How to see the debug messages included in third-party modules of flask?

Question

I would like to see the debug messages for the libraries/modules that I'm using to be displayed along with the debug messages that are present in my code:

app.logger.debug("Print this")

How do I go about it?

Answer 1

You could probably use logging.basicConfig but recommended way is to handle loggers individually. Here is example from official documentation:

from logging import getLogger
loggers = [app.logger, getLogger('sqlalchemy'),
           getLogger('otherlibrary')]
for logger in loggers:
    logger.addHandler(mail_handler)
    logger.addHandler(file_handler)

You may be also find interesting this: How to configure all loggers in an application