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@caimaoy caimaoy/log.py
Created Mar 3, 2015

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log.py based on logger
# -*- coding: UTF-8 -*-
import os
import logging
import logging.handlers
def init_log(log_path, level=logging.DEBUG, when="D", backup=7,
format="%(levelname)s: %(asctime)s: %(filename)s:%(lineno)d * %(thread)d %(message)s",
datefmt="%m-%d %H:%M:%S"):
"""
init_log - initialize log module
Args:
log_path - Log file path prefix.
Log data will go to two files: log_path.log and log_path.log.wf
Any non-exist parent directories will be created automatically
level - msg above the level will be displayed
DEBUG < INFO < WARNING < ERROR < CRITICAL
the default value is logging.INFO
when - how to split the log file by time interval
'S' : Seconds
'M' : Minutes
'H' : Hours
'D' : Days
'W' : Week day
default value: 'D'
format - format of the log
default format:
%(levelname)s: %(asctime)s: %(filename)s:%(lineno)d * %(thread)d %(message)s
INFO: 12-09 18:02:42: log.py:40 * 139814749787872 HELLO WORLD
backup - how many backup file to keep
default value: 7
Raises:
OSError: fail to create log directories
IOError: fail to open log file
"""
formatter = logging.Formatter(format, datefmt)
logger = logging.getLogger()
logger.setLevel(level)
dir = os.path.dirname(log_path)
if not os.path.isdir(dir):
os.makedirs(dir)
handler = logging.handlers.TimedRotatingFileHandler(log_path + ".log",
when=when,
backupCount=backup)
handler.setLevel(level)
handler.setFormatter(formatter)
logger.addHandler(handler)
handler = logging.handlers.TimedRotatingFileHandler(log_path + ".log.wf",
when=when,
backupCount=backup)
handler.setLevel(logging.WARNING)
handler.setFormatter(formatter)
logger.addHandler(handler)
# 标准输出
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
# 定义handler的输出格式
ch.setFormatter(formatter)
# 给logger添加handler
logger.addHandler(ch)
return logger
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