Implementation complete

ADA/server/agent/SA/bert_analyzer.py

@@ -8,6 +8,8 @@ import time
 import numpy as np
 from sklearn import metrics
 
+device = torch.device('cuda')
+
 semeval_2014_test_path = 'data/SemEval-2014/Laptops_Test_Gold.xml'
 amazon_test_path = 'data/Amazon/annotated_amazon_laptop_reviews.xml'
 
@@ -43,13 +45,20 @@ class BertAnalyzer:
                                   collate_fn=generate_batch)
 
         self.net = TDBertNet(len(polarity_indices))
+
+        # initialise GPU
+        self.net.cuda()
+
         optimiser = optim.Adam(self.net.parameters(), lr=LEARNING_RATE)
 
         start = time.time()
 
         for epoch in range(MAX_EPOCHS):
             batch_loss = 0.0
-            for i, (texts, target_indices, labels) in enumerate(train_loader):
+            for i, batch in enumerate(train_loader):
+                # send batch to gpu
+                texts, target_indices, labels = tuple(i.to(device) for i in batch)
+
                 # zero param gradients
                 optimiser.zero_grad()
 
@@ -103,10 +112,14 @@ class BertAnalyzer:
         dataset = BertDataset.from_data(data)
         loader = DataLoader(dataset, batch_size=128, shuffle=False, num_workers=8, collate_fn=generate_batch)
 
+        self.net.cuda()
+        self.net.eval()
+
         predicted = []
         with torch.no_grad():
-            for texts, target_indices, _ in loader:
-                outputs, attentions = self.net(texts, target_indices)
+            for input_ids, attn_mask, target_indices, _ in loader:
+                input_ids, attn_mask, target_indices = tuple(i.to(device) for i in [input_ids, attn_mask, target_indices])
+                outputs = self.net(input_ids, attn_mask, target_indices)
                 batch_val, batch_pred = torch.max(outputs.data, 1)
                 predicted += [BertAnalyzer.get_polarity(val, pred) for val, pred in zip(batch_val, batch_pred)]
 

ADA/server/agent/SA/bert_dataset.py

@@ -12,9 +12,11 @@ MASK_TOKEN = '[MASK]'
 
 
 def generate_batch(batch):
-    texts = tokenizer.batch_encode_plus([entry['tokens'] for entry in batch], add_special_tokens=True,
+    encoded = tokenizer.batch_encode_plus([entry['tokens'] for entry in batch], add_special_tokens=True,
                                         max_length=MAX_SEQ_LEN, pad_to_max_length=True, is_pretokenized=True,
                                         return_tensors='pt')
+    input_ids = encoded['input_ids']
+    attn_mask = encoded['attention_mask']
 
     max_tg_len = max(entry['to'] - entry['from'] for entry in batch)
     target_indices = torch.tensor([[[min(t, entry['to'])] * HIDDEN_OUTPUT_FEATURES
@@ -23,7 +25,7 @@ def generate_batch(batch):
 
     polarity_labels = torch.tensor([entry['polarity'] for entry in batch])
 
-    return texts, target_indices, polarity_labels
+    return input_ids, attn_mask, target_indices, polarity_labels
 
 
 def token_for_char(char_idx, text, tokens):

ADA/server/agent/SA/tdbertnet.py

@@ -11,18 +11,17 @@ class TDBertNet(nn.Module):
 
     def __init__(self, num_class):
         super(TDBertNet, self).__init__()
-        config = BertConfig.from_pretrained(TRAINED_WEIGHTS, output_attentions=True)
+        config = BertConfig.from_pretrained(TRAINED_WEIGHTS)
         self.bert_base = BertModel.from_pretrained(TRAINED_WEIGHTS, config=config)
-        self.bert_base.config.output_attentions = True
         self.fc = nn.Linear(HIDDEN_OUTPUT_FEATURES, num_class)  # n of hidden features, n of output labels
 
-    def forward(self, texts, target_indices):
+    def forward(self, input_ids, attn_mask, target_indices):
         # BERT
-        bert_output, _, attentions = self.bert_base(**texts)
+        bert_output, _ = self.bert_base(input_ids=input_ids, attention_mask=attn_mask)
         # max pooling at target locations
         target_outputs = torch.gather(bert_output, dim=1, index=target_indices)
         pooled_output = torch.max(target_outputs, dim=1)[0]
         # fc layer with softmax activation
         x = F.softmax(self.fc(pooled_output), 1)
-        return x, attentions[-1]
+        return x
 

ADA/server/agent/argument.py

+class Argument:
+
+    def __init__(self, text, polarity, supporters, attackers, phrase, size):
+        self.text = text
+        self.polarity = 'POS' if polarity else 'NEG'
+        self.supporters = supporters
+        self.attackers = attackers
+        self.phrase = phrase.text if phrase else '-'
+        self.size = size

ADA/server/agent/communicator.py

@@ -21,7 +21,7 @@ class Communicator:
     def get_init_message(self):
         prod_node = self.product.root
         prod = self.product.argument_for_node(prod_node)
-        text = ADAText('What would you like to know about the *?', [prod.name])
+        text = ADAText('What would you like to know about this *?', [prod.name])
         queries = self.get_queries(prod_node)
         args = [prod.with_queries(queries)]
         return ADAMessage(text, args)
@@ -75,9 +75,20 @@ class Communicator:
         if query_id == 4 or query_id == 5:
             phrase = (self.framework.best_supporting_phrase(q_arg_node) if query_id == 4
                       else self.framework.best_attacking_phrase(q_arg_node))
-            while phrase[-1] == '.':
-                phrase = phrase[:-1]
-            text = ADAText('\"...*...\"', [phrase], style='QUOT')
+
+            template = ''
+            args = []
+            i = 0
+            for form, start, end in phrase.get_arg_mentions(q_arg_node):
+                template += phrase.text[i:start] + '*'
+                i = end
+                args.append(form)
+            template += phrase.text[i:len(phrase.text)]
+
+            while template[-1] == '.':
+                template = template[:-1]
+
+            text = ADAText('\"...{}...\"'.format(template), args, style='QUOT')
             args = [q_arg_node]
 
         args = [self.product.argument_for_node(arg).with_queries(self.get_queries(arg)) for arg in args]
@@ -106,3 +117,6 @@ class Communicator:
 
     def was_were(self, arg_n):
         return 'was' if self.product.singularities[arg_n] else 'were'
+
+    def get_argument_graph(self):
+        return self.framework.get_argument_graph()

ADA/server/agent/dataloader.py

@@ -2,7 +2,7 @@ import pandas as pd
 
 
 class DataLoader:
-    data_location = 'agent/amazon_data/top_5_mixer_reviews_subset.tsv'
+    data_location = 'agent/amazon_data/reviews.tsv'
     reviews = pd.read_csv(data_location, sep='\t', error_bad_lines=False)
 
     @staticmethod

ADA/server/agent/framework.py

-from anytree import PostOrderIter
+from anytree import PostOrderIter, PreOrderIter
 from functools import reduce
 from agent.SA.bert_analyzer import BertAnalyzer
 from agent.target_extraction.product import Product
 from agent.review import Review
 from agent.dataloader import DataLoader
+from agent.argument import Argument
 import pickle
 import re
+from time import time
 
 
 class Framework:
@@ -19,9 +21,14 @@ class Framework:
         self.arguments = self.product.argument_nodes
         self.features = self.product.feature_nodes
 
+        ts = time()
+
         # get reviews
         review_csv = DataLoader.get_reviews(product_id)
-        reviews = [Review(row, self.product) for _, row in review_csv.iterrows()]
+        reviews = [Review(row, self.product) for _, row in review_csv.head(1000).iterrows()]
+
+        t_feature = time()
+        print('Feature detection took {} seconds'.format(t_feature - ts))
 
         # extract augmented votes
         self.extract_votes(reviews)
@@ -29,15 +36,25 @@ class Framework:
         if len(voting_reviews) / len(reviews) < 0.33:
             print('warning: only a small fraction of reviews generated votes')
 
+        t_sa = time()
+        print('Sentiment analysis took {} seconds'.format(t_sa - t_feature))
+
         # get aggregates
         ra, self.vote_sum, self.vote_phrases = self.get_aggregates(reviews)
 
+        t_ra = time()
+        print('Review aggregation took {} seconds'.format(t_ra - t_sa))
+
         # get qbaf from ra
         self.qbaf, self.argument_polarities = self.get_qbaf(ra, len(reviews))
 
         # apply gradual semantics
         self.strengths = self.get_strengths(self.qbaf)
 
+        te = time()
+        print('QBAF construction took {} seconds'.format(te - t_ra))
+        print('Process took {} seconds'.format(te - ts))
+
         # save
         self.save()
 
@@ -78,7 +95,7 @@ class Framework:
         for review in reviews:
             for phrase in review.phrases:
                 for arg, sentiment in phrase.get_votes().items():
-                    vote_phrases[arg].append({'phrase': phrase.text, 'sentiment': sentiment, 'n_args': len(phrase.args)})
+                    vote_phrases[arg].append(phrase)  # {'phrase': phrase.text, 'sentiment': sentiment, 'n_args': len(phrase.args)}
             for arg, sentiment in review.get_votes().items():
                 ra.append({'review_id': review.id, 'argument': arg, 'vote': sentiment})
                 vote_sum[arg] += sentiment
@@ -187,31 +204,36 @@ class Framework:
         return att is not None and self.strengths[att] > 0
 
     def best_supporting_phrase(self, argument):
-        phrases = {vp['phrase']: vp['sentiment'] for vp in self.supporting_phrases(argument)
-                   if vp['n_args'] == 1 and Framework.is_well_formatted(vp['phrase'])}
+        phrases = [phrase for phrase in self.supporting_phrases(argument)
+                   if phrase.n_args() == 1 and Framework.is_well_formatted(phrase.text)]
         if len(phrases) == 0:
             return None
-        top_5 = list(sorted(phrases.keys(), key=lambda k: phrases[k], reverse=True))[:5]
-        print(top_5)
-        return max(top_5, key=lambda p: len(p))
+        top_5 = list(sorted(phrases, key=lambda p: p.get_vote(argument), reverse=True))[:5]
+        return max(top_5, key=lambda p: len(p.text))
 
     def best_attacking_phrase(self, argument):
-        phrases = {vp['phrase']: vp['sentiment'] for vp in self.attacking_phrases(argument)
-                   if vp['n_args'] == 1 and Framework.is_well_formatted(vp['phrase'])}
+        phrases = [phrase for phrase in self.attacking_phrases(argument)
+                   if phrase.n_args() == 1 and Framework.is_well_formatted(phrase.text)]
         if len(phrases) == 0:
             return None
-        top_5 = list(sorted(phrases.keys(), key=lambda k: phrases[k]))[:5]
-        print(top_5)
-        return max(top_5, key=lambda p: len(p))
+        top_5 = list(sorted(phrases, key=lambda p: p.get_vote(argument)))[:5]
+        return max(top_5, key=lambda p: len(p.text))
 
     @staticmethod
     def is_well_formatted(phrase):
-        if not re.match('^[-a-zA-Z0-9();,./!?\'" ]*$', phrase):
-            print(phrase)
         return re.match('^[-a-zA-Z0-9();,./!?\'" ]*$', phrase)
 
     def supporting_phrases(self, argument):
-        return list(filter(lambda vp: vp['sentiment'] > 0, self.vote_phrases[argument]))
+        return list(filter(lambda phrase: phrase.get_vote(argument) > 0, self.vote_phrases[argument]))
 
     def attacking_phrases(self, argument):
-        return list(filter(lambda vp: vp['sentiment'] < 0, self.vote_phrases[argument]))
+        return list(filter(lambda phrase: phrase.get_vote(argument) < 0, self.vote_phrases[argument]))
+
+    def get_argument_graph(self):
+        return self.create_arg(self.product_node, 120)
+
+    def create_arg(self, arg_node, size):
+        supporters = [self.create_arg(supp_node, size - 20) for supp_node in self.qbaf['supporters'][arg_node]]
+        attackers = [self.create_arg(att_node, size - 20) for att_node in self.qbaf['attackers'][arg_node]]
+        phrase = self.best_supporting_phrase(arg_node) if self.argument_polarities[arg_node] else self.best_attacking_phrase(arg_node)
+        return Argument(arg_node.name, self.argument_polarities[arg_node], supporters, attackers, phrase, size)

ADA/server/agent/prep_metadata.py

 import pandas as pd
 
 pd.set_option('display.max_colwidth', None)
+all_reviews_file = 'amazon_data/reviews.tsv'
 
 
 def get_reviews(category, meta_file, review_file):
@@ -21,7 +22,7 @@ def save_reviews(category, meta_file, review_file, output_file):
     reviews.to_csv(output_file, sep='\t', index=False)
 
 
-def save_top_reviewed_products(n, output_file, product_title, category=None, review_file=None, meta_file=None,
+def save_top_reviewed_products(n, category=None, review_file=None, meta_file=None,
                                product_file=None):
     if product_file:
         reviews = pd.read_csv(product_file, sep='\t')
@@ -33,9 +34,35 @@ def save_top_reviewed_products(n, output_file, product_title, category=None, rev
                                       'reviewText': 'review_body'})
     reviews = reviews[reviews['review_body'].apply(lambda b: not pd.isna(b) and len(b) > 0)]
     reviews = reviews[reviews['star_rating'].apply(lambda r: type(r) is int or r.isdigit())]
-    reviews['product_title'] = product_title
-    reviews.to_csv(output_file, sep='\t', index=False)
 
+    titles = {asin: input('Product title for {}: '.format(asin)) for asin in reviews['product_id'].unique()}
+
+    reviews['product_title'] = reviews['product_id'].apply(lambda asin: titles[asin])
+
+    all_reviews = pd.read_csv(all_reviews_file, sep='\t')
+    all_reviews = pd.concat([all_reviews, reviews])
+    all_reviews.to_csv(all_reviews_file, sep='\t', index=False)
+
+
+def get_top_products_by_brand(n, brand, meta_file, review_file):
+    metadata_iter = pd.read_json(meta_file, lines=True, chunksize=1000)
+    metadata = pd.concat([metadata[metadata['brand'].apply(lambda b: type(b) is str and b == brand)]
+                          for metadata in metadata_iter])
+    print(len(metadata.index))
+    print(metadata.head())
+    print(metadata.columns)
 
-save_top_reviewed_products(5, 'amazon_data/top_5_mixer_reviews.tsv', 'KitchenAid KSM150PSGR Artisan Series 5-Qt. Stand Mixer with Pouring Shield - Imperial Grey',
-                           product_file='target_extraction/data/verified_stand_mixer_reviews.tsv')
+    review_iter = pd.read_json(review_file, lines=True, chunksize=1000)
+    reviews = pd.concat([reviews[reviews['asin'].isin(metadata['asin'])] for reviews in review_iter])
+    print(len(reviews.index))
+
+    top_reviewed = reviews.groupby(['asin'], sort=False).size().sort_values(ascending=False).head(n)
+
+    return top_reviewed
+
+
+def get_product_reviews_for_asin(asin, review_file, output_file):
+    review_iter = pd.read_json(review_file, lines=True, chunksize=1000)
+    reviews = pd.concat([reviews[reviews['asin'].apply(lambda p_asin: p_asin == asin)] for reviews in review_iter])
+    print(len(reviews.index))
+    reviews.to_csv(output_file, sep='\t', index=False)

ADA/server/agent/review.py

 import re
-from nltk.tokenize import word_tokenize, sent_tokenize
+from nltk.tokenize import TreebankWordTokenizer, sent_tokenize
 from agent.SA.bert_dataset import MAX_SEQ_LEN
 from anytree import PostOrderIter
 from nltk.stem import WordNetLemmatizer
 
 wnl = WordNetLemmatizer()
+tokenizer = TreebankWordTokenizer()
 
 
 class Review:
@@ -61,7 +62,8 @@ class Phrase:
     def __init__(self, text, product):
         self.product = product
         self.text = text
-        self.tokens = [word.lower() for word in word_tokenize(text)]
+        self.spans = list(tokenizer.span_tokenize(text))
+        self.tokens = [text[start:end] for start, end in self.spans]
         self.args = self.get_args()
         self.votes = {}
 
@@ -72,7 +74,7 @@ class Phrase:
         while len(arguments) > 0:
             arg = arguments.pop(0)
             for term in self.product.glossary[arg]:
-                matches = [Arg(arg, start, end)
+                matches = [Arg(arg, ' '.join(term), start, end)
                            for start, end in Phrase.matching_subsequences(term, self.tokens)]
                 if matches:
                     argument_matches += matches
@@ -89,8 +91,8 @@ class Phrase:
                 pass
             self.remove_ancestors(node.parent, l)
 
-    def add_arg(self, arg):
-        self.args.append(arg)
+    # def add_arg(self, arg):
+    #     self.args.append(arg)
 
     def num_args(self):
         return len(self.args)
@@ -102,6 +104,20 @@ class Phrase:
                 self.votes[arg.node] = arg.sentiment
         return self.votes
 
+    def get_vote(self, node):
+        return self.votes[node]
+
+    def get_arg_mentions(self, node):
+        mentions = []
+        for arg in self.args:
+            if arg.node == node:
+                start, end = self.spans[arg.start][0], self.spans[arg.end - 1][1]
+                mentions.append((arg.form, start, end))
+        return mentions
+
+    def n_args(self):
+        return len(self.args)
+
     @staticmethod
     def matching_subsequences(l_sub, l):
         sub_idxs = []
@@ -114,8 +130,9 @@ class Phrase:
 
 class Arg:
 
-    def __init__(self, node, start, end):
+    def __init__(self, node, form, start, end):
         self.node = node
+        self.form = form
         self.start = start
         self.end = end
         self.sentiment = None

ADA/server/agent/target_extraction/eval/eval.py

@@ -14,6 +14,14 @@ def get_votes(df):
     return df.apply(lambda row: row['true'] > row['false'], axis=1)
 
 
+def get_votes_for_product(product):
+    for i in range(n_raters):
+        votes = get_votes(get_df(product, i))
+        print(methods[i])
+        print(votes)
+        print('')
+
+
 def get_accuracy(df):
     votes = get_votes(df)
     return sum(1 if vote else 0 for vote in votes) / len(votes) if len(votes) > 0 else None
@@ -45,10 +53,11 @@ def get_kappa():
     return (p - pe) / (1 - pe)
 
 
-# for i in range(3):
-#     print(i)
-#     for prod in products:
-#         print(' ', prod, len(get_df(prod, i)))
-#     print(' ', sum(len(get_df(prod, i)) for prod in products))
+def get_agreement():
+    df = pd.concat(get_df(prod, i) for prod in products for i in range(3)).reset_index(drop=True)
+    agreed = df[df.apply(lambda row: row['true'] == n_raters or row['false'] == n_raters, axis=1)]
+    return len(agreed) / len(df)
+
 
-print_accuracies()
\ No newline at end of file
+for p in products:
+    print(len(get_df(p, 0)))
\ No newline at end of file

ADA/server/agent/target_extraction/target_extractor.py

@@ -6,7 +6,7 @@ from nltk.corpus import stopwords
 from nltk.stem import WordNetLemmatizer
 import string
 from gensim.models.phrases import Phrases, Phraser
-from anytree import Node, RenderTree
+from anytree import Node, RenderTree, PreOrderIter
 import numpy as np
 import re
 from gensim.models import Word2Vec
@@ -18,6 +18,7 @@ from agent.target_extraction.BERT.relation_extractor.pair_rel_dataset import Pai
 from agent.target_extraction.BERT.relation_extractor.bert_rel_extractor import BertRelExtractor
 from pathos.multiprocessing import ProcessingPool as Pool
 import itertools
+from time import time
 
 np.set_printoptions(precision=4, threshold=np.inf, suppress=True)
 stop_words = stopwords.words('english')
@@ -160,9 +161,11 @@ class TargetExtractor:
         self.product = product
         self.file_path = file_path
 
+        ts = time()
+
         print('tokenizing phrases...')
         # tokenize and normalize phrases
-        texts = TargetExtractor.obtain_texts(file_path, text_column, n=200000)
+        texts = TargetExtractor.obtain_texts(file_path, text_column, n=500000)
         self.sentences = list(itertools.chain.from_iterable(pool.map(sent_tokenize, texts)))
         self.sentences = pool.map(lambda s: s.replace('_', ' ').lower(), self.sentences)
         self.phrases = pool.map(word_tokenize, self.sentences)
@@ -179,19 +182,21 @@ class TargetExtractor:
         self.counter = self.count_nouns()
         self.total_count = sum(self.counter.values())
 
-        self.save()
+        t_noun = time()
+        print('Noun extraction took {} seconds'.format(t_noun - ts))
+
+        print('mining aspects...')
+        # mine aspects
+        self.aspects, self.counts = self.get_aspects(self.counter)
+
+        t_feature = time()
+        print('Feature extraction took {} seconds'.format(t_feature - t_noun))
 
         print('training word2vec model...')
         # train word2vec model
         self.wv = self.get_word2vec_model(size=TargetExtractor.WV_SIZE, window=TargetExtractor.WV_WINDOW,
                                           min_count=TargetExtractor.MIN_TERM_COUNT)
 
-        self.save()
-
-        print('mining aspects...')
-        # mine aspects
-        self.aspects, self.counts = self.get_aspects(self.counter)
-
         print('extracting synonyms...')
         # obtain synonyms
         self.syn_dict = self.get_syn_dict()
@@ -201,18 +206,19 @@ class TargetExtractor:
         self.counts = {aspect: sum(self.counts[syn] for syn in self.syn_dict[aspect]) for aspect in self.aspects}
         self.aspects = sorted(self.aspects, key=self.counts.get, reverse=True)
 
-        print(self.syn_dict)
-
-        self.save()
+        t_syn = time()
+        print('Synonym extraction took {} seconds'.format(t_syn - t_feature))
 
         print('extracting relatedness matrix...')
         self.relatedness_matrix = self.get_bert_relations()
 
-        self.save()
-
         print('extracting aspect tree...')
         self.tree = self.get_product_tree3()
 
+        te = time()
+        print('Ontology extraction took {} seconds'.format(te - t_syn))
+        print('Full process took {} seconds'.format(te - ts))
+
         print('saving...')
         self.save()
 
@@ -508,8 +514,3 @@ class Synset:
             if w in group:
                 return group
         return None
-
-
-# for p in ['mixer', 'game', 'necklace', 'watch', 'tv']:
-#     extr = TargetExtractor.load_saved(p)
-#     extr.save_product_representation()

ADA/server/ios_server/urls.py

@@ -4,6 +4,8 @@ from . import views
 
 urlpatterns = [
     path('', views.index, name='index'),
+    path('products/', views.products, name='products'),
     path('product/', views.product, name='product'),
-    path('message/', views.message, name='message')
+    path('message/', views.message, name='message'),
+    path('arguments/', views.arguments, name='arguments')
 ]

ADA/server/ios_server/views.py

@@ -4,46 +4,79 @@ import jsonpickle
 from django.views.decorators.csrf import csrf_exempt
 from agent.dataloader import DataLoader
 from agent.communicator import Communicator
+from time import time
 
 communicators = []  # change into dict with cookie key to support several connections
+product_ids = ['B0000TIKK8', 'B0000TIIPK', 'B000AYW0M2', 'B000AYW0KO', 'B004J30ERI', 'B004VR9HP2',
+               'B00005UP2N', 'B0001HLTTI', 'B00063ULMI', 'B00791QYMQ']
+
+
+class Empty:
+    pass
 
 
 def index(request):
     return HttpResponse("OK")
 
 
+def products(request):
+    product_infos = []
+    for product_id in product_ids:
+        product_title = DataLoader.get_product_name(product_id)
+        star_rating = DataLoader.get_avg_star_rating(product_id)
+        image_url = 'https://ws-na.amazon-adsystem.com/widgets/q?_encoding=UTF8&MarketPlace=US&ASIN=' + product_id + '&ServiceVersion=20070822&ID=AsinImage&WS=1&Format=SL250'
+        product_info = Empty()
+        product_info.id = product_id
+        product_info.name = product_title
+        product_info.starRating = star_rating
+        product_info.imageURL = image_url
+        product_infos.append(product_info)
+
+    return HttpResponse(jsonpickle.encode(product_infos, unpicklable=False), content_type="application/json")
+
+
 def product(request):
+    ts = time()
     product_id = request.GET.get('id', '')
 
-    if not communicators:
-        communicators.append(Communicator(product_id))
+    if communicators:
+        communicators.pop()
+    communicators.append(Communicator(product_id))
     communicator = communicators[0]
 
     init_message = communicator.get_init_message()
+    print('Request took {} seconds'.format(time() - ts))
+    return HttpResponse(jsonpickle.encode(init_message, unpicklable=False), content_type="application/json")
+
+
+@csrf_exempt
+def message(request):
+    parsed = json.loads(request.body)
+    query_id = parsed['queryID']
+    arg_id = parsed['argumentID']
+    response = communicators[0].get_response(query_id, arg_id)
+
+    return HttpResponse(jsonpickle.encode(response, unpicklable=False), content_type="application/json")
+
+
+def arguments(request):
+    product_id = request.GET.get('id', '')
+
+    comm = Communicator(product_id)
+    root = comm.get_argument_graph()
 
     product_title = DataLoader.get_product_name(product_id)
     star_rating = DataLoader.get_avg_star_rating(product_id)
     image_url = 'https://ws-na.amazon-adsystem.com/widgets/q?_encoding=UTF8&MarketPlace=US&ASIN=' + product_id + '&ServiceVersion=20070822&ID=AsinImage&WS=1&Format=SL250'
-
-    class Empty:
-        pass
-
     product_info = Empty()
     product_info.id = product_id
     product_info.name = product_title
     product_info.starRating = star_rating
     product_info.imageURL = image_url
-    init_response = Empty()