投给猫饼的票，哈哈。一个acfun登陆+投票的代码

import requests


def vote(cookies):
    """投票"""
    headers = {
        'Accept': 'application/json, text/plain, */*',
        'Accept-Encoding': 'gzip, deflate',
        'Accept-Language': 'zh-CN,zh;q=0.9',
        'Connection': 'keep-alive',
        'Content-Length': '44',
        'Content-Type': 'application/json;charset=UTF-8',
        'Host': 'activity.acfun.cn',
        'Origin': 'http://activity.acfun.cn',
        'Referer': 'http://activity.acfun.cn/m/acflower/detail/7443?shareId=745',
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.62 Safari/537.36'
    }
    url = 'http://activity.acfun.cn/api/vote/ballot'
    payload = {
        # 不确定哪一个元素是猫饼的
        'itemId': '7443',
        'voteGroupId': "",
        'voteId': '70'
    }
    res = requests.post(url, headers=headers, json=payload, cookies=cookies)
    print(res.json())


def login(username, password):
    """登录"""
    url = 'https://id.app.acfun.cn/rest/web/login/signin'
    headers = {
        'Accept': '*/*',
        'Accept-Encoding': 'gzip, deflate, br',
        'Accept-Language': 'zh-CN,zh;q=0.9',
        'Connection': 'keep-alive',
        'Content-Length': '51',
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
        'Host': 'id.app.acfun.cn', 'Origin': 'http://www.acfun.cn', 'Referer': 'http://www.acfun.cn/login/?returnUrl=http%3A%2F%2Fwww.acfun.cn%2F',
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.62 Safari/537.36'
    }
    data = {
        'username': username,
        'password': password,
        'key': '',
        'captcha': ''
    }
    res = requests.post(url, headers=headers, data=data)
    if res.status_code == 200:
        cookies = res.cookies.get_dict()
        print(cookies)
        return cookies
    else:
        print('登录失败')


if __name__ == '__main__':
    cookie = login('username', 'password')
    vote(cookie)