百度PY-Day5理论课课堂笔记

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目录:

百度PY-Day5理论课课堂笔记

EasyDL概述

百度PY-Day5理论课课堂笔记
百度PY-Day5理论课课堂笔记
百度PY-Day5理论课课堂笔记
百度PY-Day5理论课课堂笔记
百度PY-Day5理论课课堂笔记
百度PY-Day5理论课课堂笔记
百度PY-Day5理论课课堂笔记

EasyDL体验

百度PY-Day5理论课课堂笔记
创建、上传数据集:
百度PY-Day5理论课课堂笔记
图片演示:
百度PY-Day5理论课课堂笔记
结果反馈:
百度PY-Day5理论课课堂笔记

EasyDL应用案例

百度PY-Day5理论课课堂笔记
百度PY-Day5理论课课堂笔记
百度PY-Day5理论课课堂笔记
百度PY-Day5理论课课堂笔记
百度PY-Day5理论课课堂笔记

大作业:数据爬取、分析与内容审核

百度PY-Day5理论课课堂笔记
爬取数据的要点:
百度PY-Day5理论课课堂笔记

即:所有评论不会直接显示到默认页面元素中,每次点击更多评论按钮时就会新加载一个get_comments文件请求,我们要从此处着手分析。

请求该资源,可得下图所示资源:
百度PY-Day5理论课课堂笔记
百度PY-Day5理论课课堂笔记
老师介绍了last_id的作用是记录当前评论加载的位置,即作为下一个请求中的一个参数,是得下一个请求从当前位置继续加载。

因此,我们可尝试不断获取last_id,从而生成新的URL,再去获取新的评论。

反复如此,便可模拟用户点击“查看更多评论”的操作。

大作业参考结果

百度PY-Day5理论课课堂笔记

实操:

第一步:爱奇艺《青春有你2》评论数据爬取(参考链接:https://www.iqiyi.com/v_19ryfkiv8w.html#curid=15068699100_9f9bab7e0d1e30c494622af777f4ba39)

  • 爬取任意一期正片视频下评论
  • 评论条数不少于1000条

第二步:词频统计并可视化展示

  • 数据预处理:清理清洗评论中特殊字符(如:@#¥%、emoji表情符),清洗后结果存储为txt文档
  • 中文分词:添加新增词(如:青你、奥利给、冲鸭),去除停用词(如:哦、因此、不然、也好、但是)
  • 统计top10高频词
  • 可视化展示高频词

第三步:绘制词云

  • 根据词频生成词云
  • 可选项-添加背景图片,根据背景图片轮廓生成词云

第四步:结合PaddleHub,对评论进行内容审核

需要的配置和准备

  • 中文分词需要jieba
  • 词云绘制需要wordcloud
  • 可视化展示中需要的中文字体
  • 网上公开资源中找一个中文停用词表
  • 根据分词结果自己制作新增词表
  • 准备一张词云背景图(附加项,不做要求,可用hub抠图实现)
  • paddlehub配置
!pip install jieba
!pip install wordcloud
Looking in indexes: https://pypi.mirrors.ustc.edu.cn/simple/
Requirement already satisfied: jieba in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (0.42.1)
Looking in indexes: https://pypi.mirrors.ustc.edu.cn/simple/
Requirement already satisfied: wordcloud in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (1.6.0)
Requirement already satisfied: numpy>=1.6.1 in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (from wordcloud) (1.16.4)
Requirement already satisfied: matplotlib in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (from wordcloud) (2.2.3)
Requirement already satisfied: pillow in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (from wordcloud) (6.2.0)
Requirement already satisfied: pytz in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (from matplotlib->wordcloud) (2019.3)
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Requirement already satisfied: six>=1.10 in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (from matplotlib->wordcloud) (1.12.0)
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# Linux系统默认字体文件路径
# !ls /usr/share/fonts/
# 查看系统可用的ttf格式中文字体
!fc-list :lang=zh | grep ".ttf"
/home/aistudio/.fonts/simhei.ttf: SimHei,黑体:style=Regular,Normal,obyčejné,Standard,Κανονικά,Normaali,Normál,Normale,Standaard,Normalny,Обычный,Normálne,Navadno,Arrunta
# !wget https://mydueros.cdn.bcebos.com/font/simhei.ttf # 下载中文字体
# #创建字体目录fonts
!mkdir .fonts
# # 复制字体文件到该路径
!cp simhei.ttf .fonts/
mkdir: cannot create directory ‘.fonts’: File exists
#安装模型
!hub install porn_detection_lstm==1.1.0
!pip install --upgrade paddlehub
/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/sklearn/externals/joblib/externals/cloudpickle/cloudpickle.py:47: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
  import imp
Module porn_detection_lstm-1.1.0 already installed in /home/aistudio/.paddlehub/modules/porn_detection_lstm
Looking in indexes: https://pypi.mirrors.ustc.edu.cn/simple/
Requirement already up-to-date: paddlehub in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (1.6.1)
Requirement already satisfied, skipping upgrade: gunicorn>=19.10.0; sys_platform != "win32" in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (from paddlehub) (20.0.4)
Requirement already satisfied, skipping upgrade: flake8 in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (from paddlehub) (3.7.9)
Requirement already satisfied, skipping upgrade: numpy; python_version >= "3" in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (from paddlehub) (1.16.4)
Requirement already satisfied, skipping upgrade: cma==2.7.0 in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (from paddlehub) (2.7.0)
Requirement already satisfied, skipping upgrade: colorlog in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (from paddlehub) (4.1.0)
Requirement already satisfied, skipping upgrade: flask>=1.1.0 in /opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages (from paddlehub) (1.1.1)
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from __future__ import print_function
import requests
import json
import re #正则匹配
import time #时间处理模块
import jieba #中文分词
import numpy as np
import matplotlib
import matplotlib.pyplot as plt
import matplotlib.font_manager as font_manager
from PIL import Image
from wordcloud import WordCloud  #绘制词云模块
import paddlehub as hub
#请求爱奇艺评论接口,返回response信息
def getMoveinfo(url):
    '''
    请求爱奇艺评论接口,返回response信息
    参数  url: 评论的url
    :return: response信息
    '''
    session = requests.Session()
    headers = {
        "User-Agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/604.1.38 (KHTML, like Gecko) Version/11.0 Mobile/15A372 Safari/604.1",
        "Accept": "application/json",
        "Referer": "http://m.iqiyi.com/v_19rqriflzg.html",
        "Origin": "http://m.iqiyi.com",
        "Host": "sns-comment.iqiyi.com",
        "Connection": "keep-alive",
        "Accept-Language": "en-US,en;q=0.9,zh-CN;q=0.8,zh;q=0.7,zh-TW;q=0.6",
        "Accept-Encoding": "gzip, deflate"
    }
    response = session.get(url, headers=headers)
    if response.status_code == 200:
        return response.text
    return None

#解析json数据,获取评论
    '''
    解析json数据,获取评论
    参数  lastId:最后一条评论ID  arr:存放文本的list
    :return: 新的lastId
    '''
def saveMovieInfoToFile(lastId, arr):
    url='https://sns-comment.iqiyi.com/v3/comment/get_comments.action?agent_type=118&agent_version=9.11.5&authcookie=null&business_type=17&content_id=15068699100&page=&page_size=10&types=time&last_id='
    url+=str(lastId)
    responseTxt = getMoveinfo(url)
    responseJson=json.loads(responseTxt)
    comments=responseJson['data']['comments']
    for val in comments:
        # print(val.keys())
        if 'content' in val.keys():
            print(val['content'])
            arr.append(val['content'])
        lastId = str(val['id'])
    return lastId
#去除文本中特殊字符

def clear_special_char(content):
    '''
    正则处理特殊字符
    参数 content:原文本
    return: 清除后的文本
    '''
    comp = re.compile('[^A-Z^a-z^0-9^\u4e00-\u9fa5]')
    return comp.sub('', content)

# text_zh = '$你好!我是个程%序^猿,标注!!#码农¥'
# print(clear_special_char(text_zh))
def fenci(text):
    '''
    利用jieba进行分词
    参数 text:需要分词的句子或文本
    return:分词结果
    '''
    # 添加自定义字典 add_words.txt
    # jieba.load_userdict('') 
    seg=jieba.lcut(text)
    return seg
def stopwordslist(file_path):
    '''
    创建停用词表
    参数 file_path:停用词文本路径
    return:停用词list
    '''
    # f= open(file_path, 'r') 
    # my_data = [i.strip('\n') for i in f]

    stopwords= [line.strip() for line in open(file_path,encoding='UTF-8').readline()]
    return stopwords

# file_path=r'/home/aistudio/stopwords/中文停用词表.txt'
# list=stopwordslist(file_path)
# print(list)
def movestopwords(sentence, stopwords, counts):
    '''
    去除停用词,统计词频
    参数 file_path:停用词文本路径 stopwords:停用词list counts: 词频统计结果
    return:None
    '''
    # out=[]
    for word in sentence:
        if word not in stopwords:
            if len(word) !=1:
                counts[word]=counts.get(word,0)+1
    return None

    
def drawcounts(counts, num):
    '''
    绘制词频统计表
    参数 counts: 词频统计结果 num:绘制topN
    return:none
    '''
    x_aixs=[]
    y_aixs=[]
    c_order=sorted(counts.items(), key=lambda x:x[1],reverse=True)
    for c in c_order[:num]:
        x_aixs.append(c[0])
        y_aixs.append(c[1])
    
    matplotlib.rcParams['font.sans-serif']=['SimHei']
    matplotlib.rcParams['axes.unicode_minus']=False
    plt.bar(x_aixs, y_aixs)
    plt.title('词频统计结果')
    plt.show()
def drawcloud(word_f):
    '''
    根据词频绘制词云图
    参数 word_f:统计出的词频结果
    return:none
    '''    
    cloud_mask=np.array(Image.open('cloud.jpg'))
    st=set(['东西', '这是'])
    wc=WordCloud(background_color='white',
    mask=cloud_mask,
    max_words=150,
    font_path='simhei.ttf',
    min_font_size=10,
    max_font_size=100,
    width=400,
    relative_scaling=0.3,
    stopwords=st)
    wc.fit_words(word_f)
    wc.to_file('pic.png')
def text_detection(text, file_path):
    '''
    使用hub对评论进行内容分析
    return:分析结果

    '''
    porn_detection_lstm=hub.Module(name='porn_detection_lstm')
    f=open('aqy.txt', 'r', encoding='utf-8')
    for line in f:
        if len(line.strip())==1:
            continue
        else:
            test_text.append(line)
    f.close()

    input_dict={'text':test_text}
    results=porn_detection_lstm.detection(data=input_dict,use_gpu=True,batch_size=1)
    for index, item in enumerate(results):
        if item['porn_detection_key'] =='porn':
            print(item['text'],':', item['porn_probs'])
#评论是多分页的,得多次请求爱奇艺的评论接口才能获取多页评论,有些评论含有表情、特殊字符之类的
#num 是页数,一页10条评论,假如爬取1000条评论,设置num=100
## 转换数据
if __name__ == '__main__':
    num=110
    lastId='0'
    arr=[]
    with open('aqy.txt', 'a', encoding='utf-8') as f:
        for i in range(num):
            lastId=saveMovieInfoToFile(lastId, arr)
            time.sleep(0.5)
        for item in arr:
            item=clear_special_char(item)
            if item.strip()!='':
                try:
                    f.write(item+'\n')
                except  e:
                    print('含有特殊字符')
    print("共获取评论:", len(arr))
    f=open('aqy.txt', 'r', encoding='utf-8')
    counts={}
    for line in f:
        words=fenci(line)
        stopwords=stopwordslist(r'./stopwords/中文停用词表.txt')
        movestopwords(words, stopwords, counts)
    drawcounts(counts, 10)
    drawcloud(counts)
    f.close()

    file_path='aqy.txt'
    test_text=[]
    text_detection(test_text, file_path)
孔雪儿有点像张嘉倪,又有像唐嫣
虞书欣真的是太顽皮了,竟然能说出谁比她丑就坐在旁边,毫不疑问肯定是坐在赵小棠旁边了,真的给我们快乐啊。
青春有你2乃万
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