Let's say I got this logging.logger instance:
import logging
logger = logging.getLogger('root')
FORMAT = "[%(filename)s:%(lineno)s - %(funcName)20s() ] %(message)s"
logging.basicConfig(format=FORMAT)
logger.setLevel(logging.DEBUG)
Problem comes when I try to use it like the builtin print with a dynamic number of arguments:
>>> logger.__class__
<class 'logging.Logger'>
>>> logger.debug("hello")
[<stdin>:1 - <module>() ] hello
>>> logger.debug("hello","world")
Traceback (most recent call last):
File "c:\Python2711\Lib\logging\__init__.py", line 853, in emit
msg = self.format(record)
File "c:\Python2711\Lib\logging\__init__.py", line 726, in format
return fmt.format(record)
File "c:\Python2711\Lib\logging\__init__.py", line 465, in format
record.message = record.getMessage()
File "c:\Python2711\Lib\logging\__init__.py", line 329, in getMessage
msg = msg % self.args
TypeError: not all arguments converted during string formatting
Logged from file <stdin>, line 1
How could i emulate the print behaviour still using logging.Logger?
Wrapper based on @Jim's original answer:
import logging
import sys
_logger = logging.getLogger('root')
FORMAT = "[%(filename)s:%(lineno)s - %(funcName)20s() ] %(message)s"
logging.basicConfig(format=FORMAT)
_logger.setLevel(logging.DEBUG)
class LogWrapper():
def __init__(self, logger):
self.logger = logger
def info(self, *args, sep=' '):
self.logger.info(sep.join("{}".format(a) for a in args))
def debug(self, *args, sep=' '):
self.logger.debug(sep.join("{}".format(a) for a in args))
def warning(self, *args, sep=' '):
self.logger.warning(sep.join("{}".format(a) for a in args))
def error(self, *args, sep=' '):
self.logger.error(sep.join("{}".format(a) for a in args))
def critical(self, *args, sep=' '):
self.logger.critical(sep.join("{}".format(a) for a in args))
def exception(self, *args, sep=' '):
self.logger.exception(sep.join("{}".format(a) for a in args))
def log(self, *args, sep=' '):
self.logger.log(sep.join("{}".format(a) for a in args))
logger = LogWrapper(_logger)
Alternatively, define a function that accepts *args
and then join
them in your call to logger
:
def log(*args, logtype='debug', sep=' '):
getattr(logger, logtype)(sep.join(str(a) for a in args))
I added a logtype
for flexibility here but you could remove it if not required.
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