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71 lines
2.2 KiB
Python
71 lines
2.2 KiB
Python
#!/usr/bin/env python
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"""
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Author : Jaganadh Gopinadhan <jaganadhg@gmail.com>
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Copywright (C) : Jaganadh Gopinadhan
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Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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import sys,os
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import re
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from nltk.corpus import wordnet
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class SentiWordNet(object):
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"""
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Interface to SentiWordNet
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"""
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def __init__(self,swn_file):
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"""
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"""
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self.swn_file = swn_file
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self.pos_synset = self.__parse_swn_file()
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def __parse_swn_file(self):
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"""
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Parse the SentiWordNet file and populate the POS and SynsetID hash
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"""
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pos_synset_hash = {}
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swn_data = open(self.swn_file,'r').readlines()
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head_less_swn_data = filter((lambda line: not re.search(r"^\s*#",\
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line)), swn_data)
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for data in head_less_swn_data:
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fields = data.strip().split("\t")
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try:
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pos,syn_set_id,pos_score,neg_score,syn_set_score,\
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gloss = fields
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except:
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print("Found data without all details")
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pass
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if pos and syn_set_score:
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pos_synset_hash[(pos,int(syn_set_id))] = (float(pos_score),\
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float(neg_score))
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return pos_synset_hash
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def get_score(self,word,pos=None):
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"""
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Get score for a given word/word pos combination
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"""
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senti_scores = []
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synsets = wordnet.synsets(word,pos)
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for synset in synsets:
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if (synset.pos(), synset.offset()) in self.pos_synset:
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pos_val, neg_val = self.pos_synset[(synset.pos(), synset.offset())]
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senti_scores.append({"pos":pos_val,"neg":neg_val,\
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"obj": 1.0 - (pos_val - neg_val),'synset':synset})
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return senti_scores
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