title: What is the difference between deps and dev-deps in Poetry?
body: <p>In the <em>pyproject.toml</em> configuration file of Poetry you can specify both <code>dependencies</code> and <code>dev-dependencies</code>, but the documentation does not state clearly what the difference is.</p>
  
  <p>I guess from the name the <em>dev-dependencies</em> will not be installed by a release build, but I didn't notice any difference. How do you use these fields correctly, for example exclude the <em>dev-dependencies</em> in a build?</p>