title: What should I put in my conda envirnment file to install python-dev?
body: <p>I have conda environment file <code>conda.yml</code>:</p>
  
  <pre><code>name: env
  
  channels:
    - pytorch
  
  dependencies:
    - python=3.7.*
    - python-dev
    - python3-distutils
  </code></pre>
  
  <p>But the line <code>- python-dev</code> and <code>python3-distutils</code> does not work. What should I put to get the python development tools?</p>