title: Facebook login -Python 3 Requests module
body: <p>Why does this script still bring me to the main page (not logged in)? 
  <em>Imagine the email and pass were good</em></p>
  
  <pre><code>import requests
  par = {'email':'addddd','Pass':'ggdddssd'}
  r = requests.post('https://www.facebook.com',data=par)
  print (r.text)
  </code></pre>
  
  <p>or even trying trying to search with the search bar on youtube:</p>
  
  <pre><code>&lt;input id="masthead-search-term" name="search_query" value="" type="text" tabindex="1"title="Rechercher"&gt;
  
  import requests
  par = {'search_query':'good_songs_on_youtube'}
  r = requests.post('https://www.youtube.com',data=par)
  print (r.text)
  </code></pre>
  
  <p>doesn't make any search... any ideas why?</p>