有没有可能从 find_elements_by_class 获取图像“src”的方法，它只返回 None

Question

I get 250 Total results. I tried to get 10 of the first result's image src but all return None. If i switch to use XPATH it can't be done automatically because there are too many of them to be manually selected.

historylist = WebDriverWait(driver, 100).until(
    EC.presence_of_all_elements_located((By.CLASS_NAME, "coinflip-list__item.coinflip-history-list__item")))
print(f"Total {len(historylist)}")
for x in range(10):
    print(historylist[x].get_attribute("src"))

Total 250 Printing out first 10: <selenium.webdriver.remote.webelement.WebElement (session="d6ac99726310ff2fc4b6070ea0ab7fec", element="7bb1f785-409c-42c8-a85e-b6a7abd9d7be")> <selenium.webdriver.remote.webelement.WebElement (session="d6ac99726310ff2fc4b6070ea0ab7fec", element="4c445a89-003a-4e42-95b5-4dd0648d3a99")> <selenium.webdriver.remote.webelement.WebElement (session="d6ac99726310ff2fc4b6070ea0ab7fec", element="a0d21128-055d-4320-aae1-f1bebb532c2d")> <selenium.webdriver.remote.webelement.WebElement (session="d6ac99726310ff2fc4b6070ea0ab7fec", element="7606d8a6-332b-4584-932f-da0a8203918b")> <selenium.webdriver.remote.webelement.WebElement (session="d6ac99726310ff2fc4b6070ea0ab7fec", element="619896b8-b79d-4dba-b130-869a758402f7")> <selenium.webdriver.remote.webelement.WebElement (session="d6ac99726310ff2fc4b6070ea0ab7fec", element="d20d2480-b7e8-49e3-a66d-127c021d133e")> <selenium.webdriver.remote.webelement.WebElement (session="d6ac99726310ff2fc4b6070ea0ab7fec", element="4a6088 9a-58a4-4a77-a033-9303b001fbfa")> <selenium.webdriver.remote.webelement.WebElement (session="d6ac99726310ff2fc4b6070ea0ab7fec", element="0514a847-0571-4415-b6e6-d9cb96294525")> <selenium.webdriver.remote.webelement.WebElement (session="d6ac99726310ff2fc4b6070ea0ab7fec", element="8b150b8f-31ec-4090-b983-6a5992f97e41")> <selenium.webdriver.remote.webelement.WebElement (session="d6ac99726310ff2fc4b6070ea0ab7fec", element="7f909f2d-3459-47ba-9520-04979d958ddd")>

That's the output.

Answer 1

It looks like your use of By.CLASS_NAME is incorrect. Here

historylist = WebDriverWait(driver, 100).until(
    EC.presence_of_all_elements_located((By.CLASS_NAME, "coinflip-list__item.coinflip-history-list__item")))

CLASS_NAME or find_element_by_class_name or find_elements_by_class_name accepts only a single class. Compound classes are not working.

Change it to By.CSS_SELECTOR :

historylist = WebDriverWait(driver, 100).until(
    EC.presence_of_all_elements_located((By.CSS_SELECTOR, ".coinflip-list__item.coinflip-history-list__item")))

Where coinflip-list__item and coinflip-history-list__item are class names in a single html tag.

Check here for description: https://selenium-python.readthedocs.io/locating-elements.html#locating-elements-by-class-name .

Second , try using visibility_of_all_elements_located instead of presence_of_all_elements_located .

Other than that, check that your locator is correct.