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爬取html页面，有时需要设置参数post方式请求，生成json，保存文件中。
1）引入模块
import requests from bs4 import BeautifulSoup
url_ = ‘http://www.c.....................‘
2）设置参数
datas = { ‘yyyy‘:‘2014‘, ‘mm‘:‘-12-31‘, ‘cwzb‘:"incomestatements", ‘button2‘:"%CC%E1%BD%BB", }
3）post请求
r = requests.post(url,data = datas)
4）设置编码
r.encoding = r.apparent_encoding
5）BeautifulSoup解析request请求
soup = BeautifulSoup(r.text)
6）find_all筛选
soup.find_all(‘strong‘,text=re.compile(u"股票代码"))[0].parent.contents[1]
7）css选择select
soup.select("option[selected]")[0].contents[0]
beautifulsoap的API请查看 https://www.crummy.com/software/BeautifulSoup/bs4/doc/index.zh.html#beautifulsoup
Demo：文件读url，设置参数，post方式，beautifulsoap解析，生成json，保存文件中
import requests from bs4 import BeautifulSoup import re import json import time fd = open(r"E:\aa.txt","r") mylist = [] for line in fd: mylist.append(line) url_pre = ‘http://www.c.....................‘ code = open(r"E:\a---.txt", "a") for index in xrange(0,len(mylist)): print index url_id = mylist[index].split(‘?‘)[-1] url_id = url_id[-7:-1] datas = { ‘yyyy‘:‘2014‘, ‘mm‘:‘-12-31‘, ‘cwzb‘:"incomestatements",‘button2‘:"%CC%E1%BD%BB", } url = url_pre + str(url_id) print url print datas r = requests.post(url,data = datas) r.encoding = r.apparent_encoding print r soup = BeautifulSoup(r.text) r.encoding = r.apparent_encoding soup = BeautifulSoup(r.text) if len(soup.find_all("td",text=re.compile(u"营业收入"))) == 0: continue jsonMap = {} jsonMap[u‘股票代码‘] = soup.find_all(‘strong‘,text=re.compile(u"股票代码"))[0].parent.contents[1] jsonMap[u‘股票简称‘] = soup.find_all(‘strong‘,text=re.compile(u"股票代码"))[0].parent.contents[3] jsonMap[u‘年度‘] = soup.select("option[selected]")[0].contents[0] jsonMap[u‘报告期‘] = soup.select("option[selected]")[1].contents[0] yysr = soup.find_all("td",text=re.compile(u"营业收入"))[0].parent yysrsoup = BeautifulSoup(str(yysr)) jsonMap[u‘营业收入‘] = yysrsoup.find_all(‘td‘)[1].contents[0] yylr = soup.find_all("td",text=re.compile(u"营业利润"))[0].parent yylrsoup = BeautifulSoup(str(yylr)) jsonMap[u‘营业利润‘] = yylrsoup.find_all(‘td‘)[3].contents[0] strJson = json.dumps(jsonMap, ensure_ascii=False) print strJson #code.write(strJson) code.write(strJson.encode(‘utf-8‘) + ‘\n‘) time.sleep(0.1) code.flush()
爬虫2：html页面+beautifulsoap模块+post方式+demo
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原文地址：http://www.cnblogs.com/rongyux/p/5513758.html
