title: Python requests.get showing 404 while url does exists
body: <p><a href="http://www.leboncoin.fr/montres_bijoux/671762293.htm" rel="noreferrer">http://www.leboncoin.fr/montres_bijoux/671762293.htm</a></p>
  
  <p>I'm trying to open this url </p>
  
  <pre><code>import requests
  s = requests.Session()
  s.headers['User-Agent'] = 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/34.0.1847.116 Chrome/34.0.1847.116 Safari/537.36'
  s.headers['Host'] = 'www.leboncoin.fr'
  url = 'http://www.leboncoin.fr/montres_bijoux/671762293.htm'
  r = s.get(url)
  print r.text
  </code></pre>
  
  <p>when I run this script it shows this error, in my terminal, </p>
  
  <pre><code>&lt;!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"&gt;
  &lt;html&gt;&lt;head&gt;
  &lt;title&gt;404 Not Found&lt;/title&gt;
  &lt;/head&gt;&lt;body&gt;
  &lt;h1&gt;Not Found&lt;/h1&gt;
  &lt;p&gt;The requested URL /montres_bijoux/671762293.htm  was not found on this server.&lt;/p&gt;
  &lt;/body&gt;&lt;/html&gt;
  </code></pre>
  
  <p>while I can open same url in my browser and can see content.</p>
  
  <p>What could be the issue??</p>