请教个 Requests 的问题

我想用Requests模拟登陆http://bbs.weiphone.com

我看了下登陆要用的cookie是xIka_2132_saltkey和xIka_2132_auth

但是我post后得到的response.cookies里面没有这两个cookie，有人能告诉我漏了什么吗？

login_url = 'http://passport.weiphone.com/?r=user/loginProcess'
user = 'xxxx'
password = 'xxxx'
user_info = {'Kaf_Model_Form_Login[login]': user,
'Kaf_Model_Form_Login[password]': password,
'Kaf_Model_Form_Login[remember]': 0 }
login = requests.post(login_url, data=user_info)
for cookie in login.cookies:
print (cookie.name, cookie.value)

output: ('PHPSESSID', 'vc6v382ibq656ftmj4ej0jef26')