os:windows 7 selenium version 3.0.1 mozilla firefox:48.0.2
Traceback (most recent call last):
File \"C:\\Users\\LENOVO\\Desktop\\kk2.py\", line 4, in
please check the answer:
https://stackoverflow.com/a/37765661
https://stackoverflow.com/a/40208762
Shortly,
From selenium 3.0, you have to explicitly download Marionette geckodriver
for Firefox (which is similar to ChromeDriver for Chrome) and keep it in a place where the system can identify it. (like System PATH - environmental variables in Windows) or specify using language options.
References: