traceback.format_exc(err) doesn't work in python3

[jhultgre]

The calls when logging exceptions that use format_exc(err) don't work in python3

format_exc only takes a limit and chain arguments
https://docs.python.org/3/library/traceback.html?highlight=format_exc#traceback.format_exc

I'm getting errors like these

  File "Z:\tools\shotgun\shotgunEvents\shotgunEventDaemon.py", line 586, in _saveEventIdData
    traceback.format_exc(err),
  File "C:\Program Files\Python37\lib\traceback.py", line 167, in format_exc
    return "".join(format_exception(*sys.exc_info(), limit=limit, chain=chain))
  File "C:\Program Files\Python37\lib\traceback.py", line 121, in format_exception
    type(value), value, tb, limit=limit).format(chain=chain))
  File "C:\Program Files\Python37\lib\traceback.py", line 508, in __init__
    capture_locals=capture_locals)
  File "C:\Program Files\Python37\lib\traceback.py", line 337, in extract
    if limit >= 0:
TypeError: '>=' not supported between instances of 'FileNotFoundError' and 'int' 

python 2 doesn't seem to care about this.

[monomon]

format_exc never took an exception instance as argument. Python 2 perhaps just ignored the argument.