A simple example of Python (2.7.6) Log processing

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

ImportLogginglogging.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 logs printed in Myapp.log are 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] (log GING_DEMO.PY:11) Info-this is an INFO message2015-03-11 15:54:34 [Mainthread] (Logging_demo.py:12) Warning-this is a W Arning message

The parameter description of the Logging.basicconfig function:

Parameters	Description
FileName	Log file name
FileMode	Open mode of log file, default to ' a '
Format	Output format of the log
Datefmt	The output format of the time
Level	Log level, size relationship CRITICAL (0) > ERROR (+) > WARNING (+) > INFO > DEBUG (Ten) > NOTSET (+)
Stream	The output stream of the log print, which is ignored when specified with filename

Formatting symbols in Logging:

Symbol	Description
% (Asctime) s	Time
% (filename) s	Filename
% (FuncName) s	Name of function
% (LevelName) s	Log level values
% (Levelno) s	Log level
% (Lineno) d	Line number
% (module) s	Module
% (message) s	Log Messages
% (name) s	Journal name
% (pathname) s	Name of the Logger
% (process) d	Process ID
% (ProcessName) s	Process Name
% (thread) d	Thread ID
% (ThreadName) s	Thread Name

A simple example of Python (2.7.6) Log processing