tests.py 文件源码

def wait_until_visible(self, css_selector, timeout=10):
        """
        Block until the element described by the CSS selector is visible.
        """
        from selenium.webdriver.common.by import By
        from selenium.webdriver.support import expected_conditions as ec
        self.wait_until(
            ec.visibility_of_element_located((By.CSS_SELECTOR, css_selector)),
            timeout
        )