在python中浏览网站,抓取并发布

stackoverflow上已有很多好的资源,但我仍然遇到问题.我访问过这些来源:

如何在python中向.aspx页面提交查询

将帖子请求提交到aspx页面

使用BeautifulSoup使用Python来删除aspx网页

http://www.pythonforbeginners.com/cheatsheet/python-mechanize-cheat-sheet

我正试图访问http://www.latax.state.la.us/Menu_ParishTaxRolls/TaxRolls.aspx并选择一个教区.我相信这会强制发布一个帖子,并允许我选择一年,再次发布,并允许更多选择.我按照上述来源以不同的方式编写了我的脚本,并且未能成功提交网站以允许我输入一年.

我目前的代码

import urllib
from bs4 import BeautifulSoup
import mechanize

headers = [
    ('Accept','text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8'),
    ('Origin', 'http://www.indiapost.gov.in'),
    ('User-Agent', 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.17 (KHTML, like Gecko)  Chrome/24.0.1312.57 Safari/537.17'),
    ('Content-Type', 'application/x-www-form-urlencoded'),
    ('Referer', 'http://www.latax.state.la.us/Menu_ParishTaxRolls/TaxRolls.aspx'),
    ('Accept-Encoding', 'gzip,deflate,sdch'),
    ('Accept-Language', 'en-US,en;q=0.8'),
]

br = mechanize.Browser()
br.addheaders = headers

url = 'http://www.latax.state.la.us/Menu_ParishTaxRolls/TaxRolls.aspx'

response = br.open(url)
# first HTTP request without form data
soup = BeautifulSoup(response)
# parse and retrieve two vital form values
viewstate = soup.findAll("input", {"type": "hidden", "name": "__VIEWSTATE"})
eventvalidation = soup.findAll("input", {"type": "hidden", "name": "__EVENTVALIDATION"})

formData = (
    ('__EVENTVALIDATION', eventvalidation[0]['value']),
    ('__VIEWSTATE', viewstate[0]['value']),
    ('__VIEWSTATEENCRYPTED',''),

)



try:
    fout = open('C:\\GIS\\tmp.htm', 'w')
except:
    print('Could not open output file\n')

fout.writelines(response.readlines())
fout.close()

我也尝试过这个shell,我输入的内容加上我收到的内容(修改为减少批量)可以找到http://pastebin.com/KAW5VtXp

无论如何,我尝试更改Parish下拉列表中的值并发布我将被带到网站管理员登录页面.

我接近这个正确的方法吗？任何想法都会非常有帮助.

谢谢!