[Python] Create a Log for your Python application

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Print statements will get you a long way in monitoring the behavior of your application, but logging will get your further. Learn how to implement logging in this lesson to generate INFO, WARNING, ERROR, and DEBUG logs for your application.

 

 

import sysimport getoptimport logging# pass in: python3 my_log.py -l info# Get command line options# short: l:# long: [log=]opts, args = getopt.getopt(sys.argv[1:], "l:", ["log="])print("opts", opts) #[(‘-l‘, ‘info‘)]print("args", args) #[]# default log levellog_level="INFO"for opt, arg in opts: #opt: -l, arg: info    if opt in ("-l", "--log"):        log_level = getattr(logging, arg.upper())logging.basicConfig(filename="./demo.log", level=log_level, format=‘%(asctime)s %(levelname)s:%(message)s‘)for i in range(0, 100):    if i % 5 == 0:        logging.debug(‘Found a number divisible by 5: {0}‘.format(i))    else:        logging.info(‘At number {0}‘.format(i))logging.warning(‘Finished sequence‘)

 

[Python] Create a Log for your Python application