How do I get logger to delete existing log file before writing to it again?

Question

Using the configuration below, my logfile will be called 'test-debug.log' and it will grow infinitely for everytime I run the script. I just want this logfile to contain the log records from the most recent run of the script. The log should be deleted before starting again.

How do I do that?

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

Try this:

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

to open the filename in write mode instead of append mode, clobbering logger.name

More information: logging.FileHandler docs, open() and list of modes