traceback

Is there a simple way to disable the logging of an exception stack trace in Python 3, either in a Handler or Formatter ? I need the stack trace in another Handler , so setting exc_info=False , in the call to the Logger is not an option. Is there a simpler way than just defining my own Formatter ? The easiest option to disable per handler traceback output is to add a custom logging.Filter subclass that alters the record object (rather than filter out records). The filter simply has to set exc_info on records to None : class TracebackInfoFilter(logging.Filter): """Clear or restore the exception

Python 3 has the neat try: raise OneException('sorry') except OneException as e: # after a failed attempt of mitigation: raise AnotherException('I give up') from e syntax which allows raising a followup exception without loosing context. The best analogy I could come up with in Python 2 is raise AnotherException((e,'I give up')), None, sys.exc_info()[2] where the (e,'') is an ugly hack to have the original exception's name included in the message. But isn't there a better way? There's a raise_from in python-future ; simply install it pip install future and import to use from future.utils

I've since found a work around, but still want to know the answer. The traceback holds references to the stack frames of each function/method that was called on the current thread, from the topmost-frame on down to the point where the error was raised. Each stack frame also holds references to the local and global variables in effect at the time each function in the stack was called. Since there is no way for pickle to know what to serialize and what to ignore, if you were able to pickle a traceback you'd end up pickling a moving snapshot of the entire application state: as pickle runs, other

I have a code which, at some point shows a warning, I think that it is having a problem calculating a mean() I would like to know if there is any way to force python to tell me where, or which line, or whatever more information than just this message: C:\Python27\lib\site-packages\numpy\core\_methods.py:55: RuntimeWarning: Mean of empty slice. warnings.warn("Mean of empty slice.", RuntimeWarning) C:\Python27\lib\site-packages\numpy\core\_methods.py:79: RuntimeWarning: Degrees of freedom <= 0 for slice warnings.warn("Degrees of freedom <= 0 for slice", RuntimeWarning) I do not know if it is

I have logging function as follows. logging.basicConfig( filename = fileName, format = "%(levelname) -10s %(asctime)s %(message)s", level = logging.DEBUG ) def printinfo(string): if DEBUG: logging.info(string) def printerror(string): if DEBUG: logging.error(string) print string I need to login the line number, stack information. For example: 1: def hello(): 2: goodbye() 3: 4: def goodbye(): 5: printinfo() ---> Line 5: goodbye()/hello() How can I do this with Python? SOLVED def printinfo(string): if DEBUG: frame = inspect.currentframe() stack_trace = traceback.format_stack(frame) logging.debug