demon in python

Question

Python

Hello toaster!
In general, such a task is worth it, there is a python script that runs a cron every 5 minutes, but the script can work for 2 minutes or 20 minutes in time.
When starting the script, it is necessary to check if the script has worked and if so, then execute it; if not, then exit! I do not know how to solve this, tell me who can come across!

Answer 1

with a file is the easiest option. Just what happens if the script fails with an error and the file remains? Here it is also possible that you need to monitor the date of modification of this file, if more than, for example, 30 minutes, then rewrite ...

Answer 2

When you run the script, you can write a file to / tmp, and delete it at the end of the work. And check if there is a file, then exit.

Answer 3

Or look at processes...