我正在尝试使用scikit-learn/pandas构建一个情绪分析器.构建和评估模型有效,但尝试对新样本文本进行分类则不然.
我的代码:
import csv
import pandas as pd
import numpy as np
from sklearn.model_selection import train_test_split
from sklearn.feature_extraction.text import TfidfVectorizer
from sklearn.naive_bayes import BernoulliNB
from sklearn.metrics import classification_report
from sklearn.metrics import accuracy_score
infile = 'Sentiment_Analysis_Dataset.csv'
data = "SentimentText"
labels = "Sentiment"
class Classifier():
def __init__(self):
self.train_set, self.test_set = self.load_data()
self.counts, self.test_counts = self.vectorize()
self.classifier = self.train_model()
def load_data(self):
df = pd.read_csv(infile, header=0, error_bad_lines=False)
train_set, test_set = train_test_split(df, test_size=.3)
return train_set, test_set
def train_model(self):
classifier = BernoulliNB()
targets = self.train_set[labels]
classifier.fit(self.counts, …我有一个反应组件，它呈现封面列表和一个按钮，用于从单击列表中删除该书。我通过地图调度将删除操作传递给 props，并通过地图状态将书架信息传递给 props。删除操作成功地从数据库中删除了这本书，并且正在影响我的减速器。但即使状态更新，图书列表组件也不会重新渲染（除非重新加载，否则删除的图书不会消失）。
import React from 'react';
import { Link, withRouter } from 'react-router-dom';
import {CarouselProvider, Slider, Slide, ButtonBack, ButtonNext, Image, Dot} from 'pure-react-carousel';
class BookshelfIndexItem extends React.Component {
constructor(props){
super(props);
}
render() {
return(
<div>
<h3 className='shelf-title'>{this.props.bookshelf.name}</h3>
<CarouselProvider
naturalSlideWidth={135}
naturalSlideHeight={250}
totalSlides={this.props.bookshelf.book_ids.length}
visibleSlides={3}>
<Slider style={{height: '240px', display: 'flex', 'justifyContent': 'space-between'}}>
{this.props.bookshelf.book_ids.map((id, index) =>(<Slide index={index}
key={id} style={{'width': '150px','display': 'flex','alignItems': 'center', 'margin': '0 50px'}}>
<Link to={`/books/${id}`}>
<Image style={{height: '200px', width: '140px'}} src ={this.props.books[id].image_url}></Image>
</Link>
<button style={{height: '35px', 'marginLeft': '55px', 'marginTop': '5px'}}
onClick={() …