def wait_until_appeared(browser, css_selector, timeout=10, frequency=1.0):
 wait_until_condition(browser, condition=(lambda x: x.driver.find_element_by_css_selector(css_selector).is_displayed()), timeout=timeout, frequency=frequency)

def wait_until_appeared ( browser , css_selector , timeout = 10 , frequency = 1.0 ) : wait_until_condition ( browser , condition = ( lambda x : x . driver . find_element_by_css_selector ( css_selector ) . is_displayed ( ) ) , timeout = timeout , frequency = frequency )
wait until the element has appeared .