找不到元素selenium webdriver

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

driver = webdriver.Chrome()
driver.get("http://example.com")

try:
    element = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.ID, "myDynamicElement"))
    )
finally:
    driver.quit()

# 错误的定位器示例
element = driver.find_element(By.ID, "non_existent_id")  # 这将抛出NoSuchElementException

# 正确的定位器示例
element = driver.find_element(By.ID, "correct_id")

element = WebDriverWait(driver, 10).until(
    EC.visibility_of_element_located((By.XPATH, "//div[@class='dynamic-content']"))
)

iframe = driver.find_element(By.TAG_NAME, "iframe")
driver.switch_to.frame(iframe)

# 现在可以正常查找和操作iframe内的元素了
element_inside_iframe = driver.find_element(By.ID, "element_in_iframe")

# 完成操作后切换回主文档
driver.switch_to.default_content()

if driver.current_url != "expected_url":
    raise Exception("Page redirected unexpectedly")