通过传入日志文件参数的方式来改变日志的存放位置。
废话不多说，直接上代码：
我要评论from logging import getLogger, FileHandler, Formatter, StreamHandler, \
raiseExceptions, INFO, DEBUG, WARN, ERROR
from logging.handlers import RotatingFileHandler, TimedRotatingFileHandler
import os
import sys
loggers = {}
# The background is set with 40 plus the number of the color, and the foreground with 30
def prepareLogging(name, logDir):
global loggers
if loggers.get(name):
return loggers.get(name)
else:
logger = getLogger(name)
# dir must exist, so create dir
# FIXME: if no absolute path is assigned, logs directory will be in the same directory with mainPictureServer.py - use the relative path first.
# any better solution?
if not os.path.exists(logDir):
os.makedirs(logDir)
# TimedRotatingFileHandler : when - (s)econd|(m)inute|(h)our|(d)ay|w0-26(0-monday)|midnight
hdlr = TimedRotatingFileHandler(logDir + "/" + name + ".txt", when="d", interval=1, backupCount=30)
# hdlr = RotatingFileHandler(logDir+"/"+name+".txt", maxBytes=1024<<10, backupCount=30)
# formatter = logging.Formatter('%(asctime)s %(levelname)s %(message)s')
formatter = Formatter(
'%(thread)-6.6s %(asctime)s.%(msecs)02.2d %(filename)-12.12s_%(lineno)03d %(levelname)-3.3s] %(message)s',
'%m-%d %H:%M:%S')
hdlr.setFormatter(formatter)
logger.addHandler(hdlr)
ch = StreamHandler()
ch.setLevel(INFO)
formatter = Formatter(
'%(thread)-4.4s %(asctime)s.%(msecs)02.2d %(filename)-12.12s_%(lineno)03d] %(levelname)-2.2s] %(message)s',
'%M:%S')
ch.setFormatter(formatter)
# logger.propagate = False #without this, message will be duplicated
logger.addHandler(ch)
loggers[name] = logger
logger.setLevel(INFO)
return logger
if hasattr(sys, 'frozen'): # support for py2exe
_srcfile = "logging%s__init__%s" % (os.sep, __file__[-4:])
elif __file__[-4:].lower() in ['.pyc', '.pyo']:
_srcfile = __file__[:-4] + '.py'
else:
_srcfile = __file__
_srcfile = os.path.normcase(_srcfile)
if hasattr(sys, '_getframe'):
currentframe = lambda: sys._getframe(3)
else: # pragma: no cover
def currentframe():
"""Return the frame object for the caller's stack frame."""
try:
raise Exception
except Exception:
return sys.exc_info()[2].tb_frame.f_back
class MyLogger(object):
# as the caller will be MyLogger, so need copy logger implement for info(), warning, error()
def __init__(self, logger):
self.logger = logger
def debug(self, msg, *args, **kwargs):
if self.logger.isEnabledFor(DEBUG):
self._log(DEBUG, msg, args, **kwargs)
def info(self, msg, *args, **kwargs):
if self.logger.isEnabledFor(INFO):
self._log(INFO, msg, args, **kwargs)
def warn(self, msg, *args, **kwargs):
if self.logger.isEnabledFor(WARN):
self._log(WARN, msg, args, **kwargs)
def error(self, msg, *args, **kwargs):
if self.logger.isEnabledFor(ERROR):
self._log(ERROR, msg, args, **kwargs)
def _log(self, level, msg, args, exc_info=None, extra=None):
"""
Low-level logging routine which creates a LogRecord and then calls
all the handlers of this logger to handle the record.
"""
# Add wrapping functionality here.
if _srcfile:
# IronPython doesn't track Python frames, so findCaller throws an
# exception on some versions of IronPython. We trap it here so that
# IronPython can use logging.
try:
fn, lno, func = self.findCaller()
except ValueError:
fn, lno, func = "(unknown file)", 0, "(unknown function)"
else:
fn, lno, func = "(unknown file)", 0, "(unknown function)"
if exc_info:
if not isinstance(exc_info, tuple):
exc_info = sys.exc_info()
record = self.logger.makeRecord(
self.logger.name, level, fn, lno, msg, args, exc_info, func, extra)
self.logger.handle(record)
def findCaller(self):
"""
Find the stack frame of the caller so that we can note the source
file name, line number and function name.
"""
f = currentframe()
# On some versions of IronPython, currentframe() returns None if
# IronPython isn't run with -X:Frames.
if f is not None:
f = f.f_back
rv = "(unknown file)", 0, "(unknown function)"
while hasattr(f, "f_code"):
co = f.f_code
filename = os.path.normcase(co.co_filename)
if filename == _srcfile:
f = f.f_back
continue
rv = (co.co_filename, f.f_lineno, co.co_name)
break
return rv
def log(self, level, msg, *args, **kwargs):
"""
Log 'msg % args' with the integer severity 'level'.
To pass exception information, use the keyword argument exc_info with
a true value, e.g.
logger.log(level, "We have a %s", "mysterious problem", exc_info=1)
"""
if not isinstance(level, int):
if raiseExceptions:
raise TypeError("level must be an integer")
else:
return
if self.logger.isEnabledFor(level):
self._log(level, msg, args, **kwargs)
def _prefix(self, elevId):
if str(elevId) == '1':
prefix = ''
else:
prefix = ' ' * 30
return prefix
def infoE(self, elevId, msg, *args, **kwargs):
self.info("{}{}".format(self._prefix(elevId), msg), *args, **kwargs)
def warnE(self, elevId, msg, *args, **kwargs):
self.warn("{}{}".format(self._prefix(elevId), msg), *args, **kwargs)
def errorE(self, elevId, msg, *args, **kwargs):
self.error("{}{}".format(self._prefix(elevId), msg), *args, **kwargs)
def print0(self, msg, *args, **kwargs):
method_name = sys._getframe(1).f_code.co_name
line_no = sys._getframe(1).f_lineno
_m = "{}_{}:{}{}".format(method_name, line_no, "", msg)
print(_m)
self.debug(_m, *args, **kwargs)
def printE(self, elevId, msg, *args, **kwargs):
p = self._prefix(elevId)
method_name = sys._getframe(1).f_code.co_name
line_no = sys._getframe(1).f_lineno
_m = "{}_{}:{}{}".format(method_name, line_no, p, msg)
print(p + msg)
self.debug(p + msg, *args, **kwargs)
def logtt(logger):
logger.info('hello logs')
if __name__ == '__main__':
logger = MyLogger(prepareLogging("hello", './logs'))
logtt(logger)
本文地址：https://blog.csdn.net/qq_43030934/article/details/107339983
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