Question

driver.find_element_by_id('username').send_keys('945412')
print 'username entered'
driver.find_element_by_name('password').send_keys('mns347')
print 'password entered'
driver.find_element_by_name("submit").click()
print 'submit'

但是它抛出错误

Traceback (most recent call last):
  File "C:\Users\SS\Desktop\python-mp\sele_sample.py", line 17, in <module>
    driver.find_element_by_id('username').send_keys('945412')
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 360, in find_element_by_id
    return self.find_element(by=By.ID, value=id_)
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 978, in find_element
    'value': value})['value']
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
NoSuchElementException: Message: no such element: Unable to locate element: {"method":"id","selector":"username"}
  (Session info: chrome=70.0.3538.102)
  (Driver info: chromedriver=2.44.609538 (b655c5a60b0b544917107a59d4153d4bf78e1b90),platform=Windows NT 6.3.9600 x86_64)

Answer 1

您可以添加显式等待来等待元素被加载。

username= WebDriverWait(driver, 2).until(
EC.presence_of_element_located((By.ID, "username"))
 )
username.send_keys('945412')

Answer 2

您需要安装chromedriver和chrome。您可以根据需要为其他浏览器更改这些设置。这对我来说很好。

    <div class="parent">
        <div class="child1"></div>
        <div class="child2"></div>
    </div>
    <style>
    .child1{
        background-image:url(https://picsum.photos/200/300/?random);
        width:300px;
        height:300px;
    }
    .child2{ 
        background-color: rgba(138, 43, 226, 0.6);
        width:300px;
        height:300px;
        position: absolute;
        top: 0px;
    }
    .parent {
        position: relative;
        height: 2000px;
    }
    </style>

Answer 3

我看不到您的代码有任何错误。但是根据您的错误消息，没有ID用户名的字段。

请确保您的网站上确实存在一个带有ID用户名的字段。

例如，githubs用户名字段定义如下

<input name="login" id="login_field" class="form-control input-block" tabindex="1" autocapitalize="off" autocorrect="off" autofocus="autofocus" type="text">

在这种情况下，您将不得不对此进行调整。看起来像这样

driver.find_element_by_id('login_field').send_keys('945412')

因为该字段包含id =“ login_field”

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4 个答案: