title: Heroku/python failed to detect set buildpack
body: <p>I'm a Django newbie, I created an app and want to deploy it using Heroku. However, when I do <code>git push heroku master</code> (I follow Heroku's getting started), this is what I got:</p>
  
  <pre><code>Counting objects: 36, done.
  Delta compression using up to 4 threads.
  Compressing objects: 100% (33/33), done.
  Writing objects: 100% (36/36), 19.22 KiB | 0 bytes/s, done.
  Total 36 (delta 3), reused 0 (delta 0)
  remote: Compressing source files... done.
  remote: Building source:
  remote: 
  remote: -----&gt; Failed to detect set buildpack https://codon-buildpacks.s3.amazonaws.com/buildpacks/heroku/python.tgz
  remote: More info: https://devcenter.heroku.com/articles/buildpacks#detection-failure
  remote: 
  remote:  !     Push failed
  remote: Verifying deploy....
  remote: 
  remote: !   Push rejected to dry-waters-63931.
  remote: 
  To https://git.heroku.com/dry-waters-63931.git
   ! [remote rejected] master -&gt; master (pre-receive hook declined)
  error: failed to push some refs to 'https://git.heroku.com/dry-waters-63931.git'
  </code></pre>
  
  <p>My root directory:</p>
  
  <pre><code>├── assignment
  ├── household_management (django app)
  ├── templates
  | 
  ├── db.sqlite3
  |
  ├── manage.py
  </code></pre>
  
  <p>I will be very appreciated if you guys can help. I'm really depressed right now...</p>