标签:rev 签名 pil lis att objectid 序列 app接口 testing
解析库之bs4的基本使用方法
‘‘‘ pip install beautifulsoup4#安装bs4 pip install lxml#安装lxml ‘‘‘ html_doc = """ <html><head><title>The Dormouse‘s story</title></head> <body> <p class="sister"><b>$37</b></p> <p class="story" id="p">Once upon a time there were three little sisters; and their names were <a href="http://example.com/elsie" class="sister" >Elsie</a>, <a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and <a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>; and they lived at the bottom of a well.</p> <p class="story">...</p> """ from bs4 import BeautifulSoup#从bs4中导入BeautifulSoup #调用BeautifulSoup实例化一个soup对象 #参数一:解析文本 #参数二:解析器(html.parser,lxml,....) soup=BeautifulSoup(html_doc,‘lxml‘) print(soup) print(‘*‘*100) print(type(soup)) #对其美化 html=soup.prettify() print(html)
bs4之遍历文档树
html_doc = """ <html><head><title>The Dormouse‘s story</title></head><body><p class="sister"><b>$37</b></p><p class="story" id="p">Once upon a time there were three little sisters; and their names were<a href="http://example.com/elsie" class="sister" >Elsie</a>,<a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and<a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>;and they lived at the bottom of a well.</p><p class="story">...</p> """ from bs4 import BeautifulSoup#从bs4中导入BeautifulSoup soup=BeautifulSoup(html_doc,‘lxml‘) ‘‘‘ 遍历文档树: 1、直接使用 2、获取标签的名称 3、获取标签的属性 4、获取标签的内容 5、嵌套选择 6、子节点,子孙节点 7、父节点、祖先节点 8、兄弟节点 ‘‘‘ #1、直接使用 print(soup.p)#查找第一个p标签 print(soup.a)#查找第一个a标签 # 2、获取标签的名称 print(soup.head.name)#获取head标签的名称 #3、获取标签的属性 print(soup.a.attrs)#获取a标签中所有属性 print(soup.a.attrs[‘href‘])#获取a标签中href属性 #4、获取标签的内容 print(soup.p.text) #$37 #5、嵌套选择 print(soup.html.head) #<head><title>The Dormouse‘s story</title></head> #6、子节点,子孙节点 print(soup.body.children)#body所以子节点返回迭代器对象 <list_iterator object at 0x02C72650> print(list(soup.body.children))#强转换为list对象 print(soup.body.descendants)#子孙节点 生成器具对象 print(list(soup.body.descendants))#子孙节点 #7、父节点、祖先节点 print(soup.p.parent)#找p标签的父节点 为body print(soup.p.parents)#获取p标签的祖先节点 print(list(soup.p.parents))#获取p标签的祖先节点 #8、兄弟节点 #找到下一个兄弟 print(soup.p.next_sibling) #找下面所有的兄弟 print(soup.p.next_siblings) #返回生成器 print(list(soup.p.next_siblings)) #找上一个兄弟 print(soup.a.previous_sibling)#找a上一个兄弟节点 print(soup.a.previous_siblings)#返回生成器 print(list(soup.a.previous_siblings))
bs4搜索文档库的应用
html_doc = """ <html><head><title>The Dormouse‘s story</title></head> <body> <p class="sister"><b>$37</b></p> <p class="story" id="p">Once upon a time there were three little sisters; and their names were <a href="http://example.com/elsie" class="sister" >Elsie</a>, <a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and <a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>; and they lived at the bottom of a well.</p> <p class="story">...</p> """ from bs4 import BeautifulSoup soup=BeautifulSoup(html_doc,‘lxml‘) #字符串过滤器 #name p_tag=soup.find(name=‘p‘) print(p_tag)#根据文本p查找某个标签 tag_s1 = soup.find_all(name=‘p‘)#查找所有标签名为p的节点 #attrs #查找第一个class为sister的节点 p=soup.find(attrs={‘class‘:‘sister‘}) print(p) #查找所有class为sister的节点 p=soup.find_all(attrs={‘class‘:‘sister‘}) print(p) #text text=soup.find(text=‘$37‘) print(text) #配合使用 #找到一个id为link2的以及文本为Lacie的a标签 a=soup.find(name=‘a‘,attrs={"id":"link2"},text=‘Lacie‘) print(a)
用python爬取豌豆荚数据
‘‘‘ 下载地址: https://www.wandoujia.com/wdjweb/api/category/more?catId=6001&subCatId=0&page=3&ctoken=lAd3GvU1DbFpJzYVdADWw9pS https://www.wandoujia.com/wdjweb/api/category/more?catId=6001&subCatId=0&page=4&ctoken=lAd3GvU1DbFpJzYVdADWw9pS ‘‘‘ from bs4 import BeautifulSoup import re import requests def get_page(url): response=requests.get(url) return response #app名称 #2、开始解析 #解析详情页 def parse_detail(text): soup=BeautifulSoup(text,‘lxml‘) #app名称 name=soup.find(name=‘span‘,attrs={"class":"title"}).text print(name) #好评率 love=soup.find(name=‘span‘,attrs={"class":"love"}).text print(love) #评论数 commit_num=soup.find(name=‘a‘,attrs={"class":"comment-open"}).text print(commit_num) #小编点评 commit_content = soup.find(name=‘div‘, attrs={"class": "con"}).text print(commit_content) #app下载链接 download_url = soup.find(name=‘a‘, attrs={"class": "normal-dl-btn"}).attrs[‘href‘] print(download_url) #解析主页 def parse_index(data): soup = BeautifulSoup(data, ‘lxml‘) ‘‘‘ 图标地址 <li data-pn="com.casual.game.jump" class="card" data-suffix=""><div class="icon-wrap"><a href="https://www.wandoujia.com/apps/com.casual.game.jump"> <img src="https://android-artworks.25pp.com/fs08/2018/07/11/9/109_2154e564e7823981ae2cde0102547db1_con_130x130.png" data-original="https://android-artworks.25pp.com/fs08/2018/07/11/9/109_2154e564e7823981ae2cde0102547db1_con_130x130.png" alt="Jump Jump Go" class="icon lazy" width="68" height="68" style=""> </a></div><div class="app-desc"><h2 class="app-title-h2"><a href="https://www.wandoujia.com/apps/com.casual.game.jump" title="Jump Jump Go" class="name">Jump Jump Go</a></h2><div class="meta"> <a rel="nofollow" class="tag gooddev" href="https://www.wandoujia.com/manual_testing?from=www" target="_blank" title="编辑亲测基本可用,无明显恶意行为。"></a> <span class="install-count">6540人安装</span> <span class="dot">?</span> <span title="5.22MB">5.22MB</span></div><div class="comment"> Jump Jump (跳一跳) was the most popular puzzle game i </div></div> <a class="tag-link" href="https://www.wandoujia.com/category/6001?pos=w/cardtag/gamecategory_com.casual.game.jump">休闲益智</a> <a data-app-id="7837882" data-app-vid="300445168" data-app-name="Jump Jump Go" data-app-pname="com.casual.game.jump" data-app-vcode="8" data-app-vname="1.08" data-app-categoryid="6001" data-app-subcategoryid="" data-app-icon="https://android-artworks.25pp.com/fs08/2018/07/11/9/109_2154e564e7823981ae2cde0102547db1_con_130x130.png" data-app-rtype="1" data-app-requireid="1" class="detail-check-btn" href="https://www.wandoujia.com/apps/com.casual.game.jump">查看 </a> </li> ‘‘‘ app_list=soup.find_all(name=‘li‘,attrs={"class":"card"}) for app in app_list: #print("tank"*1000) print(app) #图标地址 #获取第一个标签中的data-original属性 img=app.find(name=‘img‘).attrs[‘data-original‘] print(img) #下载次数 #获取class为install-count的span标签中的文本 down_num=app.find(name=‘span‘,attrs={"class":"install-count"}).text print(down_num) #大小 #根据文本正则获取到文本中包含 数字加MB(\d代表数字)的span标签中的文本 size=soup.find(name=‘span‘,text=re.compile("\d+MB")).text print(size) #详情页地址 #直接获取第一个a标签并提取href值 detail_url=app.find(name=‘a‘).attrs[‘href‘] print(detail_url) # 3往app详情页发送请求 response = get_page(detail_url) #4解析app详情页 parse_detail(response.text) def main(): for line in range(1,33): #1、往app接口发送请求 url=f‘https://www.wandoujia.com/wdjweb/api/category/more?catId=6001&subCatId=0&page={line}&ctoken=lAd3GvU1DbFpJzYVdADWw9pS‘ response=get_page(url) #print(response.text) print("*"*1000) #反序列化为字典 data=response.json()#json必须是双引号 #获取App接口书局 app_li=data[‘data‘][‘content‘] print(app_li) #解析app标签数据 parse_index(app_li) if __name__ == ‘__main__‘:
pymongo的简单使用
from pymongo import MongoClient #1连接mongoDB客户端 #参数1:mongoDB的ip地址 #参数2:mongoDB的端口号 默认:27017 client=MongoClient(‘localhost‘,27017) print(client) #2、进入zmm_db库,没有则创建 print(client[‘zmm_db‘]) #3、创建集合 client[‘zmm_db‘][‘people‘] #4、给zmm_db库插入数据 #1、插入一条 data1={ ‘name‘:‘zmm‘, ‘age‘:‘20‘, ‘sex‘:‘female‘ } client[‘zmm_db‘][‘people‘].insert(data1) #2、插入多条 data1={ ‘name‘:‘zmm‘, ‘age‘:‘20‘, ‘sex‘:‘female‘ } data2={ ‘name‘:‘lyj‘, ‘age‘:‘30‘, ‘sex‘:‘female‘ } data3={ ‘name‘:‘zcj‘, ‘age‘:‘21‘, ‘sex‘:‘female‘ } client[‘zmm_db‘][‘people‘].insert([data1,data2,data3]) #5、查数据 data_s=client[‘zmm_db‘][‘people‘].find() for data in data_s: print(data) #差看一条数据 print(client[‘zmm_db‘][‘people‘].find_one()) #官方推荐使用 #插入一条inser_one client[‘zmm_db‘][‘people‘].insert_one() #插入多条inser_many client[‘zmm_db‘][‘people‘].insert_many()
有关命令的作用
1、BeautifulSoup解析库 2、MongoDB存储库 3、requests-html 请求库 BeautifulSoup 1、什么是bs4? 是一个基于re开发的解析库,可以提供一些强大的及解析功能. 提高提取数据的效率与爬虫开发效率 2、安装与使用 pip install beaytifulsoup4 MongoDB 1、下载安装 2、在C盘创建一个data/db文件夹 -数据的存放路径 3、输入mongod启动服务 进入终端cmd(以管理员身份),输入mongod启动MongoDB服务 4、mongo进入MongoDB客户端 打开一个新的终端cmd(以管理员身份),输入mongo进入客户端 二 数据库操作: 切换库: SQL: use admin;有则切换,无则报错 MongoDB use zmm;有则切换,无则创建,并切换到zmm库中 查数据库 SQL: show databases; MongoDB: show dbs;显示的数据库若无数据则不显示 删除库: SQL: drop database; MongoDB: db.dropDatabase() 集合操作:MySQL中叫做表 SQL: create table f1,f2..... MongoDB: #在当前库中通过点来创建集合 db.student 插入数据: #插入多条数据 db.student.insert([{"name1":"tank1"},{"name2":"tank2"}]) #插入一条name为zmm的数据 db.student.insert({"name":"zmm"}) #结果为WriteResult({ "nInserted" : 1 }) 查数据: #查找student集合中所有数据 db.student.find({}) #结果{ "_id" : ObjectId("5d0b381114466bde5bc647c5"), "name" : "zmm" } #查看结果 db.student.find({}) #结果如下 #{ "_id" : ObjectId("5d0b381114466bde5bc647c5"), "name" : "zmm" } #{ "_id" : ObjectId("5d0b393914466bde5bc647c6"), "name1" : "tank1" } #{ "_id" : ObjectId("5d0b3a0214466bde5bc647c7"), "name1" : "tank1" } #{ "_id" : ObjectId("5d0b3a0214466bde5bc647c8"), "name2" : "tank2" } #查一条 查找name为zmm的记录 #结果{ "_id" : ObjectId("5d0b381114466bde5bc647c5"), "name" : "zmm" }
通过本次学习,学习到python的更多知识,特别开心
标签:rev 签名 pil lis att objectid 序列 app接口 testing
原文地址:https://www.cnblogs.com/zmmm/p/11067379.html