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279 lines
9.4 KiB
Python
279 lines
9.4 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import division
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import re
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import nltk
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import os
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import string
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import xml.etree.ElementTree as ET
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from nltk.corpus import stopwords
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from nltk.corpus import WordNetCorpusReader
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from nltk.stem import wordnet
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from emotion import Emotion as Emo
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from senpy.plugins import EmotionPlugin, AnalysisPlugin, ShelfMixin
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from senpy.models import Results, EmotionSet, Entry, Emotion
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class WNAffect(EmotionPlugin, ShelfMixin):
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'''
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Emotion classifier using WordNet-Affect to calculate the percentage
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of each emotion. This plugin classifies among 6 emotions: anger,fear,disgust,joy,sadness
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or neutral. The only available language is English (en)
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'''
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name = 'emotion-wnaffect'
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author = ["@icorcuera", "@balkian"]
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version = '0.2'
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extra_params = {
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'language': {
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"@id": 'lang_wnaffect',
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'description': 'language of the input',
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'aliases': ['language', 'l'],
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'required': True,
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'options': ['en',]
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}
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}
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synsets_path = "a-synsets.xml"
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hierarchy_path = "a-hierarchy.xml"
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wn16_path = "wordnet1.6/dict"
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onyx__usesEmotionModel = "emoml:big6"
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nltk_resources = ['stopwords', 'averaged_perceptron_tagger', 'wordnet']
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def _load_synsets(self, synsets_path):
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"""Returns a dictionary POS tag -> synset offset -> emotion (str -> int -> str)."""
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tree = ET.parse(synsets_path)
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root = tree.getroot()
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pos_map = {"noun": "NN", "adj": "JJ", "verb": "VB", "adv": "RB"}
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synsets = {}
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for pos in ["noun", "adj", "verb", "adv"]:
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tag = pos_map[pos]
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synsets[tag] = {}
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for elem in root.findall(
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".//{0}-syn-list//{0}-syn".format(pos, pos)):
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offset = int(elem.get("id")[2:])
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if not offset: continue
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if elem.get("categ"):
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synsets[tag][offset] = Emo.emotions[elem.get(
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"categ")] if elem.get(
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"categ") in Emo.emotions else None
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elif elem.get("noun-id"):
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synsets[tag][offset] = synsets[pos_map["noun"]][int(
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elem.get("noun-id")[2:])]
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return synsets
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def _load_emotions(self, hierarchy_path):
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"""Loads the hierarchy of emotions from the WordNet-Affect xml."""
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tree = ET.parse(hierarchy_path)
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root = tree.getroot()
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for elem in root.findall("categ"):
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name = elem.get("name")
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if name == "root":
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Emo.emotions["root"] = Emo("root")
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else:
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Emo.emotions[name] = Emo(name, elem.get("isa"))
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def activate(self, *args, **kwargs):
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self._stopwords = stopwords.words('english')
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self._wnlemma = wordnet.WordNetLemmatizer()
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self._syntactics = {'N': 'n', 'V': 'v', 'J': 'a', 'S': 's', 'R': 'r'}
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local_path = os.environ.get("SENPY_DATA")
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self._categories = {
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'anger': [
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'general-dislike',
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],
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'fear': [
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'negative-fear',
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],
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'disgust': [
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'shame',
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],
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'joy':
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['gratitude', 'affective', 'enthusiasm', 'love', 'joy', 'liking'],
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'sadness': [
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'ingrattitude', 'daze', 'humility', 'compassion', 'despair',
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'anxiety', 'sadness'
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]
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}
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self._wnaffect_mappings = {
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'anger': 'anger',
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'fear': 'negative-fear',
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'disgust': 'disgust',
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'joy': 'joy',
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'sadness': 'sadness'
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}
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self._load_emotions(self.find_file(self.hierarchy_path))
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if 'total_synsets' not in self.sh:
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total_synsets = self._load_synsets(self.find_file(self.synsets_path))
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self.sh['total_synsets'] = total_synsets
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self._total_synsets = self.sh['total_synsets']
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self._wn16_path = self.wn16_path
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self._wn16 = WordNetCorpusReader(self.find_file(self._wn16_path), nltk.data.find(self.find_file(self._wn16_path)))
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def deactivate(self, *args, **kwargs):
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self.save(ignore_errors=True)
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def _my_preprocessor(self, text):
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regHttp = re.compile(
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'(http://)[a-zA-Z0-9]*.[a-zA-Z0-9/]*(.[a-zA-Z0-9]*)?')
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regHttps = re.compile(
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'(https://)[a-zA-Z0-9]*.[a-zA-Z0-9/]*(.[a-zA-Z0-9]*)?')
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regAt = re.compile('@([a-zA-Z0-9]*[*_/&%#@$]*)*[a-zA-Z0-9]*')
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text = re.sub(regHttp, '', text)
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text = re.sub(regAt, '', text)
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text = re.sub('RT : ', '', text)
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text = re.sub(regHttps, '', text)
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text = re.sub('[0-9]', '', text)
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text = self._delete_punctuation(text)
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return text
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def _delete_punctuation(self, text):
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exclude = set(string.punctuation)
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s = ''.join(ch for ch in text if ch not in exclude)
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return s
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def _extract_ngrams(self, text):
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unigrams_lemmas = []
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pos_tagged = []
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unigrams_words = []
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tokens = text.split()
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for token in nltk.pos_tag(tokens):
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unigrams_words.append(token[0])
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pos_tagged.append(token[1])
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if token[1][0] in self._syntactics.keys():
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unigrams_lemmas.append(
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self._wnlemma.lemmatize(token[0], self._syntactics[token[1]
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[0]]))
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else:
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unigrams_lemmas.append(token[0])
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return unigrams_words, unigrams_lemmas, pos_tagged
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def _find_ngrams(self, input_list, n):
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return zip(*[input_list[i:] for i in range(n)])
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def _clean_pos(self, pos_tagged):
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pos_tags = {
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'NN': 'NN',
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'NNP': 'NN',
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'NNP-LOC': 'NN',
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'NNS': 'NN',
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'JJ': 'JJ',
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'JJR': 'JJ',
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'JJS': 'JJ',
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'RB': 'RB',
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'RBR': 'RB',
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'RBS': 'RB',
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'VB': 'VB',
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'VBD': 'VB',
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'VGB': 'VB',
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'VBN': 'VB',
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'VBP': 'VB',
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'VBZ': 'VB'
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}
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for i in range(len(pos_tagged)):
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if pos_tagged[i] in pos_tags:
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pos_tagged[i] = pos_tags[pos_tagged[i]]
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return pos_tagged
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def _extract_features(self, text):
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feature_set = {k: 0 for k in self._categories}
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ngrams_words, ngrams_lemmas, pos_tagged = self._extract_ngrams(text)
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matches = 0
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pos_tagged = self._clean_pos(pos_tagged)
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tag_wn = {
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'NN': self._wn16.NOUN,
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'JJ': self._wn16.ADJ,
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'VB': self._wn16.VERB,
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'RB': self._wn16.ADV
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}
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for i in range(len(pos_tagged)):
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if pos_tagged[i] in tag_wn:
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synsets = self._wn16.synsets(ngrams_words[i],
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tag_wn[pos_tagged[i]])
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if synsets:
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offset = synsets[0].offset()
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if offset in self._total_synsets[pos_tagged[i]]:
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if self._total_synsets[pos_tagged[i]][offset] is None:
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continue
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else:
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emotion = self._total_synsets[pos_tagged[i]][
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offset].get_level(5).name
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matches += 1
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for i in self._categories:
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if emotion in self._categories[i]:
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feature_set[i] += 1
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if matches == 0:
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matches = 1
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for i in feature_set:
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feature_set[i] = (feature_set[i] / matches)
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return feature_set
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def analyse_entry(self, entry, activity):
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params = activity.params
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text_input = entry['nif:isString']
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text = self._my_preprocessor(text_input)
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feature_text = self._extract_features(text)
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emotionSet = EmotionSet(id="Emotions0")
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emotions = emotionSet.onyx__hasEmotion
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for i in feature_text:
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emotions.append(
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Emotion(
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onyx__hasEmotionCategory=self._wnaffect_mappings[i],
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onyx__hasEmotionIntensity=feature_text[i]))
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entry.emotions = [emotionSet]
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yield entry
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def test(self, *args, **kwargs):
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results = list()
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params = {'algo': 'emotion-wnaffect',
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'intype': 'direct',
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'expanded-jsonld': 0,
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'informat': 'text',
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'prefix': '',
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'plugin_type': 'analysisPlugin',
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'urischeme': 'RFC5147String',
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'outformat': 'json-ld',
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'i': 'Hello World',
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'input': 'Hello World',
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'conversion': 'full',
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'language': 'en',
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'algorithm': 'emotion-wnaffect'}
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self.activate()
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texts = {'I hate you': 'anger',
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'i am sad': 'sadness',
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'i am happy with my marks': 'joy',
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'This movie is scary': 'negative-fear'}
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for text in texts:
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response = next(self.analyse_entry(Entry(nif__isString=text),
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self.activity(params)))
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expected = texts[text]
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emotionSet = response.emotions[0]
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max_emotion = max(emotionSet['onyx:hasEmotion'], key=lambda x: x['onyx:hasEmotionIntensity'])
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assert max_emotion['onyx:hasEmotionCategory'] == expected
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