def prepare_for_summarisation(self, filename, visualise=False):
"""
Prepares a paper to be summarised by the Word2Vec method.
:param filename: the filename of the paper to summarise
:param visualise: true if visualising
:return: the paper in a form suitable to be summarised with the trained models.
"""
sentences = self.paper2orderedlist(filename)
# Final form will be an ordered list of tuples, where each tuple shall have the form
# (sentence_text, sentence_vector, abstract_vector, features).
final_form = []
raw_paper = useful_functions.read_in_paper(filename, sentences_as_lists=True)
abstract = raw_paper["ABSTRACT"]
abs_vector = self.abstract2vector(abstract)
prev_section = ""
try:
bow = self.paper_bags_of_words[filename]
except KeyError:
paper_str = useful_functions.read_in_paper(filename)
paper_str = " ".join([val for _, val in paper_str.iteritems()]).lower()
paper_bag_of_words = useful_functions.calculate_bag_of_words(paper_str)
self.paper_bags_of_words[filename] = paper_bag_of_words
try:
kf = self.keyphrases[filename]
except KeyError:
kfs = raw_paper["KEYPHRASES"]
self.keyphrases[filename] = kfs
for sentence, section in sentences:
sentence_vector = useful_functions.sentence2vec(sentence, self.word2vec)
features = self.calculate_features(sentence,
self.paper_bags_of_words[filename],
self.keyphrases[filename],
[" ".join(x) for x in abstract],
" ".join(raw_paper["MAIN-TITLE"][0]),
section,
shorter=True)
if not visualise:
final_form.append((sentence, sentence_vector, abs_vector, features))
else:
if prev_section != section:
print("----> Adding section: ", section)
final_form.append(([section], np.zeros_like(sentence_vector), np.zeros_like(sentence_vector), np.zeros_like(features)))
prev_section = section
final_form.append((sentence, sentence_vector, abs_vector, features))
return final_form
def prepare_paper(self, filename):
"""
Prepares the paper for summarisation.
:return: The paper in a form suitable for summarisation
"""
paper = useful_functions.read_in_paper(filename, sentences_as_lists=True, preserve_order=True)
return paper
def paper2orderedlist(self, filename):
"""
Performs the first task necessary to summarise a paper: turning it into an ordered list of sentences which
doesn't include the highlights or abstract section of the paper (as these are already summaries).
:param filename: the filename to summarise.
:return: the paper as an ordered list of sentences, not including abstract or highlights.
"""
paper = useful_functions.read_in_paper(filename, sentences_as_lists=True, preserve_order=True)
# We don't want to make any predictions for the Abstract or Highlights as these are already summaries.
sections_to_predict_for = []
for section, text in paper.iteritems():
if section != "ABSTRACT" and section != "HIGHLIGHTS":
sections_to_predict_for.append(text)
# Sorts the sections according to the order in which they appear in the paper.
sorted_sections_to_predict_for = sorted(sections_to_predict_for, key=itemgetter(1))
# Creates an ordered list of the sentences in the paper
sentence_list = []
for sentence_text, section_position_in_paper in sorted_sections_to_predict_for:
section_sentences = sentence_text
for sentence in section_sentences:
sentence_list.append(sentence)
return sentence_list
def dump_keyphrases_pkl(out_file):
files = os.listdir(BASE_DIR +
"Data/Papers/Full/Papers_With_Section_Titles/")
keyphrases = {}
for file in files:
paper = useful_functions.read_in_paper(file, sentences_as_lists=False)
keyphrases[file] = paper["KEYPHRASES"]
write_pkl(keyphrases, out_file)
def dump_bow_pkl(out_file):
files = os.listdir(BASE_DIR +
"Data/Papers/Full/Papers_With_Section_Titles/")
bow = {}
for file in files:
paper = useful_functions.read_in_paper(file, sentences_as_lists=False)
paper_string = " ".join(v for k, v in paper.iteritems())
bow[file] = useful_functions.calculate_bag_of_words(paper_string)
write_pkl(bow, out_file)
preserve_order=True)
return paper
if __name__ == "__main__":
# Paper One: S0168874X14001395.txt
# Paper Two: S0141938215300044.txt
# Paper Three: S0142694X15000423.txt
summ = AbstractRougeSummariser()
#summ.summarise("S0142694X15000423.txt")
count = 0
for filename in os.listdir(PAPER_SOURCE):
if count > 150:
break
if filename.endswith(".txt") and count > 0:
# We need to write the highlights as a gold summary with the same name as the generated summary.
highlights = useful_functions.read_in_paper(filename,
True)["HIGHLIGHTS"]
useful_functions.write_gold(SUMMARY_WRITE_LOC, highlights,
filename)
# Display a loading bar of progress
useful_functions.loading_bar(LOADING_SECTION_SIZE, count,
NUMBER_OF_PAPERS)
# Generate and write a summary
summ.summarise(filename)
count += 1
tf_idfs.append(word_tf_idf)
return [x for x in zip(sentence, tf_idfs)]
with open(BASE_DIR + "/Visualisations/base_html.txt", "rb") as f:
html = f.readlines()
html.append("<body>\n")
html.append("<div class=\"container\">\n")
html.append("<div id=\"title\" class=\"text\">")
filename = "S0920548915000744.txt"
paper = useful_functions.read_in_paper(filename,
sentences_as_lists=True,
preserve_order=True)
html.append("<h1>" + " ".join(paper["MAIN-TITLE"][0][0]) + "</h1>")
html.append("</div>")
html.append("<div id=\"gold\" class=\"text\">")
html.append("<h2>Human Written Summary</h2>")
html.append("<hr>")
html.append("<br>")
html.append("<p>")
highlights = paper["HIGHLIGHTS"]
print("Reading stuff...")
bag_of_words = defaultdict(float)
for key, val in paper.iteritems():
sents = val[0]
def process_paper(filename):
"""
The concurrent function which processes each paper into its training data format.
:param filename: the filename of the paper to process.
:return: none, but write the preprocessed file to "Data/Training_Data/"
"""
#print("--> Started processing ", filename)
# Start time
start_time = time.time()
# Read in the paper
paper = useful_functions.read_in_paper(filename, sentences_as_lists=True)
# Extract the gold summary
gold = paper["HIGHLIGHTS"]
gold_string_list = [" ".join(x) for x in gold]
# Extract the title
title = paper["MAIN-TITLE"][0]
title_string = " ".join(title)
# Extract the abstract
abstract = paper["ABSTRACT"]
abstract_string_list = [" ".join(x) for x in abstract]
# Extract the keyphrases
try:
keyphrases = paper["KEYPHRASES"][0]
except IndexError:
keyphrases = []
# Turn the paper into a single string and calculate the bag of words score
paper_string = " ".join([" ".join(x) for key, val in paper.iteritems() for x in val])
bag_of_words = useful_functions.calculate_bag_of_words(paper_string)
# Get the paper as a list of sentences, associating each sentence with its section name - will be used by oracle
# to find best summary sentences.
paper_sentences = [(" ".join(x), key) for key, val in paper.iteritems() for x in val
if key != "ABSTRACT"]
# Create a list of sentences, their ROUGE-L scores with the Highlights and the section they occur in
# (as a string)
sents_scores_secs = []
for sentence, section in paper_sentences:
# For some reason the candidate sentence needs to be the only item in a list
r_score = rouge.calc_score([sentence], gold_string_list)
sents_scores_secs.append((sentence.split(" "), r_score, section))
# Sort the sentences, scores and sections into descending order
sents_scores_secs = sorted(sents_scores_secs, key=itemgetter(1), reverse=True)
pos_sents_scores_secs = sents_scores_secs[:num_summary]
neg_sents_scores_secs = sents_scores_secs[num_summary:]
if len(neg_sents_scores_secs) < len(pos_sents_scores_secs):
print("{}**** NOT A SUFFICIENT AMOUNT OF DATA IN PAPER {}, IGNORING PAPER ****{}".format(
Color.RED, filename, Color.END))
return
# Positive sentences
positive_sents_secs_class = [(sent, sec, 1) for sent, _, sec in pos_sents_scores_secs]
# Negative sentences
# Take the sentences not used as positive and reverse it to have worst scores first then take an equal number
neg_sents_scores_secs = [x for x in reversed(neg_sents_scores_secs)][:len(positive_sents_secs_class)]
negative_sents_secs_class = [(sent, sec, 0) for sent, _, sec in neg_sents_scores_secs]
# Don't create data from this paper if it's less than 40 sentences - i.e. there would be more positive than
# negative data. The data needs to be balanced.
#if len(positive_sents_secs_class) != len(negative_sents_secs_class):
# print("{}**** NOT A SUFFICIENT AMOUNT OF DATA IN PAPER {}, IGNORING PAPER ****{}".format(
# Color.RED, filename, Color.END))
# return
# Concatenate the positive and negative sentences into a single data item and shuffle it
data = positive_sents_secs_class + negative_sents_secs_class
random.shuffle(data)
# Average word vectors of each sentence and convert to list for JSON serialisation
sentvecs_secs_class = [(useful_functions.sentence2vec(sent).tolist(), sec, y) for sent, sec, y in data]
# Calculate features for each sentence
features = [useful_functions.calculate_features(sent, bag_of_words, document_wordcount, keyphrases,
abstract_string_list, title_string, sec)
for sent, sec, y in data]
# Calculate abstract vector
abs_vector = useful_functions.abstract2vector(abstract_string_list).tolist()
# Description of the data
description_text = "All text is of the form of a list of lists, where each sentence is a list of words. The" \
" sentences are of the form [(sentence (as a list of words), section in paper," \
" classification)]. The sentence vectors are of a similar form, except the sentence text is" \
" replaced with the vector representation of the sentence. The features are of the form " \
"[(AbstractROUGE, TF-IDF, Document_TF-IDF, keyphrase_score, title_score, numeric_score," \
" sentence_length, section)]. The dimensions of each sentence vector are [1x100]. The " \
"abstract vector is a single [1x100] vector also."
# The data item that will be written for this paper
data_item = {
"filename": filename,
"gold": gold,
"title": paper["MAIN-TITLE"],
"abstract": abstract,
"abstract_vec": abs_vector,
"sentences": data,
"sentence_vecs": sentvecs_secs_class,
"sentence_features": features,
"description": description_text
}
# Write the data out
with open(TRAINING_DATA_WRITE_LOC + filename.strip(".txt") + ".json", "wb") as f:
json.dump(data_item, f)
print("--> Finished processing {}, took {} seconds, data length: {}.".format(
filename, (time.time() - start_time), len(data)))
def prepare_data(self):
"""
Puts the data in a form suitable for the Word2Vec classifier - it changes each sentence into the average of
its constituent word vectors.
:return: all sentences as vectors and their classification (data is balanced).
"""
# Count of how many papers have been processed.
count = 0
# Sentences as vectors with their classification
data = []
# Count of positive data
pos_count = 0
# Count of negative data
neg_count = 0
r = Rouge()
# Iterate over every file in the paper directory
for filename in os.listdir(PAPER_SOURCE):
# Ignores files which are not papers e.g. hidden files
if filename.endswith(".txt"):
# Display a loading bar of progress
useful_functions.loading_bar(self.loading_section_size, count,
self.number_of_papers)
count += 1
# Opens the paper as a dictionary, with keys corresponding to section titles and values corresponding
# to the text in that section. The text is given as a list of lists, each list being a list of words
# corresponding to a sentence.
paper = useful_functions.read_in_paper(filename,
sentences_as_lists=True)
# Get the highlights of the paper
highlights = paper["HIGHLIGHTS"]
highlights_join = [" ".join(x) for x in highlights]
abstract = paper["ABSTRACT"]
sentences = []
# Iterate over the whole paper
for section, sents in paper.iteritems():
# Iterate over each sentence in the section
for sentence in sents:
# We don't want to calculate ROUGE for the abstract
if section != "ABSTRACT":
# Calculate the ROUGE score and add it to the list
r_score = r.calc_score([" ".join(sentence)],
highlights_join)
sentences.append((sentence, r_score, section))
sentences = [(x, section) for x, score, section in reversed(
sorted(sentences, key=itemgetter(1)))]
sents_pos = sentences[0:self.num_summary]
sents_neg = sentences[self.num_summary:]
if len(sents_neg) < len(sents_pos):
continue
sents_pos = [(x[0], x[1], y)
for x, y in zip(sents_pos, [1] * len(sents_pos))]
sents_neg = [x for x in reversed(sents_neg)][:len(sents_pos)]
sents_neg = [(x[0], x[1], y)
for x, y in zip(sents_neg, [0] * len(sents_neg))]
sents_class = sents_pos + sents_neg
random.shuffle(sents_class)
# Each item in the sentence list has form [(sentence, section, classification)]
paper = {
"filename":
filename,
"title":
paper["MAIN-TITLE"],
"gold":
paper["HIGHLIGHTS"],
"abstract":
abstract,
"sentences":
sents_class,
"description":
"All text data is given in the form of a list of words."
}
data.append(paper)
if count % 1000 == 0:
print("\nWriting data...")
write_dir = BASE_DIR + "/Data/Generated_Data/Sentences_And_SummaryBool/Abstract_Neg/AbstractNet/"
with open(write_dir + "data.pkl", "wb") as f:
pickle.dump(data, f)
print("Done")
return data
