title: heroku: no default language could be detected for this app
body: <p>First time using Heroku. Trying to push. I have run the command:</p>
  
  <p><code>heroku create --buildpack heroku/python</code></p>
  
  <p>and it displayed</p>
  
  <pre><code>$ heroku create --buildpack heroku/python
  Creating app... done, glacial-reef-7599
  Setting buildpack to heroku/python... done
  https://glacial-reef-7599.herokuapp.com/ | https://git.heroku.com/glacial-reef-7599.git
  </code></pre>
  
  <p>Stack trace:</p>
  
  <pre><code>$ git push heroku master
  Counting objects: 129, done.
  Delta compression using up to 8 threads.
  Compressing objects: 100% (124/124), done.
  Writing objects: 100% (129/129), 69.06 KiB | 0 bytes/s, done.
  Total 129 (delta 22), reused 0 (delta 0)
  remote: Compressing source files... done.
  remote: Building source:
  remote:
  remote:  !     No default language could be detected for this app.
  remote:                         HINT: This occurs when Heroku cannot detect the buildpack to use for this application automatically.
  remote:                         See https://devcenter.heroku.com/articles/buildpacks
  remote:
  remote:  !     Push failed
  remote: Verifying deploy...
  remote:
  remote: !       Push rejected to pure-badlands-9125.
  remote:
  To https://git.heroku.com/pure-badlands-9125.git
   ! [remote rejected] master -&gt; master (pre-receive hook declined)
  error: failed to push some refs to 'https://git.heroku.com/pure-badlands-9125.git'
  </code></pre>
  
  <p>I've gotta be missing something.</p>
  
  <p>I have added a <code>requirements.txt</code> to my root directory. It looks like this:</p>
  
  <pre><code>.git
  .idea
  projectapp
  projectname
  rango
  db.sqlite3
  manage.py
  populate_rango.py
  requirements.txt
  </code></pre>