Showing the method's class in expection's traceback

[Gabriel Genellina]

En Mon, 19 May 2008 10:54:05 -0300, Agustin Villena  
<agustin.villena at gmail.com> escribió:
> On May 18, 4:31 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> Agustin Villena schrieb:
>>
>> > is there anyway to show the class of amethodin an exception's
>> > traceback?
>> > I want to improve the line
>> > File "G:\dev\exceptions\sample.py", line 3, in foo
>> > to
>> > File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>>
>> It should be. You can get a dictionary of the locals of an exception
>> stack frame, of which you could extract the self-parameter's class.
>
> I digged on sys.exc_info() object and the traceback module and I
> could't figure how I can get the locals() of the exception stackframe

Put this function in traceback.py, and replace the lines
         name = co.co_name
with
         name = guess_full_method_name(f)
everywhere.
Please read the docstring!!!

def guess_full_method_name(frame):
     """Guess classname.methodname for a given frame.

     Only a guess!
     Assumes the frame belongs to an instancemethod
     whose first argument is "self", or a classmethod
     whose first argument is "cls".
     Doesn't handle correctly any other situation.
     Returns the class name of the object on which
     the method was called, not the class where
     the method was actually defined.
     """
     cls_name = None
     fun_name = frame.f_code.co_name
     self = frame.f_locals.get('self', None)
     if self is None:
         cls = frame.f_locals.get('cls', None)
     else:
         cls = getattr(self, '__class__', None)
     if cls is not None:
         cls_name = getattr(cls, '__name__', None)
         if cls_name is not None:
             return '%s.%s' % (cls_name, fun_name)
     return fun_name

-- 
Gabriel Genellina