How to click on onclick link with image? Python Selenium

Question

I'm just learning how to webscrape dynamically using Selenium in Python. I'm currently trying to click on a link within the webpage to page forward over search results.

So far this is the code that I'm using:

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
driver = webdriver.Chrome('C:\\Users\\km13\\chromedriver.exe')
driver.get("http://www.congreso.gob.pe/pley-2016-2021")
elem = driver.find_element_by_css_selector("img[src='/Sicr/TraDocEstProc/CLProLey2016.nsf/8eac1ef603908b5105256cdf006c41b1/$Body/0.AB2?OpenElement&FieldElemFormat=gif']")
elem.click()

This is the HTML that corresponds with the element I'd like to click on:

 `<a href="" onclick="return _doClick('05257FB7005EB655.8eac1ef603908b5105256cdf006c41b1/$Body/0.A50', this, null)"><img src="/Sicr/TraDocEstProc/CLProLey2016.nsf/8eac1ef603908b5105256cdf006c41b1/$Body/0.AB2?OpenElement&amp;FieldElemFormat=gif" width="81" height="16" border="0"></a>`

From my somewhat limited knowledge of HTML this seems like the link is actually embedded in the gif which is why I tried to use the CSS selector that goes along with that image. But this did not work.

Any guidance would be greatly appreciated!

Update: I changed my code by adding the following import

from selenium.webdriver.common.by import By

And I changed the following:

elem = driver.find_element(By.CSS_SELECTOR, "img[src='/Sicr/TraDocEstProc/CLProLey2016.nsf/8eac1ef603908b5105256cdf006c41b1/$Body/0.AB2?OpenElement&FieldElemFormat=gif']")
elem.click()

Now I get an error for "no such element."

Answer 1

There is an iframe.You need to switch to iframe first to access the element.Try below code.use WebDriverWait to handle dynamic element.

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('C:\\Users\\km13\\chromedriver.exe')
driver.get("http://www.congreso.gob.pe/pley-2016-2021")

WebDriverWait(driver, 20).until(EC.frame_to_be_available_and_switch_to_it((By.NAME, 'ventana02')))
elem = WebDriverWait(driver, 10).until(EC.element_to_be_clickable(
    (By.XPATH, "//a[contains(@onclick,'A50')]/img[contains(@src,'Sicr/TraDocEstProc/CLProLey')]")))
elem.click()

EDITED

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('C:\\Users\\km13\\chromedriver.exe')
driver.get("http://www.congreso.gob.pe/pley-2016-2021")
driver.switch_to.frame(0)
elem=WebDriverWait(driver,10).until(EC.element_to_be_clickable((By.XPATH,"//a[contains(@onclick,'A50')]/img[contains(@src,'Sicr/TraDocEstProc/CLProLey')]")))
elem.click()