os.rename Windows remove illegal char

[snippsat]

Good that you found an solution,here an other way.
Some advice,should always use Requests.
You see the yellow banner
So this code is for python 3.6 and work on Windows, Python 3.6 and pip installation under Windows

import requests
from bs4 import BeautifulSoup

url = 'http://www.imdb.com/title/tt2527336/?ref_=rlm'
# Test other url
#url = 'http://www.imdb.com/title/tt5294550/?ref_=inth_ov_i'
#url = 'http://www.imdb.com/title/tt5726086/?ref_=inth_ov_tt'

url_get = requests.get(url)
soup = BeautifulSoup(url_get.content, 'lxml')
image = soup.find('div', class_="poster")
image_name = image.find('img').get('alt').replace(':', '')
image_url = image.find('img').get('src')

# Download
response = requests.get(image_url)
with open(f'{image_name}.jpg', 'wb') as f:
        f.write(response.content)