Python：请求无法登录网站

我需要抓取需要登录的网站。我正在尝试创建一个session并登录，因为登录后我必须抓取不同的页面。但无法找出它不起作用的原因。

import requests
from bs4 import BeautifulSoup

login_data = {
           "log":"login",
           "login":"my email",
           "password":"my password"
}

session = requests.session()
session.post(login_url, data=login_data)
response = session.get(url)
html = response.text
soup = BeautifulSoup(html, "html.parser")
print(soup.title.get_text())

标题显示它不起作用。

这是网站表格。

<form method="post" id="signin-form" class="form-horizontal">
    <input type="hidden" name="referer" value="" />
    <div class="form-group">
        <label for="email_text" class="col-sm-4 control-label">Your login (email):</label>
        <div class="col-sm-8">
            <input type="email" class="form-control" id="email_text" value="" name="login" autofocus data-validation='{"parent":".form-group","events":["keyup","blur"],"rules":[{"name":"notblank"},{"name":"email"}]}' />
        </div>
    </div>
    <div class="form-group">
        <label for="password_text" class="col-sm-4 control-label">Password:</label>
        <div class="col-sm-8">
            <input type="password" class="form-control" id="password_text" name="password" data-validation='{"parent":".form-group","rules":[{"name":"min","min":5}]}' />
        </div>
    </div>
    <div class="form-group">
        <div class="col-sm-8 col-sm-offset-4">
            <div class="checkbox">
                <label>
                    <input type="checkbox" name="rememberme"> Remember me on this computer
                </label>
            </div>
        </div>
    </div>
    <div class="form-group">
        <div class="col-sm-offset-4 col-sm-8">
            <button type="submit" class="btn btn-default btn-lg" name="log">Log into your account</button>
            <a class="btn btn-default btn-lg mobile-show-inline-block" href="/account/create/">Create account</a>
            <a href="/account/lostpassword" class="btn btn-link btn-lg">Forgot your password?</a>
        </div>
    </div>
</form>

N.B：不建议我使用selenium。我可以这样做selenium我测试过但我必须坚持requests因为selenium即使我使用也会弹出控制台PhantomJS.

首先尝试在登录页面上进行获取。也许它正在设置一些它希望出现在帖子中的cookie。