javascript - How to locate the element using selenium python in the HTML below -


i'm trying automatic test using selenium .but met wired thing can't locate element. tell me how deal this. i've tried this:

driver.find_element_by_xpath('//*[@onclick="addrule"]').click()

or

driver.find_element_by_css_selector('div.addbutton')

nothing works..

enter image description here

use

i saw there frame

so first switch frame: 

  driver.switch_to_frame("contents")    driver.find_element_by_class_name('addbutton"]').click()

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