NoSuchElementException: Using webdriver to get sequences from Uniprot-CodePudding

I am trying to download protein sequences from Uniprot with the following code.

driver = webdriver.Chrome(driver_location)

#get website 
driver.get('https://www.uniprot.org/uniprotkb/P19515/entry#sequences')

#stall to load webpage
time.sleep(5)

#scroll webpage
#driver.execute_script("window.scrollTo(0,document.body.scrollHeight)")


#create instance of button and click
button = driver.find_element_by_link_text("Copy sequence")
button.click()

Running the previous block of code returns the following error

NoSuchElementException: Message: no such element: Unable to locate element: {"method":"link text","selector":"Copy sequence"}

Additionally, here is the css layout enter image description here

I assume the problem is the button is either dynamic or hidden in some way that the webdriver cannot locate the button. I know there is a Uniport API and probably other more efficient ways to download protein sequences but for the sake of learning how can I modify my code and why isn't the button clickable?

CodePudding user response：

Link text only works if the locator has a hyperlink, so in this case it wont work since its a button which copies the the text into the clipboard and doesn't a href tag.

however you can modify your code to

button = driver.find_element(By.CSS_SELECTOR, "button.button.primary.tertiary")

and it will perform the click operation.

CodePudding user response：

link_text only works for a tags, not button tags. But if you use the SeleniumBase framework on GitHub, there's a special TAG:contains("TEXT") selector that you can use to click the button.

Here's a working script: (After installing seleniumbase using pip install seleniumbase, run the script with python or pytest)

from seleniumbase import BaseCase

class RecorderTest(BaseCase):
    def test_recording(self):
        self.open("https://www.uniprot.org/uniprotkb/P19515/entry#sequences")
        self.click('button:contains("Copy sequence")')
        self.sleep(3)

if __name__ == "__main__":
    from pytest import main
    main([__file__])

You can use the SeleniumBase Recorder to generate a script like that from manual browser actions. The last part with if __name__ == "__main__": lets you run the script with python instead of just pytest.