一、
import logging
logging.basicConfig(filename='...',level=logging.DEBUG)
#filename Specifies that a FileHandler be created, using the specified filename, rather than a StreamHandler.
#filemode Specifies the mode to open the file, if filename is specified (if filemode is unspecified, it defaults to 'a').
#format Use the specified format string for the handler.
#datefmt Use the specified date/time format.
#level Set the root logger level to the specified level.(logging.NOTSET,DEBUG,INFO,WARNING,ERROR,CRITICAL(0,10,20,30,40,50)),getLevelName()
#stream Use the specified stream to initialize the StreamHandler. Notethat this argument is incompatible with 'filename' - if bothare present, 'stream' is ignored.
logging.debug("xxx")
#logging.info(),warning(),error(),critical()
二、
import logging
logger=logging.getLogger()
handler=logging.FileHandler('...') #(filename, mode='a', encoding=None, delay=0) filename=std.out?
#logging.StreamHandler(stream=std.err)
#logging.handlers.RotatingFileHandler(filename, mode='a', maxBytes=0, backupCount=0, encoding=None, delay=0)
formatter = logging.Formatter('%(asctime)s %(levelname)s %(message)s') #default "%(message)s"
handler.setFormatter(formatter)
logger.addHandler(handler)
logger.setLevel(logging.NOTSET) #default warning(30)
logger.debug()
三、from flask doc
FORMAT = '%(asctime)-15s %(clientip)s %(user)-8s %(message)s'
logging.basicConfig(format=FORMAT)
d = {'clientip': '192.168.0.1', 'user': 'fbloggs'}
logger = logging.getLogger('tcpserver')
logger.warning('Protocol problem: %s', 'connection reset', extra=d)
would print something like
2006-02-08 22:20:02,165 192.168.0.1 fbloggs Protocol problem: connection reset
