Python logging with Supervisor

I'm currently using supervisor to monit and daemonize some python scripts easily. However, it seems that supervisor won't log properly. The scripts I'm executing is as simple as this :

#!/usr/bin/env python
import pushybullet as pb
import sys, time, logging

# INIT LOGGING
logging.basicConfig(format='%(asctime)s @%(name)s [%(levelname)s]:    %(message)s', level = logging.DEBUG)

if __name__ == '__main__':
    try:
            logging.info('Custom service started')
            while True:
                    #here for the sake of example, actually doing real stuff here
                    time.sleep(2)
    finally:
            logging.info('Custom service stopped')

And here is the corresponding conf file :

[program:myscript]
directory=/home/pi/Documents/Scripts_py
command=python -u myscript.py
autostart=true
autorestart=true

So I've tested many things based on many researched on google. Replacing logging lines by print and then flushing stdout indeeds works; same with -u option to launche the script. But print is not adequate for my needs, Python's logging module is. So I tried to flush after each logging line, and to launch the script in unbuffered mod, but nothing appears!

Thanks in advance for any help!

Solution

Thanks to Pedro Rodrigues, I've found. For anyone struggling like me, well just know that you just create a fileHandler like this :

fh = logging.FileHandler('/var/log/supervisor/your_program_name.log')

And add to your program conf file :

stdout_logfile=/var/log/supervisor/%(program_name)s.log

The scripts will write in the log, then read by supervisor, visible on the web interface. One issue it might create is a permission denied if you try to start your script without supervisor.