How do I write Flask's excellent debug log message to a file in production?

Question

I have a Flask application that works well and produces an occasional error, which is visible when it is running with debug=True:

if __name__ =         


        

Answer 1

If you are using gunicorn to run your Flask app, you can log all Flask exceptions to the gunicorn logs by adding the gunicorn error handlers to the Flask logger:

In module/__init__.py:

@app.before_first_request
def setup_logging():
    if not app.debug:
        import logging
        gunicorn_logger = logging.getLogger('gunicorn.error')
        for handler in gunicorn_logger.handlers:
            app.logger.addHandler(handler)