logging.StreamHandler is not the best way to log to console .. as it prints everything to sys.stderr by default. You can configure it to log to sys.stdout .. but that means even error/exception will be printed to sys.stdout.
Python, 30 lines
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Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | class ConsoleHandler(logging.StreamHandler):
"""A handler that logs to console in the sensible way.
StreamHandler can log to *one of* sys.stdout or sys.stderr.
It is more sensible to log to sys.stdout by default with only error
(logging.ERROR and above) messages going to sys.stderr. This is how
ConsoleHandler behaves.
"""
def __init__(self):
logging.StreamHandler.__init__(self)
self.stream = None # reset it; we are not going to use it anyway
def emit(self, record):
if record.levelno >= logging.ERROR:
self.__emit(record, sys.stderr)
else:
self.__emit(record, sys.stdout)
def __emit(self, record, strm):
self.stream = strm
logging.StreamHandler.emit(self, record)
def flush(self):
# Workaround a bug in logging module
# See:
# http://bugs.python.org/issue6333
if self.stream and hasattr(self.stream, 'flush') and not self.stream.closed:
logging.StreamHandler.flush(self)
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Tags: logging
