Logging test

__init__.py

# coding: utf-8
import logging
import logging.config
import yaml
import os


def setup_logging(config_path='../config.yaml', default_level=logging.DEBUG):
    """Setup logging configuration
    """
    logger = logging.getLogger(__name__)
    try:
        with open(config_path, 'rt') as f:
            config = yaml.safe_load(f.read())
        logging.config.dictConfig(config.get('logging'))
        logger.debug('Loaded config.yaml')
    except (IOError, OSError, KeyError):
        logging.basicConfig(level=default_level)
        logger.debug('Error occurred when loading config.yaml')
    finally:
        logger.debug('Logger setting is initiated.')


setup_logging()

config.yaml

%YAML 1.2
---
# ---------------------------------
# Config for App.
# ---------------------------------

app:
  foo: "something"
  bar: [1, 2]

# ---------------------------------
# Config for logging
# ---------------------------------
# See http://docs.python.org/3.5/library/logging.config.html#configuration-dictionary-schema
logging:
  version: 1
  disable_existing_loggers: False
  formatters:
    simple:
      format: "%(asctime)s - %(name)s - %(levelname)s - %(message)s"

  handlers:
    console:
      class: logging.StreamHandler
      level: DEBUG
      formatter: simple
      stream: ext://sys.stdout

    debug_file_handler:
      class: logging.handlers.RotatingFileHandler
      level: DEBUG
      formatter: simple
      filename: debug.log
      maxBytes: 10485760 # 10MB
      backupCount: 20
      encoding: utf8

    error_file_handler:
      class: logging.handlers.RotatingFileHandler
      level: WARNING
      formatter: simple
      filename: errors.log
      maxBytes: 10485760 # 10MB
      backupCount: 20
      encoding: utf8

  loggers:
    mymodule:
      level: DEBUG
      handlers: [console, debug_file_handler, error_file_handler]
      propagate: no

    root:
      level: DEBUG
      handlers: [console, debug_file_handler, error_file_handler]

...