My first crawling code (and this is the one survived from numerous errors)
You should donwload the right version of chromedriver. You can easily do this following a few steps...
Open Chrome -> Settings -> About Chrome
Now you'll see the version of your Chrome. Then you should download the right driver from https://chromedriver.chromium.org/downloads
First, open the website you want to crawl the images in it.
Then open DevTools. Now find the specific "class" that those images have in common...
In the code I used
class_='row w_banner'
You should find the appropriate one(but it is so easy in most cases, don't worry)
For the part
filename, headers = opener.retrieve(i, str(n)+'.jpg')
You can change the name of the file to your preference.