已经安装beautifulsoup并且用cmd整合到python根目录
源码:import urllib.request, urllib.error# 制定URL,获取网页数据
import xlwt# 进行excel操作
#import sqlite3# 进行SQLite数据库操作
findLink = re.compile(r'<a href="(.*?)">')# 创建正则表达式对象,标售规则 影片详情链接的规则
findImgSrc = re.compile(r'<img.*src="(.*?)"', re.S)
findTitle = re.compile(r'<span class="title">(.*)</span>')
findRating = re.compile(r'<span class="rating_num" property="v:average">(.*)</span>')
findJudge = re.compile(r'<span>(\d*)人评价</span>')
findInq = re.compile(r'<span class="inq">(.*)</span>')
findBd = re.compile(r'<p class="">(.*?)</p>', re.S)
def main():
baseurl = "https://movie.douban.com/top250?start="#要爬取的网页链接
# 1.爬取网页
datalist = getData(baseurl)
savepath = "豆瓣电影Top250.xls" #当前目录新建XLS,存储进去
# dbpath = "movie.db" #当前目录新建数据库,存储进去
# 3.保存数据
saveData(datalist,savepath) #2种存储方式可以只选择一种
# saveData2DB(datalist,dbpath)
# 爬取网页
def getData(baseurl):
datalist = []#用来存储爬取的网页信息
for i in range(0, 10):# 调用获取页面信息的函数,10次
url = baseurl + str(i * 25)
html = askURL(url)# 保存获取到的网页源码
# 2.逐一解析数据
soup = BeautifulSoup(html, "html.parser")
for item in soup.find_all('div', class_="item"):# 查找符合要求的字符串
data = []# 保存一部电影所有信息
item = str(item)
link = re.findall(findLink, item)# 通过正则表达式查找
data.append(link)
imgSrc = re.findall(findImgSrc, item)
data.append(imgSrc)
titles = re.findall(findTitle, item)
if (len(titles) == 2):
ctitle = titles
data.append(ctitle)
otitle = titles.replace("/", "")#消除转义字符
data.append(otitle)
else:
data.append(titles)
data.append(' ')
rating = re.findall(findRating, item)
data.append(rating)
judgeNum = re.findall(findJudge, item)
data.append(judgeNum)
inq = re.findall(findInq, item)
if len(inq) != 0:
inq = inq.replace("。", "")
data.append(inq)
else:
data.append(" ")
bd = re.findall(findBd, item)
bd = re.sub('<br(\s+)?/>(\s+)?', "", bd)
bd = re.sub('/', "", bd)
data.append(bd.strip())
datalist.append(data)
return datalist
# 得到指定一个URL的网页内容
def askURL(url):
head = {# 模拟浏览器头部信息,向豆瓣服务器发送消息
"User-Agent": "Mozilla / 5.0(Windows NT 10.0; Win64; x64) AppleWebKit / 537.36(KHTML, like Gecko) Chrome / 80.0.3987.122Safari / 537.36"
}
# 用户代理,表示告诉豆瓣服务器,我们是什么类型的机器、浏览器(本质上是告诉浏览器,我们可以接收什么水平的文件内容)
request = urllib.request.Request(url, headers=head)
html = ""
try:
response = urllib.request.urlopen(request)
html = response.read().decode("utf-8")
except urllib.error.URLError as e:
if hasattr(e, "code"):
print(e.code)
if hasattr(e, "reason"):
print(e.reason)
return html
# 保存数据到表格
def saveData(datalist,savepath):
print("save.......")
book = xlwt.Workbook(encoding="utf-8",style_compression=0) #创建workbook对象
sheet = book.add_sheet('豆瓣电影Top250', cell_overwrite_ok=True) #创建工作表
col = ("电影详情链接","图片链接","影片中文名","影片外国名","评分","评价数","概况","相关信息")
for i in range(0,8):
sheet.write(0,i,col)#列名
for i in range(0,250):
# print("第%d条" %(i+1)) #输出语句,用来测试
data = datalist
for j in range(0,8):
sheet.write(i+1,j,data)#数据
book.save(savepath) #保存
# def saveData2DB(datalist,dbpath):
# init_db(dbpath)
# conn = sqlite3.connect(dbpath)
# cur = conn.cursor()
# for data in datalist:
# for index in range(len(data)):
# if index == 4 or index == 5:
# continue
# data = '"'+data+'"'
# sql = '''
# insert into movie250(
# info_link,pic_link,cname,ename,score,rated,instroduction,info)
# values (%s)'''%",".join(data)
# # print(sql) #输出查询语句,用来测试
# cur.execute(sql)
# conn.commit()
# cur.close
# conn.close()
# def init_db(dbpath):
# sql = '''
# create table movie250(
# id integerprimarykey autoincrement,
# info_link text,
# pic_link text,
# cname varchar,
# ename varchar ,
# score numeric,
# rated numeric,
# instroduction text,
# info text
# )
#
#
# '''#创建数据表
# conn = sqlite3.connect(dbpath)
# cursor = conn.cursor()
# cursor.execute(sql)
# conn.commit()
# conn.close()
# 保存数据到数据库
if __name__ == "__main__":# 当程序执行时
# 调用函数
main()
# init_db("movietest.db")
print("爬取完毕!")
问题反馈:
Traceback (most recent call last):
File "C:\新建文件夹\python\1.py", line 2, in <module>
from bs4 import BeautifulSoup# 网页解析,获取数据
File "C:\Users\18850\AppData\Local\Programs\Python\Python39\lib\site-packages\bs4\__init__.py", line 30, in <module>
from .builder import builder_registry, ParserRejectedMarkup
File "C:\Users\18850\AppData\Local\Programs\Python\Python39\lib\site-packages\bs4\builder\__init__.py", line 308, in <module>
from . import _htmlparser
File "C:\Users\18850\AppData\Local\Programs\Python\Python39\lib\site-packages\bs4\builder\_htmlparser.py", line 7, in <module>
from html.parser import (
ImportError: cannot import name 'HTMLParseError' from 'html.parser' (C:\Users\18850\AppData\Local\Programs\Python\Python39\lib\html\parser.py) from bs4 import BeautifulSoup# 网页解析,获取数据
没看到哪里有这句代码 什么叫"用cmd整合到python根目录"?你是怎么安装bs4的 hrp 发表于 2021-5-26 13:04
什么叫"用cmd整合到python根目录"?你是怎么安装bs4的
先下载,然后把beautifulsoup文件放到python根目录,再用cmd(不知道安装还是整合,小白第一次接触cmd,不好意思,见笑了),成功了,但是还是像现在这样报错。 wp231957 发表于 2021-5-26 12:35
from bs4 import BeautifulSoup# 网页解析,获取数据
没看到哪里有这句代码
# -*- codeing = utf-8 -*-
from bs4 import BeautifulSoup# 网页解析,获取数据
import re# 正则表达式,进行文字匹配
可能复制失误了,前三句在上面,原文是有的。 巨迟公 发表于 2021-5-26 14:53
先下载,然后把beautifulsoup文件放到python根目录,再用cmd(不知道安装还是整合,小白第一次接触cmd, ...
cmd输入
pip install bs4 -i https://pypi.tuna.tsinghua.edu.cn/simple
直接安装就可以了,不用手动下载,你先把原先的卸载了再重新安装试试吧
hrp 发表于 2021-5-26 15:05
cmd输入
pip install bs4 -i https://pypi.tuna.tsinghua.edu.cn/simple
直接安装就可以了,不用手动下 ...
好像没解决,反馈如下:{:10_266:}
Traceback (most recent call last):
File "C:\新建文件夹\python\爬豆瓣.py", line 2, in <module>
from bs4 import BeautifulSoup# 网页解析,获取数据
File "C:\Users\18850\AppData\Local\Programs\Python\Python39\lib\site-packages\bs4\__init__.py", line 30, in <module>
from .builder import builder_registry, ParserRejectedMarkup
File "C:\Users\18850\AppData\Local\Programs\Python\Python39\lib\site-packages\bs4\builder\__init__.py", line 308, in <module>
from . import _htmlparser
File "C:\Users\18850\AppData\Local\Programs\Python\Python39\lib\site-packages\bs4\builder\_htmlparser.py", line 7, in <module>
from html.parser import (
ImportError: cannot import name 'HTMLParseError' from 'html.parser' (C:\Users\18850\AppData\Local\Programs\Python\Python39\lib\html\parser.py) 巨迟公 发表于 2021-5-26 21:21
好像没解决,反馈如下:
Traceback (most recent call last):
lxml安装没 hrp 发表于 2021-5-26 21:28
lxml安装没
安装了
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