使用 python 中的 selenium 库从网站访问此值

Question

I was able to use selenium to create a driver, and use it to login to this site and load this page

How should I go about trying to access this 2.8 ± 0.5 value? I was able to access the <iframe> by using

iframe = WebDriverWait(driver, timeout=10).until(EC.presence_of_all_element_located((By.TAG_NAME,'iframe')))

but then when I did

iframe.find_element(By.CLASS_NAME,'src')))

I couldn't get anything.

Is there any workaround for how to get this value? Should I try to go to the src link first? Is selenium the correct library to attempt this? Thank you.

Answer 1

You need to switch to the <iframe> before locating elements under it. You can use frame_to_be_available_and_switch_to_it for that

WebDriverWait(driver, timeout=10).until(EC.frame_to_be_available_and_switch_to_it((By.TAG_NAME,'iframe')))

You can also use the id or name attributes without By

WebDriverWait(driver, timeout=10).until(EC.frame_to_be_available_and_switch_to_it('MLVALUEDFT_dielectric_total'))

And now use driver.find_element(...) to locate the element.

To switch back out of the <iframe> use driver.switch_to.default_content()