Is there a way to log python print statements in gunicorn?

Question

With my Procfile like this:

web: gunicorn app:app \\
    --bind \"$HOST:$PORT\" \\
    --debug --error-logfile \"-\" \\
    --enable-stdio-inheritance \\
    --r         


        

Answer 1

It turns out the print statements were actually getting through, but with delay.

The gunicorn docs for --enable-stdio-inheritance note to set the PYTHONUNBUFFERED, which I thought I had, but it seems with wrong syntax.

I solved it using a .env file with my foreman setup to set the variable like this:

PYTHONUNBUFFERED=TRUE