Python Logging Module

#-*-Coding:utf-8-*-

Import logging
Import Sys

# Gets the logger instance and returns root if the argument is empty logger
Logger = Logging.getlogger ("AppName")

# Specify logger output format
Formatter = logging. Formatter ('% (asctime) s% (levelname) -8s:% (message) s ')

# file Log
File_handler = logging. Filehandler ("Test.log")
File_handler.setformatter (Formatter) # can specify output format by Setformatter

# console Log
Console_handler = logging. Streamhandler (Sys.stdout)
Console_handler.formatter = Formatter # can also be assigned directly to formatter

# The Log processor added for logger
Logger.addhandler (File_handler)
Logger.addhandler (Console_handler)

# Specify the lowest output level of the log, default to warn level
Logger.setlevel (Logging.info)

# output different levels of log
Logger.debug (' This is debug info ')
Logger.info (' This is Information ')
Logger.warn (' This is warning message ')
Logger.error (' This is error message ')
Logger.fatal (' This was fatal message, it is same as logger.critical ')
Logger.critical (' This is critical message ')

# 2016-10-08 21:59:19,493 Info:this is information
# 2016-10-08 21:59:19,493 warning:this is WARNING message
# 2016-10-08 21:59:19,493 error:this is ERROR message
# 2016-10-08 21:59:19,493 critical:this is fatal message, it's same as logger.critical
# 2016-10-08 21:59:19,493 critical:this is CRITICAL message

# Remove some log processors
Logger.removehandler (File_handler)

Python Logging Module