Selenium click button invalidation

Please give us some advice. The submit information of Douban is shown in the figure

. The

code is as follows:
click, ENTER, RETURN, SPACE are all useless


from selenium import webdriver  -sharp selenium
from selenium.webdriver.common.keys import Keys


def loginZhihu():
    loginurl = "https://accounts.douban.com/login"  -sharp 
    -sharp webdriver
    driver = webdriver.Chrome("C:\Program Files (x86)\Google\Chrome\Application\chromedriver.exe")
    driver.get(loginurl)  -sharp 
    driver.find_element_by_name("form_email").clear()  -sharp 
    driver.find_element_by_name("form_email").send_keys(u"5467878878")  -sharp 
    driver.find_element_by_name("form_password").clear()  -sharp 
    driver.find_element_by_name("form_password").send_keys(u"454354543543")  -sharp 

    captcha = driver.find_element_by_id("captcha_image")  -sharp 
    submit = driver.find_element_by_css_selector("input[class="bn-submit"]")  -sharp 
    -sharp 
    if captcha:
        captcha_field = driver.find_element_by_id("captcha_field")  -sharp 
        text = input(":")  -sharp 
        captcha_field.send_keys(text)  -sharp selenium
        submit.send_keys(Keys.RETURN)  -sharp 
    else:
        submit.send_keys(Keys.RETURN)  -sharp 
    cookies = driver.get_cookies()  -sharp 
    driver.get("https://movie.douban.com/")  -sharp 
    return cookies  -sharp cookies 
loginZhihu()