supervisord logs don’t show my output

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Python output is buffered. Setting the environment variable PYTHONUNBUFFERED=1 in you supervisord.conf will disable buffering and show log messages sooner:

[program:x]
environment = PYTHONUNBUFFERED=1

or add the -u command-line switch to python command:

[program:x]
command = python -u file.py

Alternatively you can flush the sys.stdout handler explicitly:

sys.stdout.flush()

On python 3.3 and up, you can add the flush=True parameter to have the function do this for you:

print(something, flush=True)

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