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56d74b6 | 1 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 31 32 33 34 35 36 37 38 39 40 | import logging
from six import PY3
# Additional log methods
def logger_has_handlers(logger):
"""Since Python 2 doesn't provide Logger.hasHandlers(), we have to
perform the lookup by ourself."""
if PY3:
return logger.hasHandlers()
else:
c = logger
rv = False
while c:
if c.handlers:
rv = True
break
if not c.propagate:
break
else:
c = c.parent
return rv
def get_default_logger(name):
"""Get a logger from default logging manager. If no handler
is associated, add a default NullHandler"""
logger = logging.getLogger(name)
if not logger_has_handlers(logger):
# If logging is not configured in the current project, configure
# this logger to discard all logs messages. This will prevent
# the 'No handlers could be found for logger XXX' error on Python 2,
# and avoid redirecting errors to the default 'lastResort'
# StreamHandler on Python 3
logger.addHandler(logging.NullHandler())
return logger
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