I've been struggling with my company proxy to make an https request.

import requests
from requests.auth import HTTPProxyAuth

proxy_string = 'http://user:password@url_proxt:port_proxy'

s = requests.Session()
s.proxies = {"http": proxy_string , "https": proxy_string}
s.auth = HTTPProxyAuth(user,password)

r = s.get('http://www.google.com') # OK
print(r.text)
r = s.get('https://www.google.com',proxies={"http": proxy_string , "https": proxy_string}) #OK
print(r.text)
r = s.get('https://www.google.com') # KO
print(r.text)

When KO, I have the following exception :

HTTPSConnectionPool(host='www.google.com', port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy Authentication Required',)))

I looked online but didn't find someone having this specific issue with HTTPS.

Thank you for your time

Thanks to the amazing help of Lukasa, I solved my issue.

Please see discussion on fix here or set :

session.trust_env=False