Janky optifine downloader (download without ads lol)

OF-DOWNLOADER.py

from bs4 import BeautifulSoup
from lxml import html as htm
import requests

html = BeautifulSoup(requests.get('https://optifine.net/downloads').content, 'html.parser')
entries = html.find_all('td', class_='colMirror')

links = []
for e in entries:
    links.append(e.a['href'])

if __name__ == '__main__':
    print('Enter corresponding number for Optifine version.')
    print('Type QUIT to exit.')
    for i in range(0, len(links)):
        print(f'[{str(i)}] {links[i].split("?f=")[-1].split(".jar")[0]}')
    running = True
    while running:
        c = input('Selection > ')
        if c == 'QUIT':
            running = False
        if not c.isdigit():
            print('Please enter an integer')
        elif int(c) not in range(0, len(links)):
            print('Not valid option')
        ver = links[int(c)]
        text = requests.get(ver).content
        tree = htm.fromstring(text)
        url = 'https://optifine.net/' + tree.xpath('//*[@id="Download"]/a')[0].attrib['href']
        filename = url.split('?f=')[-1].split('&x=')[0]
        print('Downloading ' + filename)
        with open(filename, 'wb') as f:
            req = requests.get(url, stream=True)
            for chunk in req.iter_content(chunk_size=1024):
                if chunk:
                    f.write(chunk)
            f.close()
        print('Completed')

requirements.txt

lxml
beautifulsoup4
requests