python logging vs print

import logging import sys logger = logging.getLogger() logger.setLevel(logging.INFO) formatter = logging.Formatter('%(asctime)s | %(levelname)s | %(message)s', '%m-%d-%Y %H:%M:%S') stdout_handler = logging.StreamHandler(sys.stdout) stdout_handler.setLevel(logging.DEBUG) stdout_handler.setFormatter(formatter) file_handler = logging.FileHandler('logs.log') file_handler.setLevel(logging.DEBUG) file_handler.setFormatter(formatter) logger.addHandler(file_handler) logger.addHandler(stdout_handler)

import logging """ DEBUG INFO WARNING ERROR CRITICAL """ # asctime: time of the log was printed out # levelname: name of the log # datefmt: format the time of the log # give DEBUG log logging.basicConfig(format='%(asctime)s %(levelname)-8s [%(filename)s:%(lineno)d] %(message)s', datefmt='%d-%m-%Y:%H:%M:%S', level=logging.DEBUG, filename='logs.txt') logger = logging.getLogger('my_app') logger.debug("This is a debug log") logger.info("This is an info log") logger.critical("This is critical") logger.error("An error occurred")

# logging_example.py import logging # Create a custom logger logger = logging.getLogger(__name__) # Create handlers c_handler = logging.StreamHandler() f_handler = logging.FileHandler('file.log') c_handler.setLevel(logging.WARNING) f_handler.setLevel(logging.ERROR) # Create formatters and add it to handlers c_format = logging.Formatter('%(name)s - %(levelname)s - %(message)s') f_format = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s') c_handler.setFormatter(c_format) f_handler.setFormatter(f_format) # Add handlers to the logger logger.addHandler(c_handler) logger.addHandler(f_handler) logger.warning('This is a warning') logger.error('This is an error')

logging.debug vs logger

// get a logger instance named "com.foo"
   Logger logger = Logger.getLogger("com.foo");

   // Now set its level. Normally you do not need to set the
   // level of a logger programmatically. This is usually done
   // in configuration files.
   logger.setLevel(Level.INFO);

   Logger barlogger = Logger.getLogger("com.foo.Bar");

   // This request is enabled, because WARN >= INFO.
   logger.warn("Low fuel level.");

   // This request is disabled, because DEBUG < INFO.
   logger.debug("Starting search for nearest gas station.");

   // The logger instance barlogger, named "com.foo.Bar",
   // will inherit its level from the logger named
   // "com.foo" Thus, the following request is enabled
   // because INFO >= INFO.
   barlogger.info("Located nearest gas station.");

   // This request is disabled, because DEBUG < INFO.
   barlogger.debug("Exiting gas station search");

Posted by: Guest on October-18-2020

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