How to use TaggedDocument in gensim?

user_4660314 0
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I have two directories from which I want to read their text files and label them, but I don't know how to do this via TaggedDocument. I thought it would work as TaggedDocument([Strings],[Labels]) but this doesn't work apparently.

This is my code: 

from gensim import models
from gensim.models.doc2vec import TaggedDocument
import utilities as util
import os
from sklearn import svm
from nltk.tokenize import sent_tokenize
CogPath = "./FixedCog/"
NotCogPath = "./FixedNotCog/"
SamplePath ="./Sample/"
docs = []
tags = []
CogList = [p for p in os.listdir(CogPath) if p.endswith('.txt')]
NotCogList = [p for p in os.listdir(NotCogPath) if p.endswith('.txt')]
SampleList = [p for p in os.listdir(SamplePath) if p.endswith('.txt')]
for doc in CogList:
     str = open(CogPath+doc,'r').read().decode("utf-8")
     docs.append(str)
     print docs
     tags.append(doc)
     print "###########"
     print tags
     print "!!!!!!!!!!!"
for doc in NotCogList:
     str = open(NotCogPath+doc,'r').read().decode("utf-8")
     docs.append(str)
     tags.append(doc)
for doc in SampleList:
     str = open(SamplePath + doc, 'r').read().decode("utf-8")
     docs.append(str)
     tags.append(doc)

T = TaggedDocument(docs,tags)

model = models.Doc2Vec(T,alpha=.025, min_alpha=.025, min_count=1,size=50)

and this is the error I get: 

Traceback (most recent call last):
  File "/home/farhood/PycharmProjects/word2vec_prj/doc2vec.py", line 34, in <module>
    model = models.Doc2Vec(T,alpha=.025, min_alpha=.025, min_count=1,size=50)
  File "/home/farhood/anaconda2/lib/python2.7/site-packages/gensim/models/doc2vec.py", line 635, in __init__
    self.build_vocab(documents, trim_rule=trim_rule)
  File "/home/farhood/anaconda2/lib/python2.7/site-packages/gensim/models/word2vec.py", line 544, in build_vocab
    self.scan_vocab(sentences, progress_per=progress_per, trim_rule=trim_rule)  # initial survey
  File "/home/farhood/anaconda2/lib/python2.7/site-packages/gensim/models/doc2vec.py", line 674, in scan_vocab
    if isinstance(document.words, string_types):
AttributeError: 'list' object has no attribute 'words'
word2vec doc2vec gensim nltk python
3 Answers

The input for a Doc2Vec model should be a list of TaggedDocument(['list','of','word'], [TAG_001]). A good practice is using the indexes of sentences as the tags. For example, to train a Doc2Vec model with two sentences (i.e. documents, paragraphs):

s1 = 'the quick fox brown fox jumps over the lazy dog'
s1_tag = '001'
s2 = 'i want to burn a zero-day'
s2_tag = '002'

docs = []
docs.append(TaggedDocument(words=s1.split(), tags=[s1_tag])
docs.append(TaggedDocument(words=s2.split(), tags=[s2_tag])

model = gensim.models.Doc2Vec(vector_size=300, window=5, min_count=5, workers=4, epochs=20)
model.build_vocab(docs)

print 'Start training process...'
model.train(docs, total_examples=model.corpus_count, epochs=model.iter)

#save model
model.save(model_path)
user_60883420

You can use gensim's common_texts as an example: 

from gensim.test.utils import common_texts
from gensim.models.doc2vec import Doc2Vec, TaggedDocument

documents = [TaggedDocument(doc, [i]) for i, doc in enumerate(common_texts)]
model = Doc2Vec(documents, vector_size=5, window=2, min_count=1, workers=4)

This will use common_texts and TaggedDocument to create the document representation expected by the Doc2Vec algorithm.

user_16395940
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