[issue14031] logging module cannot format str.format log messages

[Guido Kollerie]

New submission from Guido Kollerie :

When logging messages with variable data one typically writes:

username = 'Guido'
logging.info('User %s logged in', username)

However Python 3 has support str.format (PEP 3101). If one has adopted 
str.format for formatting strings in Python 3 code one should also be able to 
write the above as:

logging.info('User {} logged in', username)

However this currently is not supported. For backwards compatibility,% style 
logging should remain the default. However when a logger is configured using:

import logging
logging.basicConfig(style='{', format='{levelname}:{message}')

all subsequent calls to logging.debug, logging.info, logging.warning, 
logging.error, logging.critical, logging.exception and logging.log should use 
str.format for formatting.

--
messages: 153481
nosy: gkoller
priority: normal
severity: normal
status: open
title: logging module cannot format str.format log messages
type: enhancement
versions: Python 3.2

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[issue14031] logging module cannot format str.format log messages

[Guido Kollerie]

Guido Kollerie  added the comment:

I see, could this be made to work if I explicitly request a logger instead?:

logger = logging.getLogger('my_logger', style='{')
logger.info('User {} logged in', username)

Maybe even for the root logger:

root_logger = logging.getLogger(style='{')
root_logger.info('User {} logged in', username)

--

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