logging

 

 

import logging
from conf import settings

def logger(log_type):

    #Generate logger object 
    logger = logging.getLogger(log_type)
    logger.setLevel(settings.LOG_LEVEL)

    #Generate handler object and output log information to file 
    log_file = " %s/log/%s.log " % (settings.BASE_DIR, log_type)
     global fh
    fh = logging.FileHandler(log_file)
    fh.setLevel(settings.LOG_LEVEL)

    # 生成formatter对象
    formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

    # The formatter object is bound to the handler object 
    fh.setFormatter(formatter)
     if logger.handlers:   #Clear logger.handlers, otherwise the log will be printed repeatedly 
        logger.handlers.pop()
     # The handler object is bound to the logger 
    logger.addHandler(fh)

    return logger

logger.py

 

The log of logging can be divided into  debug(), info(), warning(), error() and critical()5 levels

% (name)s Logger's name
 % (levelno)s Log level in numeric form
 % (levelname)s Log level in text form
 % (pathname)s Full pathname of the module calling the log output function, possibly without
 % (filename) s The file name of the module that calls the log output function
 % (module)s The name of the module that calls the log output function
 % (funcName)s The name of the function that calls the log output function
 % (lineno)d The line of code where the statement that calls the log output function is located
 % (created)f The current time, expressed as a floating-point number representing time in UNIX standard
 % (relativeCreated)d When outputting log information, the milliseconds since the Logger was created
 %(asctime)s The current time in the form of a string. The default format is "2003-07-08 16:49:45,896 ". Following the comma is the millisecond
 % (thread)d thread ID. There may be no
 % (threadName)s thread names. There may be no
 % (process)d process ID. Maybe not
%(message)s User output message

custom format