[英]Train the model first and Test multiple times
我一直在尝试在我的基于 QT GUI 的 C++ 应用程序中使用 python 的 NLP 脚本。 基本上在应用程序中，我试图通过命令行访问 NLP 脚本：
QString path = "D:/DS Project/Treegramming";
QString command("py");
QStringList params = QStringList() << "nlp.py";
params << text;
QProcess *process = new QProcess();
process->setWorkingDirectory(path);
process->start(command, params);
process->waitForFinished();
QString result = process->readAll();
以上工作完美。 但问题是，执行大约需要 40-50 秒，因为它首先训练模型，然后进行测试。 但我想先训练模型，然后像在 Jupyter Notebook 中一样对其进行多次测试。 为此，我创建了一个单独的函数来测试并尝试使用命令行访问它：
PS D:\\DS Project\\Treegramming> py nlp.py "test('它太棒了')"
但同样，这件事是先执行整个脚本，然后再执行函数。 我能做些什么来解决这个问题吗？
蟒蛇脚本：
# -*- coding: utf-8 -*-
"""
Created on Fri Dec 6 16:18:01 2019
@author: Muhammad Ahmed
"""
import nltk
import sys
import random
import re,string
from nltk.corpus import twitter_samples
from nltk.corpus import stopwords
from nltk.tag import pos_tag
from nltk.tokenize import word_tokenize
from nltk.corpus import twitter_samples
from nltk import classify
from nltk import NaiveBayesClassifier
from nltk import FreqDist
from nltk.stem.wordnet import WordNetLemmatizer
positive_tweets = twitter_samples.strings('positive_tweets.json')
negative_tweets = twitter_samples.strings('negative_tweets.json')
text = twitter_samples.strings('tweets.20150430-223406.json')
tweet_tokens = twitter_samples.tokenized('positive_tweets.json')
def lemmatize_sentence(tokens):
sentence = []
lematizer = WordNetLemmatizer()
for word, tag in pos_tag(tokens):
if tag.startswith('NN'):
pos = 'n'
elif tag.startswith('VB'):
pos = 'v'
else:
pos = 'a'
sentence.append( lematizer.lemmatize( word , pos ) )
return sentence
def remove_noise(tokens , stop_words = ()):
sentence = []
for token, tag in pos_tag( tokens ):
token = re.sub('http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+#]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+' , '',token)
token = re.sub("(@[A-Za-z0-9_]+)","",token)
if tag.startswith("NN"):
pos = 'n'
elif tag.startswith('VB'):
pos = 'v'
else:
pos = 'a'
lemmatizer = WordNetLemmatizer()
token = lemmatizer.lemmatize(token, pos)
if len(token) > 0 and token not in string.punctuation and token.lower() not in stop_words:
sentence.append( token.lower() )
return sentence
def get_all_words(tokens_list):
for tokens in tokens_list:
for token in tokens:
yield token
def get_tweets_for_model(tokens_list):
for tweets in tokens_list:
yield dict([token,True] for token in tweets)
stop_words = stopwords.words('english')
positive_tweet_tokens = twitter_samples.tokenized('positive_tweets.json')
negative_tweet_tokens = twitter_samples.tokenized('negative_tweets.json')
positive_cleaned_tokens_list = []
negative_cleaned_tokens_list = []
for tokens in positive_tweet_tokens:
positive_cleaned_tokens_list.append(remove_noise(tokens, stop_words))
for tokens in negative_tweet_tokens:
negative_cleaned_tokens_list.append(remove_noise(tokens, stop_words))
all_pos_words = get_all_words( positive_cleaned_tokens_list )
all_neg_words = get_all_words( negative_cleaned_tokens_list )
freq_dis_pos = FreqDist( all_pos_words )
freq_dis_neg = FreqDist( all_neg_words )
positive_tokens_for_model = get_tweets_for_model(positive_cleaned_tokens_list)
negative_tokens_for_model = get_tweets_for_model(negative_cleaned_tokens_list)
pos_dataset = [(tweets,"Positive") for tweets in positive_tokens_for_model]
neg_dataset = [(tweets,"Negative") for tweets in negative_tokens_for_model]
dataset = pos_dataset + neg_dataset
random.shuffle(dataset)
train_data = dataset[:7000]
test_data = dataset[7000:]
classifier = NaiveBayesClassifier.train(train_data)
def test( custom_tweet ):
custom_tokens = remove_noise(word_tokenize(custom_tweet))
res = classifier.classify(dict([token, True] for token in custom_tokens))
print(res)
f = open( "result.txt" , "w" )
f.write(res)
f.close()
eval( sys.argv[1] );
您需要创建两个 python 脚本：
为了防止重复代码，我将为有用的函数创建一个脚本，并将其utils.py ，它应该如下所示：
import re
import string
from nltk.tag import pos_tag
from nltk.stem.wordnet import WordNetLemmatizer
def lemmatize_sentence(tokens):
sentence = []
lematizer = WordNetLemmatizer()
for word, tag in pos_tag(tokens):
if tag.startswith('NN'):
pos = 'n'
elif tag.startswith('VB'):
pos = 'v'
else:
pos = 'a'
sentence.append( lematizer.lemmatize( word , pos ) )
return sentence
def remove_noise(tokens , stop_words = ()):
sentence = []
for token, tag in pos_tag( tokens ):
token = re.sub('http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+#]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+' , '',token)
token = re.sub("(@[A-Za-z0-9_]+)","",token)
if tag.startswith("NN"):
pos = 'n'
elif tag.startswith('VB'):
pos = 'v'
else:
pos = 'a'
lemmatizer = WordNetLemmatizer()
token = lemmatizer.lemmatize(token, pos)
if len(token) > 0 and token not in string.punctuation and token.lower() not in stop_words:
sentence.append( token.lower() )
return sentence
def get_all_words(tokens_list):
for tokens in tokens_list:
for token in tokens:
yield token
def get_tweets_for_model(tokens_list):
for tweets in tokens_list:
yield dict([token,True] for token in tweets)
然后让我们创建训练脚本，我将其train.py ，它应该如下所示：
import random
import pickle
from utils import *
from nltk import FreqDist
from nltk.corpus import stopwords
from nltk import NaiveBayesClassifier
from nltk.corpus import twitter_samples
positive_tweets = twitter_samples.strings('positive_tweets.json')
negative_tweets = twitter_samples.strings('negative_tweets.json')
text = twitter_samples.strings('tweets.20150430-223406.json')
tweet_tokens = twitter_samples.tokenized('positive_tweets.json')
stop_words = stopwords.words('english')
positive_tweet_tokens = twitter_samples.tokenized('positive_tweets.json')
negative_tweet_tokens = twitter_samples.tokenized('negative_tweets.json')
positive_cleaned_tokens_list = []
negative_cleaned_tokens_list = []
for tokens in positive_tweet_tokens:
positive_cleaned_tokens_list.append(remove_noise(tokens, stop_words))
for tokens in negative_tweet_tokens:
negative_cleaned_tokens_list.append(remove_noise(tokens, stop_words))
all_pos_words = get_all_words( positive_cleaned_tokens_list )
all_neg_words = get_all_words( negative_cleaned_tokens_list )
freq_dis_pos = FreqDist( all_pos_words )
freq_dis_neg = FreqDist( all_neg_words )
positive_tokens_for_model = get_tweets_for_model(positive_cleaned_tokens_list)
negative_tokens_for_model = get_tweets_for_model(negative_cleaned_tokens_list)
pos_dataset = [(tweets,"Positive") for tweets in positive_tokens_for_model]
neg_dataset = [(tweets,"Negative") for tweets in negative_tokens_for_model]
dataset = pos_dataset + neg_dataset
random.shuffle(dataset)
train_data = dataset[:7000]
test_data = dataset[7000:]
classifier = NaiveBayesClassifier.train(train_data)
#### ADD THESE TO SAVE THE CLASSIFIER ####
with open("model.pickle", "wb") as fout:
pickle.dump(classifier, fout)
最后，测试脚本test.py应如下所示：
import sys
import pickle
from nltk import classify
from nltk.tokenize import word_tokenize
from utils import remove_noise
#### ADD THESE TO LOAD THE CLASSIFIER ####
with open('model.pickle', 'rb') as fin:
classifier = pickle.load(fin)
def test( custom_tweet ):
custom_tokens = remove_noise(word_tokenize(custom_tweet))
res = classifier.classify(dict([token, True] for token in custom_tokens))
print(res)
f = open( "result.txt" , "w" )
f.write(res)
f.close()
eval( sys.argv[1] );
现在，运行train.py一次以训练朴素贝叶斯分类器，该分类器将创建一个名为model.pickle的新文件，该文件包含经过训练的分类器。 然后在您的自定义推文上从您的 C++ 应用程序运行test.py test.py应该model.pickle经过训练的模型model.pickle并在给定的自定义推文上使用它。
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