title: HTTP 503 Error while using python requests module
body: <p>I'm trying to make a HTTP request but the website that I currently can reach from my Firefox browser response 503 error. Code itself is really simple. After some search in the net I added <code>user-Agent</code> parameter to request but it didn't help either. Can someone explain me how to get rid of this 503 error?
  Btw I want to make my own alert system based on prices of btc.</p>
  
  <pre><code>import requests
  
  url = "https://www.paribu.com"
  header ={'User-Agent': 'Mozilla/5.0 (Windows NT x.y; Win64; x64; rv:10.0) Gecko/20100101 Firefox/10.0 '}
  
  
  response = requests.get(url,headers = header)
  print(response)
  </code></pre>