How to Handle (Java-)Script Variables in Python?

Question

This opens a new tab in Firefox browser:

from selenium import webdriver
browser = webdriver.Firefox()
browser.execute_script('''window.open("https://www.google.com/","_blank");''')

As a reference, here is the Selenium documentation:

**execute_script**(script, *args)
Synchronously Executes JavaScript in the current window/frame.
Args:
script: The JavaScript to execute.
*args: Any applicable arguments for your >JavaScript.
Usage:
driver.execute_script(‘return document.title;’)

I have a link in a String which I wish to open in a new tab using javascript (via execute_script).

Tried the following but it gives an error:

link = 'https://www.bing.com/'
java_script = '\'\'\'window.open(\"' + link + '\",\"_blank\");\'\'\''
browser.execute_script(script)

Error:

selenium.common.exceptions.JavascriptException: Message: SyntaxError: unexpected token: string literal

use r"string" or """string""" and just don't escape anything — Ahmed I. Elsayed
– Ahmed I. Elsayed, Commented Sep 5, 2020 at 18:06
and to handle variables, execute say "let x = 2; return 2;" and capture this in a python variable, it will work — Ahmed I. Elsayed
– Ahmed I. Elsayed, Commented Sep 5, 2020 at 18:06
Check out f string, there are well suited for the case where you want to put a variable in the middle of a string — Yacine Mahdid
– Yacine Mahdid, Commented Sep 5, 2020 at 18:16

Yacine Mahdid · Accepted Answer · 2020-09-05 18:52:54Z

1

F-string are well suited for that check them out

This will change your code to look like this:

from selenium import webdriver
browser = webdriver.Firefox()
link = 'https://www.bing.com/'
browser.execute_script(f"window.open('{link}','_blank');")

edited Sep 5, 2020 at 18:52

answered Sep 5, 2020 at 18:14

Yacine Mahdid

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2 Comments

AcerWolf Over a year ago

If you add single quotation marks around the curly brackets like (f"window.open('{link}','_blank');") it works as wished. Thanks for helping!

Yacine Mahdid Over a year ago

Cool! I'll add it to the answer

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