Question

The python logging method can be set to print the time of each event. However if I am running a simulation with its own time variable can that be used in the logger?

The logging Formatter doesn’t seem to have an option for that. Can I overload each of the logger functions?

I would like something like:

counter = 5
logging.debug("First Event")
counter += 2
logging.warn("Second Event")

to produce

DEBUG: 5: First Event
WARNING: 7: Second Event

Answer 1

You could use a logging.Filter:

import logging

class ContextFilter(logging.Filter):
    def filter(self, record):
        record.count = counter
        return True

logging.basicConfig(
    level = logging.DEBUG,
    format = '%(levelname)-8s: %(count)s: %(message)s')
logger = logging.getLogger(__name__)
logger.addFilter(ContextFilter())

counter = 5
logger.debug('First Event')
counter += 2
logger.warning('Second Event')

yields

DEBUG   : 5: First Event
WARNING : 7: Second Event