如何让记录器在写入之前删除现有的日志文件？

Question

使用下面的配置，我的日志文件将被称为'test-debug.log'，并且每次运行脚本时它都会无限增长。我只想让这个日志文件包含来自最近脚本运行的日志记录。在重新开始之前，应该删除日志。

我该怎么做？

logger = logging.getLogger('test') #Create a log with the same name as the script that created it 
logger.setLevel('DEBUG') 


#Create handlers and set their logging level 
filehandler_dbg = logging.FileHandler(logger.name + '-debug.log') 
filehandler_dbg.setLevel('DEBUG') 


#Create custom formats of the logrecord fit for both the logfile and the console 
streamformatter = logging.Formatter(fmt='%(levelname)s:\t%(threadName)s:\t%(funcName)s:\t\t%(message)s', datefmt='%H:%M:%S') #We only want to see certain parts of the message 


#Apply formatters to handlers 
filehandler_dbg.setFormatter(streamformatter) 


#Add handlers to logger 
logger.addHandler(filehandler_dbg) 

Answer 1

试试这个：

filehandler_dbg = logging.FileHandler(logger.name + '-debug.log', mode='w') 

在write模式而不是append模式下打开的文件名，重挫logger.name

更多信息：logging.FileHandler文档，open() and list of modes