title: YouCompleteMe does not work for python
body: <p>I'm not sure if this is some kind of bug (probably not, otherwise everyone would complain) and without a google account, I can't use the google group, so I try my luck here in the hope that somebody has a suggestion.</p>
  
  <p>I have YouCompleteMe installed with clang-completer and stuff works fine for C, C++. Now I edit a <code>.py</code> file, and the only completions offered are the words already in the buffer. No semantic completion. <code>:YcmCompleter</code> prints <code>No semantic completer exists for filetypes: [u'py']</code>. I have removed everything except the following from my <code>.vimrc</code>: </p>
  
  <pre><code>call pathogen#infect()
  Helptags
  
  filetype on
  </code></pre>
  
  <p>To no avail. Does anybody have an idea how to better diagnose the problem?</p>
  
  <p><strong>Edit:</strong> I realised I did not have <code>jedi</code> installed. So I ran <code>pip install jedi</code> which strangely changed nothing.</p>