logging_example (1)

Example Python program logging_example (1).py Python version 3.x or newer. To check the Python version use:

python --version

Modules

• import logging

Methods

• def factorial(n):

Code

Python example

# add logging.disable(logging.CRITICAL) for disable logging
import logging

logging.basicConfig(level=logging.DEBUG, format=' %(asctime)s - %(levelname)s
- %(message)s')
logging.debug('Start of program')

def factorial(n):
  logging.debug('Start of factorial( %)' % (n))
  total = 1
  for i in range(n + 1):
    total *= i
    logging.debug('i is ' + str(i) + ', total is ' + str(total))
    logging.debug('End of factorial( %)' % (n))
  return total

print(factorial(5))
logging.debug('End of program')

# Logging to a text file:
logging.basicConfig(filename='myProgramLog.txt', level=logging.DEBUG, format='
%(asctime)s - %(levelname)s - %(message)s')                    


"""
Logging levels
Logging Function
Description
DEBUG
logging.debug()
The lowest level. Used for small details. 
Usually you care about these messages only when diagnosing problems.
INFO
logging.info()
Used to record information on general events in your program or confirm that things are working at their point in the program.
WARNING
logging.warning()
Used to indicate a potential problem that doesn’t prevent the program from working but might do so in the future.
ERROR
logging.error()
Used to record an error that caused the program to fail to do something.
CRITICAL
logging.critical()
The highest level. 
Used to indicate a fatal error that has caused or is about to cause the program to stop running entirely."""

Useful Links

• Articles: https://python-commandments.org/
• Python shell: https://bsdnerds.org/learn-python/
• Tutorial: https://pythonprogramminglanguage.com/