title: What if the end-user didn't have the required library?
body: <p>My Python project uses various kind of libraries. What is the protocol if the end-user didn't have one or any of them?</p>
  
  <p>Should a window pop up and notify him/her which package and version to download in his/her environment? Or I should include the libraries within my project?</p>
  
  <p>What's the proper action?</p>