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# -*- coding: utf-8 -*- |
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from __future__ import unicode_literals |
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from processors.utils import is_string, post_json |
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from processors.ds import Sentence, Document |
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from processors.annotators import Message, SegmentedMessage |
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import json |
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class SentimentAnalysisAPI(object): |
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""" |
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API for performing sentiment analysis |
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Parameters |
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---------- |
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address : str |
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The base address for the API (i.e., everything preceding `/api/..`) |
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Attributes |
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---------- |
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corenlp : processors.sentiment.CoreNLPSentimentAnalyzer |
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Service using [`CoreNLP`'s tree-based system](https://nlp.stanford.edu/~socherr/EMNLP2013_RNTN.pdf) for performing sentiment analysis. |
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""" |
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def __init__(self, address): |
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self._service = address |
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self.corenlp = CoreNLPSentimentAnalyzer(self._service) |
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class SentimentAnalyzer(object): |
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def __init__(self, address): |
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self._service = "{}/api/sentiment/score".format(address) |
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self._text_service = self._service |
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self._segmented_service = self._service |
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self._sentence_service = self._service |
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self._document_service = self._service |
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def score_document(self, doc): |
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""" |
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Sends a Document to the server for sentiment scoring. |
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Parameters |
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---------- |
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doc : processors.ds.Document |
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The `doc` to be scored |
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Returns |
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------- |
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[int] |
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A list of int scores (one for each sentence) ranging from 1 (very negative) to 5 (very positive) |
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""" |
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try: |
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sentiment_scores = post_json(self._document_service, doc.to_JSON()) |
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return sentiment_scores["scores"] |
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except Exception as e: |
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#print(e) |
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return None |
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def score_sentence(self, sentence): |
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""" |
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Sends a Sentence to the server for sentiment scoring. |
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Parameters |
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---------- |
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sentence : processors.ds.Sentence |
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The `sentence` to be scored |
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Returns |
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------- |
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int |
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A single score ranging from 1 (very negative) to 5 (very positive) |
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""" |
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try: |
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sentiment_scores = post_json(self._sentence_service, sentence.to_JSON()) |
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return sentiment_scores["scores"][0] |
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except Exception as e: |
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print(e) |
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return None |
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def score_segmented_text(self, sentences): |
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""" |
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Sends segmented text to the server for sentiment scoring. |
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Parameters |
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---------- |
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sentences : [str] |
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A list of str representing segmented sentences/chunks to be scored. |
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Returns |
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------- |
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[int] |
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A list of int scores (one for each sentence/chunk) ranging from 1 (very negative) to 5 (very positive) |
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""" |
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try: |
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msg = SegmentedMessage(sentences) |
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sentiment_scores = post_json(self._segmented_service, msg.to_JSON()) |
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return sentiment_scores["scores"] |
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except Exception as e: |
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#print(e) |
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return None |
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def score_text(self, text): |
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""" |
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Sends text to the server for sentiment scoring |
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Returns a list of scores (one for each sentence) |
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""" |
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service = self._text_service |
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try: |
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msg = Message(text) |
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sentiment_scores = post_json(self._text_service, msg.to_JSON()) |
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return sentiment_scores["scores"] |
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except Exception as e: |
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#print(e) |
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return None |
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def score(self, data): |
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""" |
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Sniff out data type and assemble corresponding message to send to the server for sentiment scoring |
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Parameters |
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---------- |
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data : str or [str] or processors.ds.Sentence or processors.ds.Document |
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The data to be scored for sentiment polarity. |
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""" |
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if is_string(data): |
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return self.score_text(data) |
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elif isinstance(data, Sentence): |
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return self.score_sentence(data) |
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elif isinstance(data, Document): |
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return self.score_document(data) |
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# a list of pre segmented sentences |
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elif isinstance(data, list): |
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return self.score_segmented_text(data) |
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else: |
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#print("Type of data: {}".format(type(data))) |
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return None |
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class CoreNLPSentimentAnalyzer(SentimentAnalyzer): |
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""" |
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Bridge to [`CoreNLP`'s tree-based sentiment analysis system](https://nlp.stanford.edu/~socherr/EMNLP2013_RNTN.pdf) |
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""" |
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def __init__(self, address): |
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self._service = "{}/api/sentiment/corenlp/score".format(address) |
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self._text_service = self._service |
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self._segmented_service = self._service |
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self._sentence_service = self._service |
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self._document_service = self._service |
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clu-ling /
py-processors
