logging.info doesn't show up on console but warn and error do

When I log an event with logging.info, it doesn't appear in the Python terminal.

import logging
logging.info('I am info')  # no output

In contrast, events logged with logging.warn do appear in the terminal.

import logging
logging.warn('I am warning')  # outputs "I am warning"

Is there a environment level change I can to make logging.info print to the console? I want to avoid making changes in each Python file.

The root logger always defaults to WARNING level. Try calling

logging.getLogger().setLevel(logging.INFO)

and you should be fine.

Like @ztyx said that default logger level is WARNING. You have to set it to a lower level

You can do it by using logging.basicConfig and setting logger level:

logging.basicConfig(level=logging.DEBUG)

The above solutions didn't work for me, but the code here did:

# set up logging to file
logging.basicConfig(level=logging.DEBUG,
                    format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s',
                    datefmt='%m-%d %H:%M',
                    filename='/temp/myapp.log',
                    filemode='w')
# define a Handler which writes INFO messages or higher to the sys.stderr
console = logging.StreamHandler()
console.setLevel(logging.INFO)
# add the handler to the root logger
logging.getLogger('').addHandler(console)

(I omitted parts of the code for the sake of readability)

This will work

import logging

logging.basicConfig()
logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)

logger.info('its working')

What's the minimum required code for a working module-level logger? I did an experiment (with python version 3.8.6).

The take-away is:

• logging.basicConfig() is needed (however, specifying level=... is NOT needed)
• it's necessary to configure the root logger: logging.getLogger().setLevel(...)

So, a minimum working example is:

# in library/module code
import logging
lg = logging.getLogger('x.y.z')

# in application code
logging.basicConfig()
logging.getLogger().setLevel(logging.INFO)  # configure root logger
lg.info("hi")  # this should print now

Here's the experiment:

In [1]: import logging

In [2]: lg = logging.getLogger('x.y.z')

In [3]: lg.info(1)

In [4]: logging.basicConfig()

In [5]: lg.info(1)

In [6]: logging.basicConfig(level=logging.INFO)

In [7]: lg.info(1)

In [8]: logging.basicConfig()

In [9]: logging.getLogger().setLevel(logging.INFO)

In [10]: lg.info(1)
INFO:x.y.z:1

For those using absl.logging, the equivalent command is

from absl import logging
logging.set_verbosity(logging.INFO)

If you are using Django to power your server, you just simply need to change the log level in your settings.py file as such:

"handlers": {
                "console": {
--                  "level": "WARNING",
++                  "level": "INFO",
                    "class": "logging.StreamHandler",
                    "formatter": "stackdriver",
                }
            },

More examples in the documentation here: https://docs.djangoproject.com/en/4.0/topics/logging/#configuring-logging-1