title: Why does Sublime Text 3 give me a "python: command not found" error
body: <p>I am getting an error 
  "</p>
  
  <blockquote>
    <p>[Finished in 0.0s with exit code 127] [shell_cmd: python -u
    "/bin/apturl-gtk"] [dir: /usr/bin] [path:
    /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin]bash:
    python: command not found </p>
  </blockquote>
  
  <p>I have python 3.7 installed, and am running Ubuntu. What do I do?</p>