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
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