title: reload a python script using crontable
body: <p>I am using python to import data, but I would like to improve the robustness of my script.
  I added a command to reload the script if it crashes, but I had a problem with: <code>ps -edf</code></p>
  
  <p>In fact I launched my script and I used <code>ctrl+z</code> to stop it. And when I use <code>ps -edf</code> I found that the process is always present.</p>
  
  <p>My questions: there is another way to check if the process is running or not? and why when I use <code>ctrl+z</code> the PID still there. Could I run the python script as a service ?</p>
  
  <p>ps: I couldn't stop the script by using only <code>ctrl+c</code> that's why the use of <code>ctrl+z</code> </p>