Polecenie requests (moduł) do poprawnego działania w Python, wymaga "instalacji". W konsoli wpisujemy: pip install requests
import requests
msg = {'username':'usr','password':'XXXX '}
url = "https://store.steampowered.com/login/?redir=&redir_ssl=1/post"
r = requests.post(url, data=msg, verify=True)
print(" ")
print("Used url: " + r.url)
print(" ")
print("Received headers:")
print(r.headers)
print(" ")
print("Received cookies:")
print(r.cookies)
Demo on-line: tutaj