Crontab created by www-data user not working

I have a python that creates a cron job in order to call another python script, but it's not working properly.

In the first python I have:

from crontab import CronTabcron = CronTab(user=True)job = cron.new(command='/usr/bin/python3 /home/ubuntu/dev/alarm.py')job.minute.every(1)cron.write()

When I execute sudo crontab -u www-data -e I can see it as:

* * * * * /usr/bin/python3 /home/ubuntu/dev/alarm.py

But it's not executing this alarm.py script. If I try to execute the alarm.py script as www-data user I get error to import modules, because they were installed as user ubuntu.

I.E.:

$ sudo -u www-data /usr/bin/python3 /home/ubuntu/dev/alarm.pyTraceback (most recent call last):  File "/home/ubuntu/dev/alarm.py", line 1, in <module>    from pushover import PushoverModuleNotFoundError: No module named 'pushover'

So I manually changed the www-data crontab to:

* * * * * ubuntu /usr/bin/python3 /home/ubuntu/dev/alarm.py

In order to execute as ubuntu user. But still not working.

Anything wrong here?

thanks.