Python-implemented system practical log instance

Python-implemented system practical log instance

This article describes the practical log classes implemented by python. Share it with you for your reference. The details are as follows:

Every system must have a log class to help you understand the running status and troubleshooting of the system. python provides a logger, which is very powerful, you just need to encapsulate it a little and put it in your own system. below is my own log class

File Name: logger. py

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"This module takes care of the logging Logger helps in creating a logging system for the application Logging is initialised by function LoggerInit. """ Import logging Import OS Import sys Class logger (object ): "Class provides methods to perform logging .""" M_logger = None Def _ init _ (self, opts, logfile ): "Set the default logging path .""" Self. opts = opts Self. myname = 'dxscs' Self. logdir = '.' Self. logfile = logfile Self. filename = OS. path. join (self. logdir, self. logfile) Def loginit (self ): "Callfunction LoggerInit to start initialising the logging system .""" Logdir = OS. path. normpath (OS. path. expanduser (self. logdir )) Self. logfilename = OS. path. normpath (OS. path. expanduser (self. filename )) If not OS. path. isdir (logdir ): Try: OS. mkdir (logdir) Counter t OSError, e: Msg = ('(% s)' % e) Print msg Sys. exit (1) Self. logger_init (self. myname) Def logger_init (self, loggername ): "Initialise the logging system. This operation des logging to console and a file. By default, console prints Messages of level WARN and above and file prints level INFO and above. In DEBUG mode (-D command line option) prints messages of level DEBUG And above to both console and file. Args: Loggername: String-Name of the application printed along with the log Message. """ Fileformat = '[% (asctime) s] % (name) s: [% (filename) s: % (lineno) d]: % (levelname)-8 s: % (message) s' Logger. m_logger = logging. getLogger (loggername) Logger. m_logger.setLevel (logging. INFO) Self. console = logging. StreamHandler () Self. console. setLevel (logging. CRITICAL) Consformat = logging. Formatter (fileformat) Self. console. setFormatter (consformat) Self. filelog = logging. FileHandler (filename = self. logfilename, mode = 'W + ') Self. filelog. setLevel (logging. INFO) Self. filelog. setFormatter (consformat) Logger. m_logger.addHandler (self. filelog) Logger. m_logger.addHandler (self. console) If self. opts ['debug'] = True: Self. console. setLevel (logging. DEBUG) Self. filelog. setLevel (logging. DEBUG) Logger. m_logger.setLevel (logging. DEBUG) If not self. opts ['nofork']: Self. console. setLevel (logging. WARN) Def logstop (self ): "Shutdown logging process .""" Logging. shutdown () # Test If _ name _ = '_ main __': # Debug mode & not in daemon Opts = {'debug': True, 'nofork': True} Log = logger (opts, 'dxscs _ source. log ') Log. loginit () Log. m_logger.info ('hello, World ')

Execution result:

[16:56:01, 498] dxscs: [logger. py: 88]: INFO: hello, world

If you only need to display it in the file, you can set both debug and nofork options to false.

I hope this article will help you with Python programming.