切换父元素的frame有什么举例吗

import time

from selenium import webdriver

from selenium.common.exceptions import NoSuchElementException

browser=webdriver.Chrome()

url='http://www.runoob.com/try/try.php?hlename=jqueryui-api-droppable 

browser.get(url)

browser.switch_to.frame('#iframeResult')

source =browser.fnd_element_by_css_selector('#draggable')

print(source) 

try:

logo =browser.fnd_elemerlt_by_class_name('logo') 

except NoSuchElementException:

print('NO LOGO')

browser.switchto.parent frame()

logo =browser.findelementby_class_name('logo') print('logo')

print(logo.text)