PythonLearning/68.LoggingInPython.py at Pythontuts · aditya0035/PythonLearning · GitHub

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"""

Logging Module is used to print things out

they can print things on console window or in a file

used by developer for logs purpose on production environment

there are various level of logger

logging comes with python installation but not a global module we need to import that before using that

import logging

for a module the logging configuration are defined once that is once we get the logger instance then it will work

on that configuration although we can give any name to logger every time we called it

there is one logger instance throughout a directory

if no additional configuration are specified it will run with default configuration

"""

#import logging

#logger=logging.getLogger("Logger Name")

"""

Here in logger Name we can give any name but its a good practice to use __name__ so that easy to track for error

also if we give name like database.Query the it will create a logger instance which will inherit configuration

from parent logger which is database

by default the logger Name is inherit from root logger

There are various level of logging in python

1.Debug

2.Info

3.Warning

4.Error

5.Critical

Default level is set to Warning level

Once a config is set and instance is created we can't change the configuration after that if we try to change it it will

not reflected

To set configuration we need to call logging.basiccnfig()

in basic config we can set the logging level

File if need to save to the file

The message format how to save the file search for descriptive message format for logging

"""

import logging

#logging.basicConfig(level=logging.DEBUG,filename="xyz.txt",format="%(asctime)s %(levelname)s: %(message)s")

#here s for string and d for digit

#logger=logging.getLogger(__name__)

#logging.debug("Hello Logging")

"""

Maximum Readability Configurations

%(asctime)s %(levelname)-8s [%(filename)s:%(lineno)d] %(message)s

"""

maximum_readbility_format='%(asctime)s %(levelname)-8s [%(filename)s:%(lineno)d] %(message)s'

logging.basicConfig(level=logging.DEBUG,filename="xyz.txt",format=maximum_readbility_format)

logger=logging.getLogger(__name__)

logging.debug("Hello Logging")

"""

Each time we run a module it does not create a new file it append the content to that file

also we can put handler for logging

apart from that there is dateformat paramter to define date format for message logging

"""

PythonLearning/68.LoggingInPython.py at Pythontuts · aditya0035/PythonLearning · GitHub

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