Python Selenium: Await Loading of Multiple Elements
Your task involves ensuring that a dynamic list, loaded via AJAX, has multiple li elements before proceeding. The list initially displays a loading message before the actual content becomes available.
Solution Using WebDriverWait with Custom Conditions
The recommended approach is to employ WebDriverWait with a lambda function to define a custom condition. This function allows you to verify that the number of located elements exceeds a specified minimum:
<code class="python">from selenium.webdriver.support import expected_conditions as EC num_elements = 1 WebDriverWait(driver, timeout).until( lambda d: len(d.find_elements_by_css_selector('ul.ltr li[id^="t_b_"] a[id^="t_a_"]')) > num_elements )</code>
Alternative Approaches
- Using ExpectedConditions.presence_of_element_located(): This condition verifies the presence of a specified element, but it doesn't guarantee its visibility or state.
- Using ExpectedConditions.visibility_of_all_elements_located(): This condition ensures that all elements within a locator are visible. This can be used to wait for a specific number of visible elements, but it requires the elements to be present in the DOM from the beginning.
Note
The CSS_SELECTOR and XPATH locators used in the code example can be modified to match your specific element identifiers.
References:
- [How to wait for number of elements to be loaded using Selenium and Python](https://stackoverflow.com/questions/27176170/how-to-wait-for-number-of-elements-to-be-loaded-using-selenium-and-python)
- [Getting specific elements in selenium](https://stackoverflow.com/questions/35383413/getting-specific-elements-in-selenium)
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