模块图
代码
#!/usr/bin/env python3# -*- coding: utf-8 -*-#import logging# 【简单日志】# logging.basicConfig(filename='log1.txt',level=logging.DEBUG)# logging.warning('错误')# 【logger handler format】logger=logging.getLogger('abc')logger.setLevel(logging.DEBUG)fh=logging.FileHandler(filename='filehandler.log.txt',mode='a',encoding='utf-8')fh.setLevel(logging.WARNING)formatter=logging.Formatter('%(message)s')fh.setFormatter(formatter)logger.addHandler(fh)logger.debug('debug')logger.info('info')logger.warning('warning')logger.error('error')logger.critical('critical')logger.critical('中文') 或者加入到两个handler处理
#!/usr/bin/env python3# -*- coding: utf-8 -*-#import logging# 【简单日志】# logging.basicConfig(filename='log1.txt',level=logging.DEBUG)# logging.warning('错误')# 【logger handler format】logger=logging.getLogger('abc')logger.setLevel(logging.DEBUG)fh=logging.FileHandler(filename='filehandler.log.txt',mode='a',encoding='utf-8')sh=logging.StreamHandler()fh.setLevel(logging.WARNING)formatter=logging.Formatter('%(message)s')fh.setFormatter(formatter)logger.addHandler(fh)logger.addHandler(sh)logger.debug('debug')logger.info('info')logger.warning('warning')logger.error('error')logger.critical('critical')logger.critical('中文')
yaml配置文件方式 （另一种ini配置文件方式可读性差略）
logging.conf.yaml
version: 1formatters: simple: format: '%(asctime)s - %(name)s - %(levelname)s - %(message)s'handlers: console: class: logging.StreamHandler level: DEBUG formatter: simple stream: ext://sys.stdout fh: class: logging.FileHandler level: DEBUG filename: log.txt mode: a encoding: utf-8loggers: simpleExample: level: DEBUG handlers: [console,fh] propagate: noroot: level: DEBUG handlers: [console]
py ( pip install pyyaml )
#!/usr/bin/env python3# _*_ coding:utf-8 _*_#import loggingimport logging.config # 注意import yamlf=open('logging.conf.yaml')dic=yaml.load(f)print(dic)f.close()logging.config.dictConfig(dic)logger = logging.getLogger('simpleExample')logger.debug('debug message')logger.info('info message')logger.warn('warn message')logger.error('error message')logger.critical('critical message')logger.critical('中文')
附：另一个yaml配置文件参考
version: 1disable_existing_loggers: Falseformatters: simple: format: "%(asctime)s - %(filename)s - %(levelname)s - %(message)s"handlers: console: class: logging.StreamHandler level: ERROR formatter: simple stream: ext://sys.stdout info_file_handler: class: logging.handlers.RotatingFileHandler level: INFO formatter: simple filename: ./mylog/info.log maxBytes: 10485760 # 10MB backupCount: 20 encoding: utf8 error_file_handler: class: logging.handlers.RotatingFileHandler level: ERROR formatter: simple filename: errors.log maxBytes: 10485760 # 10MB backupCount: 20 encoding: utf8loggers: my_module: level: ERROR handlers: [console] propagate: noroot: level: INFO handlers: [console, info_file_handler]
format参数
%(name)s Logger的名字%(levelno)s 数字形式的日志级别%(levelname)s 文本形式的日志级别%(pathname)s 调用日志输出函数的模块的完整路径名，可能没有%(filename)s 调用日志输出函数的模块的文件名%(module)s 调用日志输出函数的模块名%(funcName)s 调用日志输出函数的函数名%(lineno)d 调用日志输出函数的语句所在的代码行%(created)f 当前时间，用UNIX标准的表示时间的浮 点数表示%(relativeCreated)d 输出日志信息时的，自Logger创建以 来的毫秒数%(asctime)s 字符串形式的当前时间。默认格式是 “2003-07-08 16:49:45,896”。逗号后面的是毫秒%(thread)d 线程ID。可能没有%(threadName)s 线程名。可能没有%(process)d 进程ID。可能没有%(message)s用户输出的消息
part2 django中的logging
配置 （dict方式，内容类似yaml）
LOGGING = { 'version': 1, 'disable_existing_loggers': False, 'formatters': { 'verbose': { 'format': '%(levelname)s %(asctime)s %(module)s %(process)d %(thread)d %(message)s' }, 'simple': { 'format': '%(levelname)s %(message)s' }, }, 'filters': { 'special': { '()': 'project.logging.SpecialFilter', 'foo': 'bar', }, 'require_debug_true': { '()': 'django.utils.log.RequireDebugTrue', }, }, 'handlers': { 'console': { 'level': 'INFO', 'filters': ['require_debug_true'], 'class': 'logging.StreamHandler', 'formatter': 'simple' }, 'mail_admins': { 'level': 'ERROR', 'class': 'django.utils.log.AdminEmailHandler', 'filters': ['special'] } }, 'loggers': { 'django': { 'handlers': ['console'], 'propagate': True, }, 'django.request': { 'handlers': ['mail_admins'], 'level': 'ERROR', 'propagate': False, }, 'myproject.custom': { 'handlers': ['console', 'mail_admins'], 'level': 'INFO', 'filters': ['special'] } }} view中使用
# 导入logging库import logging# 获取一个logger对象logger = logging.getLogger(__name__)def my_view(request, arg1, arg): ... if bad_mojo: # 记录一个错误日志 logger.error('Something went wrong!')