Python logging example

python_logging_example.py

import os
import logging
import codecs
import yaml

# config the logging
current_folder = os.path.dirname(os.path.realpath(__file__))
logging_config_filename = os.path.join(current_folder, 'python_logging_example.yaml')
logging.config.dictConfig(yaml.load(codecs.open(logging_config_filename, 'r', 'utf-8')))
logger = logging.getLogger('commonLog')

# example
logger.info("This is a info log.")
logger.error("This is a error log.")

python_logging_example.yaml

version: 1

formatters:
  simple:
    format: '%(levelname)-8s %(name)-15s %(message)s'
    datefmt: '%Y-%m-%d %H:%M:%S'
  normal:
    format: '%(asctime)s|%(levelname)-8s|%(name)-15s|%(message)s'
    datefmt: '%Y-%m-%d %H:%M:%S'

handlers:
  console:
    class: logging.StreamHandler
    level: DEBUG
    formatter: simple
    stream: ext://sys.stdout
  file:
    class : logging.handlers.RotatingFileHandler
    formatter: normal
    filename: /var/log/logname.log
    level: DEBUG
    maxBytes: 10485760 # 10MB
    backupCount: 10

loggers:
  commonLog:
    level: DEBUG
    handlers: [console, file]
    propagate: 1
  root:
    level: DEBUG
    handlers: [console]