kython.klogging

- move to core
- add a proper description why it's useful
- make default level INFO
- use HPI_LOGS variable for easier log level control (abdc6df1ea)

my/kython/klogging.py

@@ -1,65 +0,0 @@
-#!/usr/bin/env python3
-import logging
-from typing import Union, Optional
-
-Level = int
-LevelIsh = Optional[Union[Level, str]]
-
-
-def mklevel(level: LevelIsh) -> Level:
-    if level is None:
-        return logging.NOTSET
-    if isinstance(level, int):
-        return level
-    return getattr(logging, level.upper())
-
-
-_FMT = '{start}[%(levelname)-7s %(asctime)s %(name)s %(filename)s:%(lineno)d]{end} %(message)s'
-_FMT_COLOR   = _FMT.format(start='%(color)s', end='%(end_color)s')
-_FMT_NOCOLOR = _FMT.format(start='', end='')
-
-
-def setup_logger(logger: logging.Logger, level: LevelIsh) -> None:
-    lvl = mklevel(level)
-    try:
-        import logzero # type: ignore
-    except ModuleNotFoundError:
-        import warnings
-        warnings.warn("You might want to install 'logzero' for nice colored logs!")
-        logger.setLevel(lvl)
-        h = logging.StreamHandler()
-        h.setLevel(lvl)
-        h.setFormatter(logging.Formatter(fmt=_FMT_NOCOLOR))
-        logger.addHandler(h)
-    else:
-        formatter = logzero.LogFormatter(
-            fmt=_FMT_COLOR,
-            datefmt=None, # pass None to prevent logzero from messing with date format
-        )
-        logzero.setup_logger(logger.name, level=lvl, formatter=formatter)
-
-
-class LazyLogger(logging.Logger):
-    def __new__(cls, name, level: LevelIsh = 'DEBUG'):
-        logger = logging.getLogger(name)
-        # this is called prior to all _log calls so makes sense to do it here?
-        def isEnabledFor_lazyinit(*args, logger=logger, orig=logger.isEnabledFor, **kwargs):
-            att = 'lazylogger_init_done'
-            if not getattr(logger, att, False): # init once, if necessary
-                setup_logger(logger, level=level)
-                setattr(logger, att, True)
-            return orig(*args, **kwargs)
-
-        logger.isEnabledFor = isEnabledFor_lazyinit  # type: ignore[assignment]
-        return logger
-
-
-def test():
-    ll = LazyLogger('test')
-    ll.debug('THIS IS DEBUG')
-    ll.warning('THIS IS WARNING')
-    ll.exception(RuntimeError("oops"))
-
-
-if __name__ == '__main__':
-    test()