On Fri, 23 Dec 2005 16:23:57 +0100, Gregor Horvath <[EMAIL PROTECTED]> wrote:
>Hi,
>
>Is there a possibility to format a log message to give the function name
>where the log appears?
>
>Example
>
>import logging
>
>def aTestFunction():
> logger.debug("This is a message")
>
>The log should read:
>
>aTestFunction This is a message.
>
>There is a possibilty to format the module namewith %(module)s, but I
>did not find one for the function name.
>
>Is there a possibilty or can I create it myself?
>How can I determine the function name within a function?
>Introspection?
>
There's not a nice way that I know of, but you can do something like
>>> import sys
>>> def foo():
... print 'logger string containing function name
"%s"'%sys._getframe().f_code.co_name
...
>>> foo()
logger string containing function name "foo"
However, you might want to consider using a decorator that could
wrap a function if debugging and leave it alone otherwise. Also you
can log before and after calling the function. E.g.,
>>> def debugdeco(f):
... if not __debug__: return f
... def wrap(*args, **kw):
... print 'before entering function "%s" ...'%f.func_name
... result = f(*args, **kw)
... print 'after returning from function "%s" ...'%f.func_name
... return result
... wrap.func_name = f.func_name # make it look the same if desired
... return wrap
...
>>> @debugdeco
... def foo(something): print something; return 'whatever'
...
>>> foo('hello')
before entering function "foo" ...
hello
after returning from function "foo" ...
'whatever'
>>> __debug__ = False
File "<stdin>", line 1
SyntaxError: can not assign to __debug__
Oops, can't experiment that way ;-)
>>> ^Z
We'll just start it with -O to set __debug__ False:
[ 8:45] E:\Info\Politics>py24 -O
Python 2.4b1 (#56, Nov 3 2004, 01:47:27)
[GCC 3.2.3 (mingw special 20030504-1)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> def debugdeco(f):
... if not __debug__: return f
... def wrap(*args, **kw):
... print 'before entering function "%s" ...'%f.func_name
... result = f(*args, **kw)
... print 'after returning from function "%s" ...'%f.func_name
... return result
... wrap.func_name = f.func_name # make it look the same if desired
... return wrap
...
>>> @debugdeco
... def foo(something): print something; return 'whatever'
...
>>> foo('hello')
hello
'whatever'
You could still do stuff unconditionally of course, and also inside foo.
Regards,
Bengt Richter
--
http://mail.python.org/mailman/listinfo/python-list
