customized_logger.py

import logging


class CustomFormatter(logging.Formatter):
    """Logging Formatter to add colors and count warning / errors"""

    grey = "\x1b[38;1m"
    green = "\x1b[32;1m"
    yellow = "\x1b[33;1m"
    red = "\x1b[31;1m"
    bold_red = "\x1b[31;1m"
    reset = "\x1b[0m"
    format = "%(asctime)s - %(levelname)s - %(message)s (%(filename)s:%(lineno)d)"

    FORMATS = {
        logging.DEBUG: grey + format + reset,
        logging.INFO: green + format + reset,
        logging.WARNING: yellow + format + reset,
        logging.ERROR: red + format + reset,
        logging.CRITICAL: bold_red + format + reset
    }

    def format(self, record):
        log_fmt = self.FORMATS.get(record.levelno)
        formatter = logging.Formatter(log_fmt)
        return formatter.format(record)


# create logger with 'spam_application'
logger = logging.getLogger("kam_estimation")
logger.setLevel(logging.INFO)

# create console handler with a higher log level
ch = logging.StreamHandler()
ch.setLevel(logging.INFO)

ch.setFormatter(CustomFormatter())

logger.addHandler(ch)
fh = None


def add_file_handler(logger_, file_name):
    global fh
    if fh is not None:
        logger_.removeHandler(fh)
    fh = logging.FileHandler(file_name)
    fh.setLevel(logging.DEBUG)
    logger_.addHandler(fh)