def get_review_tfidf_dict(self, a_document_name):
# return a dictionary with each key,value pair as review_id and review_content
hw1 = Hw1()
review_id_content_dict = {}
words_lists = []
review_id_mapper = {}
# create a map from Review-ID to words_lists in a review
# store all the stemmed words_lists
for line in open(a_document_name, 'r'):
line = hw1.read_line(line)
review_id_mapper[line['review_id']] = line
review_id_content_dict[line['review_id']] = dict(
hw1.unigram_count(line['text']))
words_lists.append(Hw1.get_stemmed_words(line['text']))
# get all the unique words in a list
words = []
i = 0
while i < len(words_lists):
for word in words_lists[i]:
words.append(word)
i = i + 1
#get the unique words only, using set for that
words = list(set(words))
# calculate number of reviews in which each term occur
term_review_freq_dict = {}
for word in words:
i = i + 1
term_review_freq_dict[word] = 0
for review_id in review_id_content_dict:
if word in review_id_content_dict[review_id].keys():
term_review_freq_dict[word] += 1
# calculate the TFIDF scores of each term in each review
tfidf_dict = {}
total_reviews = len(review_id_content_dict.keys())
print 'Total' + str(total_reviews)
for review_id in review_id_content_dict:
tfidf_dict[review_id] = {}
for word in review_id_content_dict[review_id]:
tfidf_dict[review_id][word] = (1 + math.log10(
review_id_content_dict[review_id][word])) * (
math.log(total_reviews) -
math.log(term_review_freq_dict[word]))
i = 0
for key in tfidf_dict.keys():
i = i + 1
print str(key) + ':' + str(tfidf_dict[key])
if i > 10:
break
return tfidf_dict, review_id_mapper
def get_review_tfidf_dict(self, a_document_name):
# return a dictionary with each key,value pair as review_id and review_content
hw1 = Hw1()
review_id_content_dict = {}
words_lists = []
review_id_mapper = {}
# create a map from Review-ID to words_lists in a review
# store all the stemmed words_lists
for line in open(a_document_name, 'r'):
line = hw1.read_line(line)
review_id_mapper[line['review_id']] = line
review_id_content_dict[line['review_id']] = dict(hw1.unigram_count(line['text']))
words_lists.append(Hw1.get_stemmed_words(line['text']))
# get all the unique words in a list
words = []
i = 0
while i < len(words_lists) :
for word in words_lists[i] :
words.append(word)
i = i + 1
#get the unique words only, using set for that
words = list(set(words))
# calculate number of reviews in which each term occur
term_review_freq_dict = {}
for word in words:
i = i + 1
term_review_freq_dict[word] = 0
for review_id in review_id_content_dict:
if word in review_id_content_dict[review_id].keys():
term_review_freq_dict[word] += 1
# calculate the TFIDF scores of each term in each review
tfidf_dict = {}
total_reviews = len(review_id_content_dict.keys())
print 'Total' + str(total_reviews)
for review_id in review_id_content_dict:
tfidf_dict[review_id] = {}
for word in review_id_content_dict[review_id]:
tfidf_dict[review_id][word] = (1 + math.log10(review_id_content_dict[review_id][word])) * (math.log(total_reviews) - math.log(term_review_freq_dict[word]))
i = 0
for key in tfidf_dict.keys() :
i = i + 1
print str(key) + ':' + str(tfidf_dict[key])
if i > 10:
break
return tfidf_dict, review_id_mapper
from hw1 import Hw1 infilename='review_KcSJUq1kwO8awZRMS6Q49g' f=open(infilename,'r') tokens = Hw1.tokenize(Hw1.read_line(f.readline())['text']) stop_removed = Hw1.stopword(tokens) stemmed = Hw1.stemming(stop_removed) print 'task-4.py // print out the "text" part of the first review after stemming' print stemmed
from hw1 import Hw1
infilename='review_KcSJUq1kwO8awZRMS6Q49g'
f=open(infilename,'r')
line_num=1
while(line_num<300):
f.readline()
line_num+=1
print 'task-1.py // print out the "text" part of the 300th review'
print Hw1.read_line(f.readline())['text']
from hw1 import Hw1
infilename = 'review_KcSJUq1kwO8awZRMS6Q49g'
f = open(infilename, 'r')
line_num = 1
while (line_num < 300):
f.readline()
line_num += 1
print 'task-1.py // print out the "text" part of the 300th review'
print Hw1.read_line(f.readline())['text']
from hw1 import Hw1
infilename='review_KcSJUq1kwO8awZRMS6Q49g'
f=open(infilename,'r')
line_num=1
while(line_num<3):
line = Hw1.read_line(f.readline())['text']
print "Original: %s" %line
print Hw1.tokenize(line)
line_num+=1
from hw1 import Hw1 infilename = 'review_KcSJUq1kwO8awZRMS6Q49g' f = open(infilename, 'r') tokens = Hw1.tokenize(Hw1.read_line(f.readline())['text']) stop_removed = Hw1.stopword(tokens) stemmed = Hw1.stemming(stop_removed) print 'task-4.py // print out the "text" part of the first review after stemming' print stemmed
from hw1 import Hw1
infilename='review_KcSJUq1kwO8awZRMS6Q49g'
f=open(infilename,'r')
print 'task-2.py // print out the tokenized "text" part of the first 3 reviews'
for i in xrange(0,3):
tokens = Hw1.tokenize(Hw1.read_line(f.readline())['text'])
print tokens
from hw1 import Hw1 infilename = 'review_KcSJUq1kwO8awZRMS6Q49g' hw = Hw1() print 'task-6.py // find the top twenty bigrams in all reviews without stemming' print hw.bigram_count(infilename)
from hw1 import Hw1
infilename='review_KcSJUq1kwO8awZRMS6Q49g'
f=open(infilename,'r')
line_num=1
words = []
while(line_num<2):
line = Hw1.read_line(f.readline())['text']
words = Hw1.tokenize(line)
line_num+=1
print Hw1.stopword(words)