logging, coloredlogs, logging.config

logger.json

{
    "version": 1,
    "disable_existing_loggers": false,
    "formatters": {
        "console-simple": {
            "()": "ext://coloredlogs.ColoredFormatter",
            "format": "[%(asctime)s.%(msecs)03d] : %(message)s",
            "datefmt": "%H:%M:%S",
            "field_styles": {
                "asctime": {"color": "green"}
            },
            "level_styles": {
                "info": {},
                "warning": {"color": "yellow"},
                "error": {"color": "red"},
                "critical": {"color": "red", "bold": true}
            }
        },
        "console-verbose": {
            "()": "ext://coloredlogs.ColoredFormatter",
            "format": "[%(asctime)s.%(msecs)03d] %(levelname)s : %(message)s",
            "datefmt": "%H:%M:%S",
            "field_styles": {
                "asctime": {"color": "green"},
                "levelname": {"color": "black", "bold": true}
            },
            "level_styles": {
                "debug": {"color": 23},
                "info": {},
                "warning": {"color": "yellow"},
                "error": {"color": "red"},
                "critical": {"color": "red", "bold": true}
            }
        },
        "console-dump": {
            "()": "ext://coloredlogs.ColoredFormatter",
            "format": "[%(asctime)s.%(msecs)03d] [%(threadName)s] [%(module)s:%(funcName)s;%(lineno)d] %(levelname)s : %(message)s",
            "datefmt": "%Y-%m-%d %H:%M:%S",
            "field_styles": {
                "asctime": {"color": "green"},
                "threadName": {"color": 27, "faint": true},
                "module": {"color": "blue"},
                "funcName": {"color": "blue"},
                "lineno": {"color": "blue"},
                "levelname": {"color": "black", "bold": true}
            },
            "level_styles": {
                "debug": {"color": 23},
                "info": {},
                "warning": {"color": "yellow"},
                "error": {"color": "red"},
                "critical": {"color": "red", "bold": true}
            }
        },
        "file-analysis": {
            "format": "[%(asctime)s.%(msecs)03d] : %(message)s",
            "datefmt": "%Y-%m-%d %H:%M:%S"
        },
        "file-dump": {
            "format": "[%(asctime)s.%(msecs)03d] [%(process)s:%(threadName)s] [%(module)s:%(funcName)s;%(lineno)d] %(levelname)s : %(message)s",
            "datefmt": "%Y-%m-%d %H:%M:%S"
        }
    },
    "handlers": {
        "console-simple": {
            "level": "INFO",
            "class": "logging.StreamHandler",
            "formatter": "console-simple",
            "stream": "ext://sys.stdout"
        },
        "console-verbose": {
            "level": "INFO",
            "class": "logging.StreamHandler",
            "formatter": "console-verbose",
            "stream": "ext://sys.stdout"
        },
        "console-dump": {
            "level": "DEBUG",
            "class": "logging.StreamHandler",
            "formatter": "console-dump",
            "stream": "ext://sys.stdout"
        },
        "file-analysis": {
            "level": "INFO",
            "()": "ext://logger._log_file",
            "formatter": "file-analysis",
            "filename": "analysis.log"
        },
        "file-dump": {
            "level": "DEBUG",
            "()": "ext://logger._log_file",
            "formatter": "file-dump",
            "filename": "dump.log"
        },
        "errors": {
            "level": "ERROR",
            "()": "ext://logger._log_file",
            "formatter": "file-dump",
            "filename": "error.log"
        }
    },
    "loggers": {
        "info": {
            "level": "INFO",
            "handlers": ["console-simple"],
            "propagate": false
        },
        "verbose": {
            "level": "INFO",
            "handlers": ["console-verbose", "file-analysis"],
            "propagate": false
        },
        "debug": {
            "level": "DEBUG",
            "handlers": ["console-dump", "file-analysis", "file-dump", "errors"]
        },
        "requests": {
            "level": "WARNING",
            "handlers": ["errors"]
        },
        "urllib3": {
            "level": "WARNING",
            "handlers": ["errors"]
        }
    },
    "root": {
        "level": "CRITICAL",
        "handlers": ["file-analysis", "file-dump", "errors"],
        "propagate": false
    }
}

logger.py

#!/usr/bin/python3
# -*- coding: utf-8 -*-

import coloredlogs
import json
import logging
import logging.config
from datetime import datetime


def _log_file(filename=None):
    ret = 'logs-' + str(datetime.now().strftime("%Y-%m-%d")) + ('-' + filename if filename else '-logging.log')
    return logging.FileHandler(ret)


class Logger:

    def __init__(self, file_config='logger.json'):
        self.file = file_config

    def load(self, name='root'):

        logging.config.dictConfig(json.load(open(self.file)))
        logger = logging.getLogger(name)

        coloredlogs.install(
            logging.DEBUG,
            milliseconds=True,
            reconfigure=False,
            logger=logger,
            )
        return logger

main.py

#!/usr/bin/python3
# -*- coding: utf-8 -*-

from logger import Logger

logger = Logger('logger.json').load('info')
#logger = Logger('logger.json').load('verbose')
#logger = Logger('logger.json').load('debug')


def main():
    logger.debug("this is a debugging message")
    logger.info("this is an informational message")
    logger.warning("this is a warning message")
    logger.error("this is an error message")
    logger.critical("this is a critical message")


if __name__ == '__main__':
    main()

logger = Logger('logger.json').load('verbose')

[06:49:16.293] INFO : this is an informational message
[06:49:16.293] WARNING : this is a warning message
[06:49:16.294] ERROR : this is an error message
[06:49:16.294] CRITICAL : this is a critical message

logger = Logger('logger.json').load('debug')

[2018-08-19 06:49:54.422] [MainThread] [main:main;12] DEBUG : this is a debugging message
[2018-08-19 06:49:54.422] [MainThread] [main:main;13] INFO : this is an informational message
[2018-08-19 06:49:54.422] [MainThread] [main:main;14] WARNING : this is a warning message
[2018-08-19 06:49:54.423] [MainThread] [main:main;15] ERROR : this is an error message
[2018-08-19 06:49:54.423] [MainThread] [main:main;16] CRITICAL : this is a critical message