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esn_ngram_analyze.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# File : core.classifiers.RCNLPTextClassifier.py
# Description : Echo State Network for text classification.
# Auteur : Nils Schaetti <nils.schaetti@unine.ch>
# Date : 01.02.2017 17:59:05
# Lieu : Nyon, Suisse
#
# This file is part of the Reservoir Computing NLP Project.
# The Reservoir Computing Memory Project is a set of free software:
# you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Foobar is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with Foobar. If not, see <http://www.gnu.org/licenses/>.
#
import io
import os
import argparse
import pickle
import numpy as np
import spacy
from scipy import stats
from core.converters.PosConverter import PosConverter
from core.converters.TagConverter import TagConverter
from core.converters.WVConverter import WVConverter
from core.converters.FuncWordConverter import FuncWordConverter
from core.classifiers.EchoWordClassifier import EchoWordClassifier
from core.classifiers.SLTextClassifier import SLTextClassifier
from core.classifiers.TFIDFTextClassifier import TFIDFTextClassifier
from core.classifiers.SL2GramTextClassifier import SL2GramTextClassifier
from core.classifiers.TFIDF2GramTextClassifier import TFIDF2GramTextClassifier
from core.tools.RCNLPLogging import RCNLPLogging
from core.tools.Metrics import Metrics
#########################################################################
# Experience settings
#########################################################################
# Exp. info
ex_name = "Echo Word Prediction Experience"
ex_instance = "ESN ngram analyze"
# Reservoir Properties
rc_leak_rate = 1.0 # Leak rate
rc_input_scaling = 0.25 # Input scaling
rc_size = 50 # Reservoir size
rc_spectral_radius = 0.9 # Spectral radius
rc_w_sparsity = 0.1
rc_input_sparsity = 0.1
####################################################
# Main function
####################################################
if __name__ == "__main__":
# Argument parser
parser = argparse.ArgumentParser(description="RCNLP - ESN ngram analyze")
# Argument
parser.add_argument("--dataset", type=str, help="Dataset's directory")
parser.add_argument("--lang", type=str, help="Language (ar, en, es, pt)", default='en')
parser.add_argument("--converter", type=str, help="The text converter to use (fw, pos, tag, wv)", default='pos')
parser.add_argument("--pca-model", type=str, help="PCA model to load", default=None)
parser.add_argument("--in-components", type=int, help="Number of principal component to reduce inputs to",
default=-1)
parser.add_argument("--k", type=int, help="n-Fold Cross Validation", default=10)
parser.add_argument("--samples", type=int, help="Number of reservoir to sample", default=50)
args = parser.parse_args()
# Argument
args = parser.parse_args()
# Logging
logging = RCNLPLogging(exp_name=ex_name, exp_inst=ex_instance,
exp_value=RCNLPLogging.generate_experience_name(locals()))
logging.save_globals()
logging.save_variables(locals())
# PCA model
pca_model = None
if args.pca_model != "":
pca_model = pickle.load(open(args.pca_model, 'r'))
# end if
# Choose a text to symbol converter
if args.converter == "pos":
converter = PosConverter(resize=args.in_components, pca_model=pca_model)
elif args.converter == "tag":
converter = TagConverter(resize=args.in_components, pca_model=pca_model)
elif args.converter == "fw":
converter = FuncWordConverter(resize=args.in_components, pca_model=pca_model)
else:
converter = WVConverter(resize=args.in_components, pca_model=pca_model)
# end if
# Prepare training and test set indexes.
n_fold_samples = int(100 / args.k)
indexes = np.arange(0, 100, 1)
indexes.shape = (args.k, n_fold_samples)
# Create Echo Word Classifier
classifier = EchoWordClassifier(classes=[0, 1], size=rc_size, input_scaling=rc_input_scaling,
leak_rate=rc_leak_rate,
input_sparsity=rc_input_sparsity, converter=converter,
spectral_radius=rc_spectral_radius, w_sparsity=rc_w_sparsity)
# Array for results
success_rates = np.zeros(args.k)
# k-Fold cross validation
for k in range(0, args.k):
# Prepare training and test set.
test_set_indexes = indexes[k]
training_set_indexes = indexes
training_set_indexes = np.delete(training_set_indexes, k, axis=0)
training_set_indexes.shape = (100 - n_fold_samples)
# Add examples
for author_index, author_id in enumerate((args.author1, args.author2)):
author_path = os.path.join(args.dataset, "total", author_id)
for file_index in training_set_indexes:
file_path = os.path.join(author_path, str(file_index) + ".txt")
classifier.train(io.open(file_path, 'r').read(), author_index)
# end for
# end for
# Finalize model training
classifier.finalize(verbose=False)
# Init test epoch
test_set = list()
# Get text
for author_index, author_id in enumerate((args.author1, args.author2)):
author_path = os.path.join(args.dataset, "total", str(author_id))
for file_index in test_set_indexes:
file_path = os.path.join(author_path, str(file_index) + ".txt")
# Document success rate
if not args.sentence:
test_set.append((io.open(file_path, 'r').read(), author_index))
else:
# Sentence success rate
nlp = spacy.load(args.lang)
doc = nlp(io.open(file_path, 'r').read())
for sentence in doc.sents:
test_set.append((sentence, author_index))
# end for
# end if
# end for
# end for
# Success rate
success_rate = Metrics.success_rate(classifier, test_set, verbose=False)
print(u"{} - Success rate : {}".format(k, success_rate))
# Save result
success_rates[k] = success_rate
# Reset classifier
classifier.reset()
# end for
# end for
# Log success
logging.save_results(u"Success rate ", np.average(success_rates), display=True)
logging.save_results(u"Success rate std ", np.std(success_rates), display=True)
# end if