I have a Python script that imports a utility script. Both scripts use logging,
but the logs don't work as advertised. I'm getting logging output from the
utility script but none from the main file. Worse, the format of the utility
script's logs don't match anything I define.
The utility script is called xlreader.py. It has the following lines:
-- begin snippet --
import logging
XLOGGER = logging.getLogger('XLREADER')
-- end snippet --
And it calls XLOGGER.debug(), XLOGGER.error() and XLOGGER.info() but it never
defines a handler.
The main script imports xlreader but does not reference XLOGGER. It defines its
own logger:
-- begin snippet --
import logging
import xlreader
LOG = logging.getLogger('SHIPPING')
FORMAT = '%(asctime)-15s %(name)s %(level)-8s %(message)s'
logging.basicConfig(format=FORMAT,level=logging.DEBUG)
handler = logging.StreamHandler()
formatter = logging.Formatter(FORMAT)
handler.setFormatter(formatter)
LOG.addHandler(handler)
-- end snippet --
I added the logging.basicConfig line but it didn't have any effect. I created
the second handler separately.
When I run the scriptI get logging information from only xlreader, not from the
main script:
DEBUG:XLREADER:Creating Excel Reader
This format isn't defined anywhere. T
Even more mysterious, after I run the file (in an IDE so I have a REPL
afterwards), I have:
>>> XLOGGER
>>> <logging.Logger at 0x981a208>
>>> XLOGGER.handlers
>>> []
>>> XLOGGER.debug('test')
>>> DEBUG:XLREADER:test
>>> LOG.handlers
>>> [<logging.StreamHandler at 0x97e3c88>, <logging.StreamHandler at 0xb2954e0>]
>>> [h.formatter._fmt for h in LOG.handlers]
>>> ['%(asctime)-15s %(name)s %(level)-8s %(message)s',
'%(asctime)-15s %(name)s %(level)-8s %(message)s']
How can I track where this formatting is coming from?
Josh
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