poststock,py

import requests
from bs4 import BeautifulSoup as bs
rs = requests.session()

payload = {
'pageTypeHidden':'1',
'code':'1101',
'ctl00$ContentPlaceHolder1$DropDownList1':'2015年6月'
}
res = rs.get('http://www.cnyes.com/twstock/directorholder/1101.htm')

#print res.text

soup = bs(res.text)
hidden = soup.select('input')
for hid in hidden:
    if hid.get('value') is not None and hid.get('value') != '':
        payload[hid.get('name')] = hid.get('value')

res2 = rs.post('http://www.cnyes.com/twstock/directorholder/1101.htm', data= payload)
soup = bs(res2.text)

table = soup.select('.tabvl')[0]
for tr in table.select('tr')[1:]:
    for td in tr.select('td'):
        print td.text,
    print