Python Selenium Webdriver: while循环未结束

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

# 创建WebDriver对象
driver = webdriver.Chrome()

# 打开网页
driver.get("https://www.example.com")

# 设置最大等待时间为10秒
wait = WebDriverWait(driver, 10)

# 定义条件判断函数，判断元素是否可见
def element_visible(driver, locator):
    try:
        element = wait.until(EC.visibility_of_element_located(locator))
        return element
    except:
        return None

# 定义元素定位器
locator = (By.ID, "example-element")

# 使用while循环等待元素可见
while not element_visible(driver, locator):
    # 如果元素不可见，则继续等待
    pass

# 元素可见后执行的操作
element = driver.find_element(*locator)
element.click()

# 关闭浏览器
driver.quit()