Format placeholders

[JokerQyou]

I read through the documentation site but did not find a single line of code mentioning about string format. So I assumed the basic concepts are the same. But when I go ahead and try it, things does not work as expected:

Python 3.6.5 (default, Mar 30 2018, 06:42:10)
[GCC 4.2.1 Compatible Apple LLVM 9.0.0 (clang-900.0.39.2)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import logging, sys, logbook
>>> logging.basicConfig(level=logging.DEBUG, stream=sys.stdout)
>>> logging.debug('Hi %s', 'world')
DEBUG:root:Hi world
>>> logbook.StreamHandler(sys.stdout).push_application()
>>> logbook.debug('Hi %s', 'world')
[2018-06-09 13:01:12.360139] DEBUG: Generic: Hi %s
>>> logbook.__version__
'1.4.0'
>>> logbook.debug('Hi {}', 'world')
[2018-06-09 13:02:14.765765] DEBUG: Generic: Hi world
>>>

It seems like logbook does not support string format placeholders %s, %d, etc., while the stdlib logging does. It's this an intended behavior? If so, would it make sense to document this difference so people coming from logging could adjust their expectation?

[vmalloc]

@JokerQyou Logbook uses new-style formatting:

logger.debug("Message is {}", "message")

The code you attached is using logging redirect, which is mostly an interoperability feature to make sure built-in logging logs will make their way into logbook. If you use Logbook, your own code should emit logs using logbook loggers and not logging ones...

[wsw70]

@vmalloc I think the question was also about the available formatting attributes (?) If so I opened a similar issue (#276)