Prepend to logging message

[Joan Miller]

How to prepend anything to a logging message? Is possible to do it
from the dictionary object (ExtraLog) or is there is that override
process() [1]?

------------------
class ExtraLog(object):

def __getitem__(self, name):
if name == 'foo':
result = 'testing'
return result

def __iter__(self):
keys = ['foo',]
keys.extend(self.__dict__.keys())
return iter(keys)

logger = logging.LoggerAdapter(logging.getLogger('foo'), ExtraLog())
------------------

[1] http://docs.python.org/library/logging.html#logging.LoggerAdapter

[Ishwor Gurung]

Joan,

2010/1/10 Joan Miller <pelo...@gmail.com>:

> How to prepend anything to a logging message? Is possible to do it
> from the dictionary object (ExtraLog) or is there is that override
> process() [1]?
>
> ------------------
> class ExtraLog(object):
>
>    def __getitem__(self, name):
>        if name == 'foo':
>            result = 'testing'
>        return result
>
>    def __iter__(self):
>        keys = ['foo',]
>        keys.extend(self.__dict__.keys())
>        return iter(keys)
>
> logger = logging.LoggerAdapter(logging.getLogger('foo'), ExtraLog())
> ------------------

Yep. Just subclass LoggerAdapter and override process(..)
Read this: http://docs.python.org/library/logging.html#adding-contextual-information-to-your-logging-output
--
Regards
Ishwor Gurung
Key id:0xa98db35e
Key fingerprint:FBEF 0D69 6DE1 C72B A5A8 35FE 5A9B F3BB 4E5E 17B5

[Joan Miller]

On 10 ene, 03:27, Ishwor Gurung <ishwor.gur...@gmail.com> wrote:
> Joan,
>
> 2010/1/10 Joan Miller <pelok...@gmail.com>:

>
>
>
> > How to prepend anything to a logging message? Is possible to do it
> > from the dictionary object (ExtraLog) or is there is that override
> > process() [1]?
>
> > ------------------
> > class ExtraLog(object):
>
> >    def __getitem__(self, name):
> >        if name == 'foo':
> >            result = 'testing'
> >        return result
>
> >    def __iter__(self):
> >        keys = ['foo',]
> >        keys.extend(self.__dict__.keys())
> >        return iter(keys)
>
> > logger = logging.LoggerAdapter(logging.getLogger('foo'), ExtraLog())
> > ------------------
>
> Yep. Just subclass LoggerAdapter and override process(..)

> Read this:http://docs.python.org/library/logging.html#adding-contextual-informa...

> --
> Regards
> Ishwor Gurung
> Key id:0xa98db35e
> Key fingerprint:FBEF 0D69 6DE1 C72B A5A8  35FE 5A9B F3BB 4E5E 17B5

Any example to override process() ?

[Peter Otten]

Joan Miller wrote:

> How to prepend anything to a logging message? Is possible to do it
> from the dictionary object (ExtraLog) or is there is that override
> process() [1]?
>
> ------------------
> class ExtraLog(object):
>
> def __getitem__(self, name):
> if name == 'foo':
> result = 'testing'
> return result
>
> def __iter__(self):
> keys = ['foo',]
> keys.extend(self.__dict__.keys())
> return iter(keys)

format = "foo=%(foo)s " + logging.BASIC_FORMAT
logging.basicConfig(format=format)

logger = logging.LoggerAdapter(logging.getLogger('foo'), ExtraLog())

logger.error("yadda")

Is that what you want?

Peter

[Joan Miller]

I want that a message can be modified before of being logged. i.e. for
"yadda" I would that were preppend 2 spaces. (And I want not manage
that in the format to manage the indentation of all text)

[Peter Otten]

Joan Miller wrote:

Following Ishwor's advice:

import logging

class MyLoggerAdapter(logging.LoggerAdapter):
def process(self, msg, kwargs):
return "message->" + msg.upper(), kwargs

logging.basicConfig()
logger = MyLoggerAdapter(logging.getLogger('foo'), {})
logger.error("yadda")

Peter

[Joan Miller]

Thanks!

I had to see the code to override it correctly [1]

--------------------
class LoggerAdapter_(logging.LoggerAdapter):

def __init__(self, logger, extra):
self.logger = logger
self.extra = extra

def process(self, msg, kwargs):
kwargs["extra"] = self.extra

return "message->" + msg.upper(), kwargs

--------------------

[1] http://bitbucket.org/mirror/python-trunk/src/tip/Lib/logging/__init__.py#cl-1264

[Joan Miller]

> [1]http://bitbucket.org/mirror/python-trunk/src/tip/Lib/logging/__init__...

Sorry! It isn't necessary to copy __init__().