Python logging - using filters to remove information

Question

I am trying to remove some information while logging to console but then keep that information while logging to a file

Here's a basic example:

import logging
import sys

class MyFilter(logging.Filter):
    def filter(self, record):
        record.msg = record.msg.replace("test", "")
        return True

logger = logging.getLogger("mylogger")
logger.setLevel(logging.DEBUG)

console = logging.StreamHandler(sys.stdout)
console.setLevel("INFO")
logger.addHandler(console)

logfile = logging.FileHandler("log.txt", 'w')
logfile.setLevel("ERROR")
logger.addHandler(logfile)

filt = MyFilter()
console.addFilter(filt)

logger.info("test one")
logger.error("test two")

What I'd like to see on console is

one
two

and then in the log file

test two

but it's actually just

two

I'm assuming editing the LogRecord is what's causing this. Is there a way of achieving what I want or is what I'm trying to do not possible in this way?

wroniasty · Accepted Answer · 2013-05-08 20:36:37Z

3

I think what you need is a logging.Formatter:

class MyFormatter(logging.Formatter):   
    def format(self, record):
       return record.msg.replace("test", "")

#...
console.setFormatter(MyFormatter())
#...

answered May 8, 2013 at 20:36

wroniasty

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