lda主题词评论python_如何将主题转换为python LDA中每个主题的前20个单词的列表

fromgensimimportcorporaimportgensimfromgensim.models.ldamodelimportLdaModelfromgensim.parsing.preprocessingimportSTOPWORDS# example docsdoc1="""

Java (Indonesian: Jawa; Javanese: ꦗꦮ; Sundanese: ᮏᮝ) is an island of Indonesia.

With a population of over 141 million (the island itself) or 145 million (the

administrative region), Java is home to 56.7 percent of the Indonesian population

and is the most populous island on Earth.[1] The Indonesian capital city, Jakarta,

is located on western Java. Much of Indonesian history took place on Java. It was

the center of powerful Hindu-Buddhist empires, the Islamic sultanates, and the core

of the colonial Dutch East Indies. Java was also the center of the Indonesian struggle

for independence during the 1930s and 1940s. Java dominates Indonesia politically,

economically and culturally.

"""doc2="""

Hydrogen fuel is a zero-emission fuel when burned with oxygen, if one considers water

not to be an emission. It often uses electrochemical cells, or combustion in internal

engines, to power vehicles and electric devices. It is also used in the propulsion of

spacecraft and might potentially be mass-produced and commercialized for passenger vehicles

and aircraft.Hydrogen lies in the first group and first period in the periodic table, i.e.

it is the first element on the periodic table, making it the lightest element. Since

hydrogen gas is so light, it rises in the atmosphere and is therefore rarely found in

its pure form, H2."""doc3="""

The giraffe (Giraffa) is a genus of African even-toed ungulate mammals, the tallest living

terrestrial animals and the largest ruminants. The genus currently consists of one species,

Giraffa camelopardalis, the type species. Seven other species are extinct, prehistoric

species known from fossils. Taxonomic classifications of one to eight extant giraffe species

have been described, based upon research into the mitochondrial and nuclear DNA, as well

as morphological measurements of Giraffa, but the IUCN currently recognizes only one

species with nine subspecies.

"""documents=[doc1,doc2,doc3]document_wrd_splt=[[wordforwordindocument.lower().split()ifwordnotinSTOPWORDS]fordocumentindocuments]dictionary=corpora.Dictionary(document_wrd_splt)print(dictionary.token2id)corpus=[dictionary.doc2bow(text)fortextintexts]lda=LdaModel(corpus,num_topics=3,id2word=dictionary,passes=50)num_topics=3topic_words=[]foriinrange(num_topics):tt=lda.get_topic_terms(i,20)topic_words.append([dictionary[pair[0]]forpairintt])# output>>>topic_words[0]['indonesian','java','species','island','population','million','(the','java.','center','giraffe','currently','genus','city,','economically','administrative','east','sundanese:','itself)','took','1940s.']>>>topic_words[1]['vehicles','fuel','hydrogen','periodic','table,','i.e.','uses','form,','considers','zero-emission','internal','period','burned','cells,','rises','pure','atmosphere','aircraft.hydrogen','water','engines,']>>>topic_words[2]['giraffa,','even-toed','living','described,','camelopardalis,','consists','extinct,','seven','fossils.','morphological','terrestrial','(giraffa)','dna,','mitochondrial','nuclear','ruminants.','classifications','species,','prehistoric','known']