import requests
import random
import nltk
from nltk.corpus import stopwords,wordnet
import re
english_stops = set(stopwords.words('english'))
# below words were intentionally removed , based on few analytical stuff
english_stops.add('.')
english_stops.add('also')
english_stops.add('get')
def feature_extractor(document):
features = {}
ls =[]
for document_words in document:
for i,word in enumerate(document_words):
if ((word.lower() not in english_stops
and word.isalpha())
or word.lower() =='not'):
syn= wordnet.synsets(word.lower())
v='no'
n='no'
r='no'
a='no'
identity='unknown'
if len(syn) is 0:
identity='unknown'
continue
else:
identity='known'
word = word.lower()
features['contains(%s) with identity %s'% (word.lower(),identity)] = True
return features
def pre_train_processor(sent):
rd=re.sub(r'(^@| @)[^ ]+',r"",sent)
rd=re.sub(r'(^http| http)[^ ]+',r"",rd)
rd=re.sub(r'(\.)*\1',r".",rd)
rep=re.findall(r'(\w).*\1.*\1', rd)
for ch in rep:
rd=re.sub(r''+ch+ch+ch+r'+',r''+ch+ch,rd)
sentences = nltk.sent_tokenize(rd)
sentences = [nltk.word_tokenize(sent) for sent in sentences]
return sentences
def train_classifier():
l = ['1006589563512903396', '1008324413029484000', '1040575996755346578', '1045137713186360887', '7022552177697192106','674420826054740334', '698451933787252187','414302334487557591','8944057146243258823','6946341970593481260','1431312376514000040','7864797704321962005','7070434591968454556']
app_id = ''
app_key = ''
final_resp = []
featuresets = []
url ="http://developer.goibibo.com/api/voyager/get_hotels_by_cityid/?app_id=<enter your app id without <> >&app_key=<enter your app key with <> >&city_id=6771549831164675055"
res = requests.get(url)
result = res.json()
print len(result['data'].keys())
count = 0
for key in result['data'].keys():
count +=1
print count
vid = result['data'][key]['hotel_geo_node']['_id']
#vid = data.get('vid','7022552177697192106')
limit = "50"
url = "http://ugc.goibibo.com/api/HotelReviews/forWeb?app_id=" + app_id + "&app_key=" + app_key + "&vid=" + vid+"&limit=" + limit + "&offset=0"
res = requests.get(url)
reslt = res.json()
try:
for review in reslt:
if review.get('reviewContent') and len(review['reviewContent'].strip()) > 10:
final_resp.append({'rating': review['totalRating'], 'text': review['reviewContent']})
except Exception,e:
print str(e)
for x in final_resp:
data = feature_extractor(pre_train_processor(x['text']))
if x['rating'] > 3:
tag = 'good'
elif x['rating'] == 3:
tag = 'moderate'
else:
tag = 'bad'
featuresets.append((data, tag))
print "lenght of data set: " + str(len(featuresets))
feat_len = int(0.8*len(featuresets))
train_set, test_set = featuresets[:feat_len], featuresets[feat_len:]
classifier = nltk.NaiveBayesClassifier.train(train_set)
print nltk.classify.accuracy(classifier, test_set)
return classifier
def check_pos_hotels(classifier, data):
sentences = pre_train_processor(data)
feat = feature_extractor(sentences)
res={}
res['features']=feat
res['tag']=classifier.classify(feat)
return res
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