How to correctly write css_selector of an element from a set of elements in the WebDriverWait method?

Question

Python

I have some sheet with elements:

example_list = self.driver.find_elements_by_css_selector("div.holder")

In it, I'm looking for the element I need:

example_list.find_element_by_css_selector("i.icon")

This element must be clickable.
How to correctly enter this element into the waiting: If you just needed to find the element by id or another parameter, the question would not arise. And then an element from an element ...
WebDriverWait(self.driver, 10).until()

Answer 1

@fandorin_official
try creating a class that
takes both locators and does both lookups:

class waittest:
    def __init__(self, locator1, locator2, attr, value):
        self._locator1 = locator1
        self._locator2 = locator2
        self._attribute = attr
        self._attribute_value = value

    def __call__(self, driver):
        element1 = driver.find_element_by_xpath(self._locator1)
        # опущена проверка что element1 хороший
        element2 = element1.find_element_by_xpath(self._locator2)
        if element2.get_attribute(self._attribute) == self._attribute_value:
            return element2
        else:
            return None

driver = webdriver.Firefox()
driver.get('http://www.ubuntu.com/')
try:
    element = WebDriverWait(driver, 10).until(
        waittest('//*[@id="navigation"]/div/div/div','a[@href="/"]', 'class', 'p-navigation__link')
    )
    if element != None:
        print element.get_attribute('innerHTML')
except TimeoutException:
     pass

driver.close()
driver.quit()

will print the ubuntu logo (svg). EMNIP in Java the same problem with the signature