Why doesn't crontab start python?

Question

linux

Normal python(a) program to check if Cron(a) is working. I run
it every minute...
But CRON does not run the program... Runs
from console.
Help, please, I've already broken my head ...

Answer 1

which python3.9
output is the path to the python, this command must be written in the cron

Answer 2

And where is your user from under which you need to run the script? Or, if this is not a crontab, but someone's personal cron (in which the user does not need to be specified for obvious reasons) - does this "someone" have access to the directory /rootand the script itself?

Answer 3

And so, it seemed to be decided ........
With such an entry in the KRON
*/1 * * * * /usr/local/bin/python3.9 /root/2.py &