Question

打开main（home）页面，然后使用click（）函数进入登录页面，现在我想在这个页面中找到元素我怎么能？

这是我的代码......

import unittest,time,re
from selenium import webdriver
from selenium import selenium
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support import expected_conditions as EC

class PythonOrgSearch(unittest.TestCase):

    def setUp(self):
        #self.selenium = selenium("localhost", 4444, "*firefox","http://www.google.com/")
        self.driver = webdriver.Firefox()

    def test_search_in_python_org(self):
        driver = self.driver
        driver.get("https://bitbucket.org/")
        elem = driver.find_element_by_id("user-options")
        elem = elem.find_element_by_class_name("login-link")
        elem.click()
        print "check"

        #elem = WebDriverWait(driver, 30).until(EC.elementToBeVisible(By.name("username")));
        #elem.send_keys("my_username@bitbucket.org")

        user_name_field = driver.find_element_by_id('id_username')
        password_field = driver.find_element_by_id('id_password')

        user_name_field.send_keys('your_user_name')
        password_field.send_keys('your_password')

    def tearDown(self):
        pass
        #self.driver.close()

if __name__ == "__main__":
    unittest.main()

我收到此错误（文件名python_org_search.py）

E
======================================================================
ERROR: test_search_in_python_org (__main__.PythonOrgSearch)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "python_org_search.py", line 25, in test_search_in_python_org
    user_name_field = driver.find_element_by_id('id_username')
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 197, in find_element_by_id
    return self.find_element(by=By.ID, value=id_)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 681, in find_element
    {'using': by, 'value': value})['value']
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 164, in execute
    self.error_handler.check_response(response)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/errorhandler.py", line 164, in check_response
    raise exception_class(message, screen, stacktrace)
NoSuchElementException: Message: u'Unable to locate element: {"method":"id","selector":"id_username"}' ; Stacktrace: 
    at FirefoxDriver.prototype.findElementInternal_ (file:///tmp/tmpKo1TXx/extensions/fxdriver@googlecode.com/components/driver_component.js:8860)
    at FirefoxDriver.prototype.findElement (file:///tmp/tmpKo1TXx/extensions/fxdriver@googlecode.com/components/driver_component.js:8869)
    at DelayedCommand.prototype.executeInternal_/h (file:///tmp/tmpKo1TXx/extensions/fxdriver@googlecode.com/components/command_processor.js:10831)
    at DelayedCommand.prototype.executeInternal_ (file:///tmp/tmpKo1TXx/extensions/fxdriver@googlecode.com/components/command_processor.js:10836)
    at DelayedCommand.prototype.execute/< (file:///tmp/tmpKo1TXx/extensions/fxdriver@googlecode.com/components/command_processor.js:10778) 

----------------------------------------------------------------------
Ran 1 test in 30.994s

FAILED (errors=1)

我尝试了其他解决方案，但仍然是同样的错误。

Answer 1

您最好尝试通过它的id检索用户名字段和密码字段等唯一元素。 name可能不具有独特性和误导性。

尝试以下find_element_by_id('id_username')和find_element_by_id('id_password')。

有时您需要等待浏览器呈现页面的时间并检索所有内容 - 所以等待一段时间是有用的，例如在你深入了解元素之前三秒钟。

<强>代码

import time

time.sleep(3)
user_name_field = driver.find_element_by_id('id_username')
password_field = driver.find_element_by_id('id_password')

user_name_field.send_keys('your_user_name')
password_field.send_keys('your_password')

password_field.send_keys(Keys.RETURN)
...

此外，我建议您为不同的字段使用不同的变量名称。变量elem可能导致困难。

如上所述的三秒等待时间可能是不可靠的 - 一种确保一些等待时间的更有条理的方式是告诉你driver到implicitly_wait：

driver = webdriver.Firefox()
driver.implicitly_wait(30) # maximally wait 30 seconds before raising an exception.

# ...
# go to the page etc.

驾驶员有两种等待时间的方法：

明确等待：驱动程序在执行每个下一步之前等待此时间。
隐式等待：如果您查找元素，驱动程序会在引发异常之前搜索此时间。

有关详细信息，请参阅文档：http://www.seleniumhq.org/docs/04_webdriver_advanced.jsp#implicit-waits

Answer 2

以下代码使用上一页的elem，但不存在。

elem = elem.find_element_by_name("username")

相反，您应该使用driver：

elem = driver.find_element_by_name("username")

Answer 3

尝试

elem = new WebDriverWait(Driver, 30).until(ExpectedConditions.visibilityOfElementLocated(By.name("username")));

elem.send_keys("my_username@bitbucket.org");

Answer 4

要填写任何类型的表单......最好的方法是在任何可用的情况下都要查看其名称。

    driver=self.webdriver
    driver.find_element_by_name("username").click()
    driver.find_element_by_name("username").send_keys("XXXXX")
    time.sleep(5)
    driver.find_element_by_name("password").click()
    driver.find_element_by_name("password").send_keys("XXXXX")

Selenium webdriver在下一个链接中查找元素

4 个答案: