A simple example of the Python (2.7.6) Standard Log Module, python2.7.6

A simple example of the Python (2.7.6) Standard Log Module, python2.7.6

The logging module in the Python Standard Library provides a set of standard APIs to process log information printing.

import logginglogging.basicConfig(    level    = logging.DEBUG,    format   = '%(asctime)s [%(threadName)s] (%(filename)s:%(lineno)d) %(levelname)s - %(message)s',    datefmt  = '%Y-%m-%d %H:%M:%S',    filename = 'myapp.log',)logging.debug('This is a debug message')logging.info('This is an info message')logging.warning('This is a warning message')

The output log in myapp. log is as follows:

2015-03-11 15:54:34 [MainThread] (logging_demo.py:10) DEBUG - This is a debug message2015-03-11 15:54:34 [MainThread] (logging_demo.py:11) INFO - This is an info message2015-03-11 15:54:34 [MainThread] (logging_demo.py:12) WARNING - This is a warning message

Parameter descriptions of the logging. basicConfig function:

Parameters	Description
Filename	File Name of the FileHandler instance created by the user
Filemode	Log File opening mode. The default value is 'A'
Format	Log output format
Datefmt	Time Output Format
Level	Log level. The size relationship is CRITICAL (50)> ERROR (40)> WARNING (30)> INFO (20)> DEBUG (10)> NOTSET (0)
Stream	Used to initialize the stream of StreamHandler. this parameter is specified with filename and will be ignored.

 

 

 

 

 

 

 

Format symbol in logging:

Symbol	Description
% (Asctime) s	Time
% (Filename) s	File Name
% (FuncName) s	Function Name
% (Levelname) s	Log Level Value
% (Levelno) s	Log Level
% (Lineno) d	Row number
% (Module) s	Module
% (Message) s	Log message
% (Name) s	Log name
% (Pathname) s	Logger name
% (Process) d	Process ID
% (ProcessName) s	Process name
% (Thread) d	Thread ID
% (ThreadName) s	Thread name