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我正在使用 selenium 来抓取一些数据。

我点击的页面上有一个按钮说“custom_cols”。此按钮为我打开一个窗口，我可以在其中选择我的列。

这个新窗口有时需要一些时间才能打开（大约 5 秒）。所以为了处理这个我用过

WebDriverWait

延迟为 20 秒。但有时它无法选择在新窗口上查找元素，即使该元素是可见的。这种情况只发生十次，其余时间正常工作。

我也在其他地方使用了相同的功能（WebDriverWait），它按预期工作。我的意思是它会等到元素变得可见，然后在找到它的那一刻点击它。

我的问题是为什么即使我正在等待元素可见，新窗口上的元素也不可见。要在此处添加，我已尝试增加延迟时间，但我仍然偶尔会收到该错误。

我的代码在这里

def wait_for_elem_xpath(self, delay = None, xpath = ""):
    if delay is None:
        delay = self.delay

    try:
        myElem = WebDriverWait(self.browser, delay).until(EC.presence_of_element_located((By.XPATH , xpath)))
    except TimeoutException:
        print ("xpath: Loading took too much time!")
    return myElem
select_all_performance = '//*[@id="mks"]/body/div[7]/div[2]/div/div/div/div/div[2]/div/div[2]/div[2]/div/div[1]/div[1]/section/header/div'
self.wait_for_elem_xpath(xpath = select_all_performance).click()
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1 回答 1

12

一旦您等待元素并在尝试调用click()方法而不是使用presence_of_element_located()方法时继续前进，您需要使用element_to_be_clickable()如下：

try:
    myElem = WebDriverWait(self.browser, delay).until(EC.element_to_be_clickable((By.XPATH , xpath)))

更新

根据您在评论中的反问题，这里是三种方法的详细信息：

Presence_of_element_located

Presence_of_element_located(locator)定义如下：

class selenium.webdriver.support.expected_conditions.presence_of_element_located(locator)

Parameter : locator - used to find the element returns the WebElement once it is located

Description : An expectation for checking that an element is present on the DOM of a page. This does not necessarily mean that the element is visible or interactable (i.e. clickable).

可见性元素定位

visibility_of_element_located(locator)定义如下：

class selenium.webdriver.support.expected_conditions.visibility_of_element_located(locator)

Parameter : locator -  used to find the element returns the WebElement once it is located and visible

Description : An expectation for checking that an element is present on the DOM of a page and visible. Visibility means that the element is not only displayed but also has a height and width that is greater than 0.

element_to_be_clickable

element_to_be_clickable(locator)定义如下：

class selenium.webdriver.support.expected_conditions.element_to_be_clickable(locator)

Parameter : locator - used to find the element returns the WebElement once it is visible, enabled and interactable (i.e. clickable).

Description : An Expectation for checking an element is visible, enabled and interactable such that you can click it.
于 2018-04-11T12:58:18.567 回答