log error messages in python using logging code example
Example 1: logging.logger
import logging
logging.basicConfig(level=logging.WARNING)
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)
logger.debug("some debugging...")
logger.error("some error...")
Example 2: pythong logging logger to string
import logging
try:
from cStringIO import StringIO # Python 2
except ImportError:
from io import StringIO
class LevelFilter(logging.Filter):
def __init__(self, levels):
self.levels = levels
def filter(self, record):
return record.levelno in self.levels
log_stream = StringIO()
logging.basicConfig(stream=log_stream, level=logging.NOTSET)
logging.getLogger().addFilter(LevelFilter((logging.INFO, logging.WARNING, logging.ERROR)))
logging.info('hello world')
logging.warning('be careful!')
logging.debug("you won't see this")
logging.error('you will see this')
logging.critical('critical is no longer logged!')
print(log_stream.getvalue())