Gregor Kopka <mailfrom-bugs.python....@kopka.net> added the comment:
I ran into this shortly but was able to overcome it by patching
/Lib/logging/__init__.py:
43-44:
import threading
+ import multiprocessing
except ImportError:
270-271:
self.process = os.getpid()
+ self.processName = multiprocessing.current_process()._name
else:
(and some info about %(processName)s into the docstring) to make it
usable for me.
After that the following works like intended:
import multiprocessing
import logging
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s
%(processName)s %(threadName)s %(levelname)s %(message)s')
# omit next line to get only what your code is logging
logger = multiprocessing.get_logger()
def f():
logging.info('info from subprocess')
if __name__ == '__main__':
logging.info('info from main process')
p = multiprocessing.Process(target=f)
p.start()
p.join()
Surely no perfect solution, but the monkey-patching in
multiprocessing.util._check_logger_class() dosn't seem to do the trick.
Other option is to not use %(processName)s in logging format, but
%(process)s instead - then it works without patching the logging module
(but you get numeric process IDs):
import multiprocessing
import logging
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s %(process)s
%(threadName)s %(levelname)s %(message)s')
# omit next line to get only what your code is logging
logger = multiprocessing.get_logger()
def f():
logging.info('info from subprocess')
if __name__ == '__main__':
logging.info('info from main process')
p = multiprocessing.Process(target=f)
p.start()
p.join()
2009-01-05 23:48:02,046 4000 MainThread INFO info from main process
2009-01-05 23:48:02,187 3968 MainThread INFO child process calling
self.run()
2009-01-05 23:48:02,187 3968 MainThread INFO info from subprocess
2009-01-05 23:48:02,187 3968 MainThread INFO process shutting down
2009-01-05 23:48:02,187 3968 MainThread DEBUG running all "atexit"
finalizers with priority >= 0
2009-01-05 23:48:02,187 3968 MainThread DEBUG running the remaining
"atexit" finalizers
2009-01-05 23:48:02,203 3968 MainThread INFO process exiting with
exitcode 0
2009-01-05 23:48:02,203 4000 Dummy-1 INFO process shutting down
2009-01-05 23:48:02,203 4000 Dummy-1 DEBUG running all "atexit"
finalizers with priority >= 0
2009-01-05 23:48:02,203 4000 Dummy-1 DEBUG running the remaining
"atexit" finalizers
----------
nosy: +Gregor_Kopka
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue4301>
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