I want to click download button in Selenium in Python

Question

I want to click the download button but it does not work.

I tried:

driver.find_element_by_xpath("""//button[contains(text(),'Download')]]""").click()

Error message is

SyntaxError: Failed to execute 'evaluate' on 'Document': The string '//button[contains(text(),'Download')]]' is not a valid XPath expression.

and tried this code:

driver.find_element_by_xpath("""//*[@id="Download"]""").click()

Error message is:

selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":"//*[@id="Download"]"}

What`s the problem?

Here is my code:

from selenium import webdriver
import time

search = "Acid Value"

driver = webdriver.Chrome('chromedriver.exe')
driver.implicitly_wait(10)
driver.get("https://pubchem.ncbi.nlm.nih.gov/classification/#hid=72")

driver.find_element_by_xpath("//span[contains(text(), 'Chemical and Physical Properties')]").click() # click Chemical and Physical Properties button
driver.find_element_by_xpath("//span[contains(text(), 'Experimental Properties')]").click() # click Experimental Properties button 
    
driver.find_element_by_xpath(f"//span[contains(text(),'{search}')]/parent::li/descendant::span[contains(@class, 'ui-button-text')][2]").click()
#click the Desired properties

driver.implicitly_wait(10) 
    
driver.find_element_by_xpath("""//button[contains(text(),'Download')]]""").click() # error occur here ! 

    
    
driver.implicitly_wait(100) 

driver.find_element_by_xpath("""//button[contains(text(),'SDF')]]""").click() #click the sdf download button
driver.implicitly_wait(100)

Hi, if you can perhaps show us a bit of the dom and the html that creates and surround this button it may be a bit easier to try and help you. Thank you. — Francislainy Campos
– Francislainy Campos, Commented Apr 22, 2021 at 0:35
do you get error mesage ? your xpath seems incorrect - you need triple """ """ instead of single " " — furas
– furas, Commented Apr 22, 2021 at 0:38
always put full error message (starting at word "Traceback") in question (not comment) as text (not screenshot, not link to external portal). There are other useful information. — furas
– furas, Commented Apr 22, 2021 at 0:38
maybe first get all //button and display text in every button - maybe there is no button with Download. Or maybe it has different text, with some extra chars. Or maybe it is in some tag inside button. — furas
– furas, Commented Apr 22, 2021 at 0:39
you have typo - you have too much ] in xpath """//button[contains(text(),'Download')]]""" - you have to remove last ] — furas
– furas, Commented Apr 22, 2021 at 0:44

Arundeep Chohan · Accepted Answer · 2021-04-22 02:06:50Z

1

driver.find_element_by_xpath("//div[contains(text(),'Download')]").click()
driver.find_element_by_xpath("//button[@id='Download']").click()

Simple fix to click the download. You had a typo and the wrong html element. It's a div and not button. It was also in another window so you should driver.switch_to.window(driver.window_handles[1]) to that window.

I would also remove the implicit_wait() they only need to be set once. You can use explicit wait which tend to more stable.

from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait 
from selenium.webdriver.support import expected_conditions as EC


wait=WebDriverWait(driver, 20)
driver.get("https://pubchem.ncbi.nlm.nih.gov/classification/#hid=72")
wait.until(EC.element_to_be_clickable((By.XPATH,"//span[contains(text(), 'Chemical and Physical Properties')]"))).click()
wait.until(EC.element_to_be_clickable((By.XPATH,"//span[contains(text(), 'Experimental Properties')]"))).click()
# click Chemical and Physical Properties button
# click Experimental Properties button 
 
search = "Acid Value"
wait.until(EC.element_to_be_clickable((By.XPATH,f"//span[contains(text(),'{search}')]/parent::li/descendant::span[contains(@class, 'ui-button-text')][2]"))).click()
#click the Desired properties
time.sleep(5)
driver.switch_to.window(driver.window_handles[1])
wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR,"button#Download"))).click()

edited Apr 22, 2021 at 2:06

answered Apr 22, 2021 at 0:59

Arundeep Chohan

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3 Comments

hellomr Over a year ago

thanks your answer but "driver.find_element_by_xpath("//div[contains(text(),'Download')]").click()" code occur same error like "selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":"//div[contains(text(),'Download')]"}"

Arundeep Chohan Over a year ago

It seems that there was a window switch as well.

furas Over a year ago

I also found that there is problem with switched window/tab :) I think you should mention it in answer because it can be the main problem.

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