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                ??一站式輕松地調用各大LLM模型接口,支持GPT4、智譜、豆包、星火、月之暗面及文生圖、文生視頻 廣告
                通常,在商用軟件中均會有完整的日志機制,之前使用C語言實現過一個[《簡單的分級別寫日志程序》](http://blog.csdn.net/dyx1024/article/details/4720484),具有以下功能和不足: ~~~ /************************************/ * 摘 要:此文件實現了普通WINDOWS程序中的日志功能 * 主要有以下特點: * 1. 根據日期創建日志文件目錄,每天的日志分別存放在不同的日志目錄中; * 2. 日志內容分三種類型,根據不同需要,寫不同的日志類型的日志文件, * 方便通過日志定位、分析問題; * 3. 函數經過比較好的封裝,便于復用; * 待改進點: * 1. 為了方便,日志內容打印時使用了time函數,其精確度較低; * 2. 可將這些函數封裝為一個日志類,或者動態庫,使其更通用; * 3. 沒有考慮跨平臺情景,目前只使用于WINDOWS下 * 4. 日志文件內容還可進一步改進,比如打印出當前文件名與行號,使用日志功能 * 更加實用; * * 當前版本:1.0 * 作 者:duanyongxing * 完成日期:2009年10月11日 /************************************/ ~~~ 在Python中,上面以實現的和已經實現的,均可以使用logging模塊迅速搞定,且僅僅只需要一個配置文件,兩行代碼,實現過程如下(僅以輸出的磁盤文件為例,命令輸出只需要修改配置文件即可,具體可查API手冊): 1. 定義配置文件logging.conf: ~~~ [loggers] keys=root,applog [handlers] keys=rotateFileHandler [formatters] keys=applog_format [formatter_applog_format] format=[%(asctime)s - %(name)s]%(levelname)s: %(message)s - %(filename)s:%(lineno)d [logger_root] level=NOTSET handlers=rotateFileHandler [logger_applog] level=NOTSET handlers=rotateFileHandler qualname=simple_example [handler_rotateFileHandler] class=handlers.RotatingFileHandler level=NOTSET formatter=applog_format args=('log_1.log', 'a', 10000, 9) ~~~ 注意前三個[ ]中的keys,這個在后面各[ ]中定義定義,section的取名格式如looger_自定義名稱, handler_自定義名稱,我偷懶直接使用了標準名稱,其他一樣,最后一個要注意的就是format,即日志文件中內容的格式,具體見后面附一。level參數是日志級別,可擴展,如果使用python自己的,有以下四個級別: ~~~ Level Numeric value CRITICAL 50 ERROR 40 WARNING 30 INFO 20 DEBUG 10 NOTSET 0 ~~~ 例如配置文件中level定義為WARN,則INFO, DEBUG,NOTSET三個級別的日志點則不會輸出,很方便的做到了日志級別控制。 args定義了日志方件名,寫方式,最大大小,保存最多個數等屬性。 2.編碼,測試 ~~~ #!/usr/bin/env python # -*- coding: utf-8 -*- import logging import logging.config #日志初始化 LOG_FILENAME = 'logging.conf' logging.config.fileConfig(LOG_FILENAME) logger = logging.getLogger("simple_log_example") #測試代碼 logger.debug("debug message") logger.info("info message") logger.warn("warn message") logger.error("error message") logger.critical("critical message") ~~~ 運行后,查看日志文件,內容如下: ~~~ [2012-02-11 14:47:05,483 - simple_log_example]DEBUG: debug message - test_log.py:48 [2012-02-11 14:47:05,483 - simple_log_example]INFO: info message - test_log.py:49 [2012-02-11 14:47:05,483 - simple_log_example]WARNING: warn message - test_log.py:50 [2012-02-11 14:47:05,483 - simple_log_example]ERROR: error message - test_log.py:51 [2012-02-11 14:47:05,483 - simple_log_example]CRITICAL: critical message - test_log.py:52 ~~~ 如將日志級別設置為WARN,再次運行,查看日志: ~~~ [2012-02-11 14:54:20,046 - simple_log_example]WARNING: warn message - test_log.py:50 [2012-02-11 14:54:20,092 - simple_log_example]ERROR: error message - test_log.py:51 [2012-02-11 14:54:20,092 - simple_log_example]CRITICAL: critical message - test_log.py:52 ~~~ 附一:format參數格式說明: ~~~ Format Description %(name)s Name of the logger (logging channel). %(levelno)s Numeric logging level for the message (DEBUG, INFO, WARNING, ERROR, CRITICAL). %(levelname)s Text logging level for the message ('DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL'). %(pathname)s Full pathname of the source file where the logging call was issued (if available). %(filename)s Filename portion of pathname. %(module)s Module (name portion of filename). %(funcName)s Name of function containing the logging call. %(lineno)d Source line number where the logging call was issued (if available). %(created)f Time when the LogRecord was created (as returned by time.time()). %(relativeCreated)d Time in milliseconds when the LogRecord was created, relative to the time the logging module was loaded. %(asctime)s Human-readable time when the LogRecord was created. By default this is of the form “2003-07-08 16:49:45,896” (the numbers after the comma are millisecond portion of the time). %(msecs)d Millisecond portion of the time when the LogRecord was created. %(thread)d Thread ID (if available). %(threadName)s Thread name (if available). %(process)d Process ID (if available). %(message)s The logged message, computed as msg % args. ~~~
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