LOGGING ,  EXCEPTION HANDLING AND RETRIEVE SYSTEM LEVEL INFORMATIONS IN PYTHON

Logging is the process of recording application actions and state to a secondary interface.The below snippet will help you to configure logging in python . The logging module is responsible to logging in python, The config options include the log levels to log , the log file location and the format in which the logging should occur.

Exception handling plays a vital role in programming .The words "try" and "except" are Python keywords and are used to catch exceptions. try-except [exception-name] (see below for examples) blocks The code within the try clause will be executed statement by statement. If an exception occurs, the rest of the try block will be skipped and the except clause will be executed.

The below snippet also helps you to retrieve the system levels informations in python using the sys module in python and it also demonstrates the the assert Statement,  When it encounters an assert statement, Python evaluates the accompanying expression, which is hopefully true. If the expression is false, Python raises an AssertionError exception. If the assertion fails, Python uses ArgumentExpression as the argument for the AssertionError.

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    #snippet in order to demostrate python exception,some standard libraries and logging

import sys as systemInstance

import os as osInstance

import platform as platformInstance

import logging as loggingInstance

import traceback as tracebackInstance

#logging informations : logging configurations and log locations

logFileLocation = osInstance.getcwd() + "python-debug.log"

loggingInstance.basicConfig(level=loggingInstance.DEBUG,format='%(asctime)s : %(levelname)s : %(message)s'

,filename=logFileLocation,filemode='w')

#sys.version_info is a  tuple which contains all the informations like major,mocro,serial and release level

loggingInstance.info(" Printing System level Informations ")

print("sys.version_info.major ",systemInstance.version_info.major)

print("sys.version_info.minor ",systemInstance.version_info.minor)

print("sys.version_info.micro ",systemInstance.version_info.micro)

print("sys.version_info.serial ",systemInstance.version_info.serial)

print("sys.version_info.releaselevel ",systemInstance.version_info.releaselevel)

#Home Drive details

loggingInstance.info(" Printing drive details ")

operatingSystem = print(platformInstance.platform()) #returns the operating system platform with the version and build number

homeDriveLocation = osInstance.getenv('HOMEDRIVE')

homePathLocation = osInstance.getenv('HOMEPATH')

homeLocation = osInstance.getenv('HOME')

print("Home location :: ",homeLocation,"Home Drive Location :: ",homeDriveLocation," Home Path Location :: ",homePathLocation)

loggingInstance.warn("Ending the Show ")

#Usage of Asset and exceptions (assert statement is used to assert that something is true)

listInstance = ["ganga","sathyavati"]   try:     assert len(listInstance) >= 0     assert len(listInstance) == 0   except AssertionError:       #Piece of Code which can exactly drill down which line number and statement exception occured       _, _, tbInstance = systemInstance.exc_info()       tracebackInstance.print_tb(tbInstance)       tableInfo = tracebackInstance.extract_tb(tbInstance)       filename, line, func, text = tableInfo[-1]       loggingInstance.error('An error occurred on line {} in statement {}'.format(line, text))       exit(1)         #storing of varibales is also very easy   listData = ["Gandhāri","Shakuni","Dhritarashtra"]   inst1,inst2,inst3 = listData   print("inst1 ",inst1,"inst2 ",inst2,"inst3 ",inst3)

#python supports extended unpacking of the contends

a, *b, c = [1, 2, 3, 4, 5]

print("a ",a,"b ",b,"c ",c) # a=1,b=[3,4,5],c=5

#revrsing a String is Quite easy

inputString = "Bhishmar"

print(inputString[::-1])