Python中的日誌模組

標籤：線程   logs   配置   ati   handlers   name   main   格式   formatter   

最簡單的用法：

import logginglogging.debug("logging debug")logging.info("logging info")logging.warning("user [qianduoduo] attempted wrong password more than 3 times")logging.error("logging error")logging.critical("logging critical")#輸出WARNING:root:user [qianduoduo] attempted wrong password more than 3 timesERROR:root:logging errorCRITICAL:root:logging critical  #root  就是預設的使用者名稱 

重點：為什麼上面debug和info沒有輸出，那是因為一個模組預設的記錄層級是warning，比他層級低的就不會輸出

 

把日誌寫到檔案系統裡

import logginglogging.basicConfig(filename=‘duoduo.log‘,                    level=logging.DEBUG,                    format=‘%(asctime)s %(message)s‘,#asctime字串形式的目前時間，message使用者輸出的訊息                    datefmt=‘%Y-%m-%d %I:%M:%S %p ‘)logging.debug("logging debug")logging.info("logging info")logging.warning("user [qianduoduo] attempted wrong password more than 3 times")logging.error("logging error")logging.critical("logging critical")#輸出到檔案‘duoduo.log’2018-01-27 07:33:30 PM  logging debug2018-01-27 07:33:30 PM  logging info2018-01-27 07:33:30 PM  user [qianduoduo] attempted wrong password more than 3 times2018-01-27 07:33:30 PM  logging error2018-01-27 07:33:30 PM  logging critical

 

format的日誌格式

	Logger的名字
%(levelno)s	數字形式的記錄層級
%(levelname)s	文本形式的記錄層級
%(pathname)s	調用日誌輸出函數的模組的完整路徑名，可能沒有
%(filename)s	調用日誌輸出函數的模組的檔案名稱
%(module)s	調用日誌輸出函數的模組名
%(funcName)s	調用日誌輸出函數的函數名
%(lineno)d	調用日誌輸出函數的語句所在的程式碼
%(created)f	目前時間，用UNIX標準的表示時間的浮 點數表示
%(relativeCreated)d	輸出日誌資訊時的，自Logger建立以 來的毫秒數
%(asctime)s	字串形式的目前時間。預設格式是 “2003-07-08 16:49:45,896”。逗號後面的是毫秒
%(thread)d	線程ID。可能沒有
%(threadName)s	線程名。可能沒有
%(process)d	進程ID。可能沒有
%(message)s	使用者輸出的訊息

 

通過設定檔配置log

{    "version":1,    "disable_existing_loggers":false,    "formatters":{        "simple":{            "format":"%(asctime)s - %(name)s - %(levelname)s - %(message)s"        }    },    "handlers":{        "console":{            "class":"logging.StreamHandler",            "level":"DEBUG",            "formatter":"simple",            "stream":"ext://sys.stdout"        },        "info_file_handler":{            "class":"logging.handlers.RotatingFileHandler",            "level":"INFO",            "formatter":"simple",            "filename":"logs/info.log",            "maxBytes":10485760,            "backupCount":20,            "encoding":"utf8"        },        "error_file_handler":{            "class":"logging.handlers.RotatingFileHandler",            "level":"ERROR",            "formatter":"simple",            "filename":"logs/errors.log",            "maxBytes":10485760,            "backupCount":20,            "encoding":"utf8"        }    },    "loggers":{        "my_module":{            "level":"DEBUG",            "handlers":["info_file_handler"],            "propagate":"no"        }    },    "root":{        "level":"INFO",        "handlers":["console","info_file_handler","error_file_handler"]    }}

 在程式中引用

import jsonimport loggingimport logging.configimport osdef setup_logging(default_path="logging.json", default_level=logging.INFO, env_key="LOG_CFG"):    path = default_path    value = os.getenv(env_key, None)    if value:        path = value    if os.path.exists(path):        with open(path, "r") as f:            config = json.load(f)            logging.config.dictConfig(config)    else:        logging.basicConfig(level=default_level)if __name__ == "__main__":    setup_logging(default_path="logging.json")

 

Python中的日誌模組