html = (
    """
    <form action="https://website.com/log.php" method="POST">
        <input name="log" type="text" value="{log}">
        <input name="pwd" type="password" value="{pwd}">
        <input name="finish" type="text" value="{finish}">
        <input type="submit">
    </form>
    """
    .format(**payload))
with open('./temp.html', 'w') as hf:
    hf.write(html)
sess = dryscrape.Session(base_url='./')
q = sess.visit('/temp.html')
q.form().submit()
Соскребите HTML с веб-страницы после рендеринга JSON/Javascript без Selenium, поддерживая POSTing