On Wed, Jul 23, 2014 at 5:14 PM, Steven D'Aprano <st...@pearwood.info> wrote:
> Error in sys.excepthook:
> Traceback (most recent call last):
> File "/home/steve/mylogging.py", line 28, in my_error_handler
> mylogger.exception(msg)
> AttributeError: 'NoneType' object has no attribute 'exception'
>
> Original exception was:
> Traceback (most recent call last):
> [...]
> File "/home/steve/mylogging.py", line 35, in <module>
> foo
> NameError: name 'foo' is not defined
I was not able to repro this with the 3.5-messy that I have on this
system, nor a clean 3.4.1 from Debian Jessie. It's slightly different:
rosuav@dewey:~$ python3 mylogging.py
Error in sys.excepthook:
Traceback (most recent call last):
File "/usr/lib/python3.4/logging/__init__.py", line 846, in handle
self.emit(record)
File "/usr/lib/python3.4/logging/handlers.py", line 881, in emit
msg = self.format(record)
File "/usr/lib/python3.4/logging/__init__.py", line 821, in format
return fmt.format(record)
File "/usr/lib/python3.4/logging/__init__.py", line 566, in format
record.exc_text = self.formatException(record.exc_info)
File "/usr/lib/python3.4/logging/__init__.py", line 516, in formatException
traceback.print_exception(ei[0], ei[1], tb, None, sio)
File "/usr/lib/python3.4/traceback.py", line 169, in print_exception
for line in _format_exception_iter(etype, value, tb, limit, chain):
File "/usr/lib/python3.4/traceback.py", line 146, in _format_exception_iter
for value, tb in values:
File "/usr/lib/python3.4/traceback.py", line 125, in _iter_chain
context = exc.__context__
AttributeError: 'NoneType' object has no attribute '__context__'
Original exception was:
Traceback (most recent call last):
File "mylogging.py", line 24, in <module>
foo # Die with uncaught NameError.
NameError: name 'foo' is not defined
(Obviously that's the clean 3.4, but it's the same exception in 3.5.)
>From what I can see, the problem is that sys.exc_info() is returning
None, None, None at this point, and the Logger.exception() method
specifically looks for the currently-being-handled exception. You can
get equivalent functionality with this:
def my_error_handler(type, value, tb):
msg = "Uncaught %s: %s" % (type, value)
mylogger.error(msg, exc_info=(type, value, tb))
sys.__excepthook__(type, value, tb) # print the traceback to stderr
At least, I think that's correct. It does seem to dump a lot of stuff
into a single line in the log, though.
Can't repro your exact traceback, though, so I don't know what's going on there.
ChrisA
--
https://mail.python.org/mailman/listinfo/python-list
