How Can I Use WebDriverWait with Selenium to Locate Elements by Class in Dynamic Web Pages?

Leveraging Class Specification with WebDriverWait

In web scraping projects involving websites with dynamic content loaded via JavaScript, integrating the Selenium library with Python enhances efficiency by allowing for control over element identification and loading. This enables waiting until specific elements are rendered before proceeding with scraping.

However, when it comes to specifying elements by class instead of ID, using EC.presence_of_element_located((By.ID, "myDynamicElement")) presents a challenge. To address this, By.class cannot be used with multiple class names, resulting in errors.

Solution

To overcome this limitation and effectively specify elements by class, consider employing other WebDriverWait ExpectedConditions methods such as visibility_of_element_located() or element_to_be_clickable(). Additionally, using CSS_SELECTOR or XPATH allows combining ID and CLASS attributes for precise identification:

CSS_SELECTOR:

element = WebDriverWait(driver, 20).until(EC.visibility_of_element_located(
    (By.CSS_SELECTOR, ".ng-binding.ng-scope#tabla_evolucion"))

XPATH:

element = WebDriverWait(driver, 20).until(EC.visibility_of_element_located(
    (By.XPATH, "//*[@class='ng-binding ng-scope' and @id='tabla_evolucion']"))

Remember, the most suitable solution depends on the specific requirements of your project and website's HTML structure.

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