python logging levels

For ease of debugging, the python logging module is encapsulated to support simultaneous output to the console and file, and log file rollback.(1) myloggingconfig. py View code # -*-Coding: UTF-8 -*- ''' Created on 2011-8-24Main purpose:PairProgramGeneral configuration of the loggong mode used in@ Author: jerrykwan ''' Import Logging Import

, such as Log/myapp.logwhen is a string defined as follows: "S": Seconds "M": Minutes "H": Hours "D": Days " W ": Week Day (0=monday)" Midnight ": Roll over at MidnightiNterval refers to the number of units waiting for when the time, logger will automatically rebuild the file, of course, the creation of this file depends on Filename+suffix, if the file has the same name as the previous file, it will automatically overwrite the previous file, So there are cases where the suffix to be defined cann

Python comes with a log processing module loggingThe default log level is debug,info,warning,error,critical, the corresponding function is debug (), INFO (), WARNING (), ERROR (), and CRITICAL ()In [490]: Import Loggingin [491]: log_filename= '/tmp/example.log ' in [492]: Logging.basicconfig (Filename=log_filename, Level=logging. DEBUG) in [493]: logging.debug (' This message should go to the log file ')Vie

('message') OneLogging.log (logging. ERROR,'This is a error test') A #custom levels and information: Logging.log (level,mes)1 #Second, custom configuration log2 #Print to console and write files (create Filehandler and Streamhandler, respectively)3 #Custom splits log content into multiple files at the log level (create multiple files handler)4 #Custom Write file format, content, print format and content (c

the appropriate modifiers, such as Plus = To select only the priority of the log, Plus! Indicates that all logs that are not equal to the priority are selected, and no symbol is selected to select that priority and above the log. * Can be used to represent all the log subsystems and/or message levels. None of the keywords indicates a log with no level specified. If you want to define multiple settings/priorities, use, separate. If you want to define

is actually sys.argv[0]%(filename) S: Print the current name of the executing program%(funcName) s: Print the current function of the log%(Lineno) d: Print the current line number of the log%(asctime) s: Time to print the log%(thread) d: Print thread ID%(threadname) s: Print thread name%(process) d: Print process ID%(message) s: Print log information datefmt: Specifies the time format, same as Time.strftime () level: Sets the log levels by default to

Function: Format output logFive levels debug,info,waring,error,critical, default print waring above level input, can be changed.Default instance is root, do not use default instance when recommended Import loggingimport SYS uses a new instance: # Instantiate logging, must be given a name, default is root, not recommended. Logger_instence = Logging.getlogger ("name") # Sets the instance level, which is disp

) logger.debug ('Logger Debug Message') Logger.info ('Logger Info Message') logger.warning ('Logger warning message') Logger.error ('Logger error message') logger.critical ('Logger Critical Message')The logging library provides multiple components: Logger, Handler, Filter, Formatter. The Logger object provides an interface that the application can use directly, handler sends logs to the appropriate destination, and filter provides a way to filter the

For Python, there have been two problems that have plagued me these days:There is no way to get the current line number and function name directly in 1.python. This is a question raised in the Forum, a group of people are just guessing why Python does not provide __line__ and __func__ like __file__, but ultimately did not find a solution.2. If a function does not

all log messages to a log file, all error levels (errors) and above log messages are sent to standard output, and all severity level (critical) log messages are sent to an e-mail address. in this example, three separate processors are required, each responsible for sending a specific level of messages to a specific location. There are 4 kinds of commonly used:1) logging. Streamhandler Console outputUsing t

()Level: Sets the log levels by default to logging. WARNINGStream: Specifies the output stream that will log, can specify output to Sys.stderr,sys.stdout or file, default output to Sys.stderr, stream is ignored when stream and filename are specified simultaneously3. Output logs to both file and screen at the same time Import loggingLogging.basicconfig (level=

, there is no information level and other information. Logging supports many replacement values. For details, see the formatter documentation. There are three items: time, information level, and log information. (Three items are commonly used)The 7th line formatter is set to the processor.8th rows of processors are added to the log object.Row 3 sets the log output level. Logging provides multiple

Objective It is believed that every programmer should know that when using Python to write background tasks, it is often necessary to use an output log to record the state of the program running, and to save the details of the error in case of an error to debug and analyze. The Python logging module is a good helper in this case. The

#-*-Coding:utf-8-*-Import loggingImport Sys# Gets the logger instance and returns root if the argument is empty loggerLogger = Logging.getlogger ("AppName")# Specify logger output formatFormatter = logging. Formatter ('% (asctime) s% (levelname) -8s:% (message) s ')# file LogFile_handler = logging. Filehandler ("Test.log")File_handler.setformatter (Formatter) # can specify output format by Setformatter# con

I. Introduction and use of logging modulePython uses the logging module to log logs involving four main classes, each of which uses the following functions: Logger: Provides an interface that the application can use directly Handler: Send (logger created) log records to the output of the appropriate destination SetLevel: Provides a fine-grained device to determine which level of

function:FileName: Specify the log file nameFileMode: Same as file function, specify open mode of log file, ' W ' or ' a 'Format: Specifies the formats and contents of the output, format can output a lot of useful information, as in the example above:% (Levelno) S: Print the value of the log level% (levelname) S: Print log level name% (pathname) s: Prints the path of the currently executing program, which is actually sys.argv[0]% (filename) s: Prints the current name of the executing program% (

output, and the format can output a lot of useful information, as shown in the previous example: % (Levelno) S: Print log-level values % (levelname) S: Print log level name % (pathname) s: Prints the path of the current execution program, which is actually sys.argv[0] % (filename) S: Print the current executing program name % (funcName) s: Print the current function of the log % (Lineno) d: Print the current line number of the log % (asctime) s: Time to print log % (thread) d: Print thread ID %

Below for you to share a python through the logging write log to file and console instances, has a good reference value, I hope to be helpful. Come and see it together. As shown below: Import Logging # Creates a logger logger = Logging.getlogger (' MyLogger ') logger.setlevel (logging. DEBUG) # Creates a handler that

When using Python to write background tasks, it is often necessary to use the output log to record the state of the program running and to save the details of the error when an error occurs, so that you do not debug and analyze it. Python's logging module is a good helper in this case. This article introduces the performance of the log logging module in

warning message Parameters of the Logging.basicconfig function:FileName: Specify the log file nameFileMode: Same as file function, specify open mode of log file, ' W ' or ' a 'Format: Specifies the formats and contents of the output, format can output a lot of useful information, as in the example above:% (Levelno) S: Print the value of the log level% (levelname) S: Print log level name% (pathname) s: Prints the path of the currently executing program, which is actually sys.argv[0]% (fi