CODEWITHSUNDEEP
pythonloggingmodule
chandan kumar
chandan kumar

Reputation: 121

Align logging messages of different levels

I'm using Python's logging module like this:

class InitLogging():
    def LogModule(self):
        self.Logger          = logging.getLogger("_TCP_Logger")
        self.Logger.LogLevel = logging.DEBUG
        self.Logger.setLevel(self.Logger.LogLevel)
        self.fh              = logging.FileHandler("Log.txt")
        self.fh.level        = logging.DEBUG
        self.formatter       = logging.Formatter('%(asctime)s %(levelname)s %(message)8s')
        self.Logger.addHandler(self.fh)        
        self.Logger.log(logging.INFO,"=====================================")
        self.Logger.log(logging.INFO,"Start Logging Module!!")
        self.Logger.log(logging.INFO,"=====================================")
        self.fh .setFormatter(self.formatter)
        self.Logger.log(logging.INFO,"Enrty to Logging Module!!")

class LogMsg(InitLogging):
    def Logit(self):
        self.LogModule()
        self.Logger.log(logging.DEBUG,'This is Debugging Message!!')
        self.Logger.log(logging.INFO,"This is Info Message!!")
        self.Logger.log(logging.WARNING,"This is WARNING Message!!")

LoggingInstance = LogMsg()
LoggingInstance.Logit()

When I run my code I get the output below in Log.txt:

=====================================
Start Logging Module!!
=====================================

2013-03-20 17:51:35,135 INFO Enrty to Logging Module!!
2013-03-20 17:51:35,135 DEBUG This is Debugging Message!!
2013-03-20 17:51:35,135 INFO This is Info Message!
2013-03-20 17:51:35,135 WARNING This is WARNING Message!!

But I'd like to align messages of different log levels together, producing output like below:

=====================================
Start Logging Module!!
=====================================
2013-03-20 17:51:35,135 INFO       Enrty to Logging Module!!
2013-03-20 17:51:35,135 DEBUG      This is Debugging Message!!
2013-03-20 17:51:35,135 INFO       This is Info Message!
2013-03-20 17:51:35,135 WARNING    This is WARNING Message!!

How can I do this?

Upvotes: 7

Views: 3616

Answers (1)

Pavel Anossov
Pavel Anossov

Reputation: 62928

Add a width to the levelname field in the formatter's format string.

This is left-aligned:

self.formatter = logging.Formatter('%(asctime)s %(levelname)-10s %(message)s')

                         levelname
                       |----------|
2013-03-20 16:46:50,573 INFO       Enrty to Logging Module!!
2013-03-20 16:46:50,573 DEBUG      This is Debugging Message!!
2013-03-20 16:46:50,573 INFO       This is Info Message!!
2013-03-20 16:46:50,573 WARNING    This is WARNING Message!!

This is right-aligned:

self.formatter = logging.Formatter('%(asctime)s %(levelname)10s %(message)s')

                         levelname
                       |----------|
2013-03-20 16:51:04,648       INFO Enrty to Logging Module!!
2013-03-20 16:51:04,650      DEBUG This is Debugging Message!!
2013-03-20 16:51:04,650       INFO This is Info Message!!
2013-03-20 16:51:04,650    WARNING This is WARNING Message!!
                       |0123456789|
                       | width=10 |

String formatting documentation

Upvotes: 16

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