How can I get Selenium Web Driver to wait for an element to be accessible, not just present?

Question

I am writing tests for a web application. Some commands pull up dialog boxes that have controls that are visible, but not available for a few moments. (They are greyed out,

Answer 1

I think something along these lines should work as well:

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

browser = webdriver.Firefox()
wait = WebDriverWait(browser, 30)
wait.until(expected_conditions.presence_of_element_located((By.XPATH, "//*[@id='createFolderCreateBrn' and not(@disabled)]")))