import logging,os
import time
def getlogger(loggername='mylogger'):
    # 使用一個名字為mylogger的logger
    logger = logging.getLogger(loggername)
    # 設定logger的level為DEBUG
    logger.setLevel(logging.DEBUG)
    # 建立一個輸出日誌到控制檯的StreamHandler

    stream_handler = logging.StreamHandler()

    formatter = logging.Formatter('[%(asctime)s]:[%(filename)s]:%(name)s:%(levelname)s: %(message)s')
    stream_handler.setFormatter(formatter)

    # 給logger新增上handler
    logdir = os.path.dirname(__file__)
    print(logdir)


    # now = time.strftime("%Y-%m-%d %H_%M_%S", time.localtime())
    # filename = '%s/%s.log'%(logdir,now)

   #把log輸出到當前目錄下交usk.log的檔案
    filename = '%s/usk.log' % (logdir)
    print(filename)

    file_handler = logging.FileHandler(filename)
    file_handler.setFormatter(formatter)

    logger.addHandler(stream_handler)#把日誌列印到控制檯
    logger.addHandler(file_handler) #把日誌列印到檔案

    return  logger


#舉例檢視log的形式
logger = getlogger('get_log')
import logging

def foo(s):
    return 10 / int(s)

def bar(s):
    return foo(s) * 2

def main():
    try:
        bar('0')
    except Exception as e:
        #列印log的級別和錯誤資訊
        logger.warning(e)

main()