Am 11.03.2010 12:14, schrieb Peter Otten:
Hellmut Weber wrote:
Logging works very well giving the filename and line number of the point
where it is called. As long as I use the loggers directly.
BUT when I have to wrap the logger call in some other function, I always
get file name and line number of the call of the logger inside the
wrapping function.
Is there a possibility to get this information in this situation too?
The official way is probably to write a custom Logger class that overrides
the findCaller() method.
Below is a hack that monkey-patches the logging._srcfile attribute to ignore
user-specified modules in the call stack:
$ cat wrapper.py
import logging
import os
import sys
logger = logging.getLogger()
class SrcFile(object):
def __init__(self, exclude_files):
self.files = set(exclude_files)
def __eq__(self, other):
return other in self.files
def fixname(filename):
if filename.lower().endswith((".pyc", ".pyo")):
filename = filename[:-4] + ".py"
return os.path.normcase(filename)
if "--monkey" in sys.argv:
print "patching"
logging._srcfile = SrcFile([logging._srcfile, fixname(__file__)])
def warn(*args, **kw):
logger.warn(*args, **kw)
$ cat main.py
import logging
logging.basicConfig(format="%(filename)s<%(lineno)s>: %(message)s")
import wrapper
wrapper.warn("foo")
wrapper.warn("bar")
wrapper.warn("baz")
$ python main.py
wrapper.py<23>: foo
wrapper.py<23>: bar
wrapper.py<23>: baz
$ python main.py --monkey
patching
main.py<4>: foo
main.py<5>: bar
main.py<6>: baz
$ python -V
Python 2.6.4
Peter
Hi Peter,
your hack is exactly what I was looking for.
It permits to configure my logging messages as I want, e.g. using
different colors for different classes of messages.
I do not yet understand all details WHY it is working but suppose some
study of the logging module will help me to understand.
Thank you very much
--
Dr. Hellmut Weber m...@hellmutweber.de
Degenfeldstraße 2 tel +49-89-3081172
D-80803 München-Schwabing mobil +49-172-8450321
please: No DOCs, no PPTs. why: tinyurl.com/cbgq
--
http://mail.python.org/mailman/listinfo/python-list
