers=3)
lda.save(lda_model_filepath)
# load the finished LDA model from disk
lda = LdaMulticore.load(lda_model_filepath)
def explore_topic(topic_number, topn=6):
"""
accept a user-supplied topic number and
print out a formatted list of the top terms
"""
for term, frequency in lda.show_topic(topic_number, topn=25):
print (f"{term:20} : {frequency:.3f}")
explore_topic(topic_number=3)
print("done")
# =========from earlier =========
# dictionary = corpora.Dictionary(text_data)
# corpus = [dictionary.doc2bow(text) for text in text_data]
# import pickle
# pickle.dump(corpus, open('corpus.pkl', 'wb'))
class LdaRecsys:
def __init__(self):
self.user_corp = {}
self.corp_dict = {}
self.corp_bow = []
self.user_profile = UserProfile()
self.user_profile.getUserList()
self.user_list = self.user_profile.user_list
self.cosine_distance_dict = {}
self.lda_vect_dict = {}
def loadCorpDict(self, user_list=[]):
return
def saveCorpDict(self):
return
def buildCorpDict(self, user_list=[], no_blow_doc=10, no_above_doc=0.5):
if not user_list:
if not self.user_list:
print('user list is empty! will run getUserList')
self.user_profile.getUserList()
self.user_list = self.user_profile.user_list
print('get the user list')
user_list = self.user_list
if not user_list:
print('user list is still empty!')
return []
self.user_corp = self.user_profile.getCorpProfile(self.user_list)
self.corp_dict = Dictionary(
[corp for corp in list(self.user_corp.values())])
# Keep tokens which are contained in at least no_below documents
# Keep tokens which are contained in no more than no_above documents
# (fraction of total corpus size, not an absolute number)
self.corp_dict.filter_extremes(no_below=no_blow_doc,
no_above=no_above_doc)
self.corp_dict.compactify()
def buildCorpBow(self):
if not self.user_corp or not self.corp_dict:
self.buildCorpDict()
self.corp_bow = {}
for user, corp in self.user_corp.items():
self.corp_bow[user] = self.corp_dict.doc2bow(corp)
def saveCorpBow(self):
return
def loadCorpBow(self):
return
def trainLDA(self, topics_num, iter_num=50):
# reset the cosine_distance_dict in every training
self.cosine_distance_dict = {}
self.topics_num = topics_num
corp_bow = [bow for bow in list(self.corp_bow.values())]
self.lda = LdaMulticore(corp_bow,
num_topics=topics_num,
id2word=self.corp_dict,
iterations=iter_num,
workers=4)
def runLDA(self, user_name):
if user_name in self.corp_bow:
user_bow = self.corp_bow[user_name]
else:
print('no such user! Please check the screen name')
return
user_lda = self.lda[user_bow]
return user_lda
def buildLdaVect(self):
for user, bow in self.corp_bow.items():
vect = np.zeros(self.topics_num)
user_lda = self.lda[bow]
for i in user_lda:
vect[i[0]] = i[1]
self.lda_vect_dict[user] = vect
def ldaCosineDistance(self, user_name):
if not self.lda_vect_dict:
self.buildLdaVect()
if user_name not in self.lda_vect_dict:
print('no such user')
return
cosine_distance_dict = {}
user_vect = self.lda_vect_dict[user_name]
for user, lda_vect in self.lda_vect_dict.items():
cosine_distance = pairwise_distances(
np.array(user_vect).reshape(1, -1),
np.array(lda_vect).reshape(1, -1),
metric='cosine')[0][0]
cosine_distance_dict[user] = cosine_distance
self.cosine_distance_dict[user_name] = cosine_distance_dict
def makeRecommendation(self, user_name, topn_recommendation=10):
if user_name not in self.cosine_distance_dict:
self.ldaCosineDistance(user_name)
user_recommendations = self.cosine_distance_dict[user_name]
n = 0
for recommendation, cosine_distance in sorted(
user_recommendations.items(), key=lambda x: x[1]):
print((recommendation, cosine_distance))
n += 1
if n == topn_recommendation:
break
return user_recommendations
def showTopic(self, topic_number, topn_word=5):
"""
topic_numer:
which topic to show
topn_word:
show top n words in this topic
"""
print(u'{:20} {}'.format(u'term', u'frequency') + u'\n')
for term, frequency in self.lda.show_topic(topic_number, topn_word):
print(u'{:20} {:.3f}'.format(term, round(frequency, 3)))
def showUserTopic(self, user_name, topn_word=10):
if user_name not in self.corp_bow:
print('no such user! please check the screen name')
return
user_bow = self.corp_bow[user_name]
user_lda = self.lda[user_bow]
user_lda = sorted(user_lda, key=lambda x: -x[1])
for topic_number, freq in user_lda:
print('topic number {} {}'.format(topic_number, freq))
print('|____')
self.showTopic(topic_number, topn_word)
print('\n')
# generate LDA model
my_num_topics = 30
# ldamodel = gensim.models.ldamodel.LdaModel(corpus, num_topics=my_num_topics, id2word = dictionary, passes=20)
ldamodel = LdaMulticore(corpus, num_topics=my_num_topics, id2word=dictionary, workers=3, alpha=1e-5, eta=5e-1)
print(ldamodel.print_topics(num_topics=my_num_topics, num_words=5))
print(corpus[0])
print(corpus[1])
print(corpus[2])
print(ldamodel[corpus[0]])
print(ldamodel[corpus[1]])
print(ldamodel[corpus[2]])
# print(ldamodel.print_topics(20))
model_basename = '/home/osboxes/w/wlda/trymodel'
ldamodel.save(model_basename)
for t in range(ldamodel.num_topics):
plt.figure()
plt.imshow(WordCloud().fit_words(dict(ldamodel.show_topic(t, 200))))
plt.axis("off")
plt.title("Topic #" + str(t))
plt.show()
# plt.pause(0.0001)
# create a stram of sentances for corpus dict
input_data = [sent.split(' ') for sent in data['text_clean_bigram'].tolist()]
# topic model with LDA
id2word = Dictionary(input_data)
# Term Document Frequency
corpus = [id2word.doc2bow(text) for text in input_data]
# number of topics
num_topics = 10
# Build LDA model
lda_model = LdaMulticore(corpus=corpus,
id2word=id2word,
num_topics=num_topics,
workers=2)
# topics don't work well as tweets all relate to disasters
lda_model.show_topic(topicid=0, topn=25)
lda_model.show_topic(topicid=1, topn=25)
lda_model.show_topic(topicid=2, topn=25)
lda_model.show_topic(topicid=3, topn=25)
# predict of single string
string_input = data['text_clean_bigram'][1]
lda_topic_prob(string_input, input_data, lda_model)
# predict for all strings
# takes ~20 minutes to run
data['lda_topic_prob'] = data['text_clean_bigram'].apply(
lambda x: lda_topic_prob(x, input_data, lda_model))
# transform the lda topic probabilities into a dataframe representation
# takes a while to run
lda_topic_df = topic_df(data=data,