Use Python 3 style qualified exception names in tracebacks

[Martin Packman]

Originally as part of my unicode traceback work I had the module name included when printing exceptions, as Python 3 does. However it broke a few tests, and wasn't really a requirement to get non-ascii tracebacks working so I removed that logic. Putting it back in would be particularly useful for things called 'error', is that socket.error or pywintypes.error or...?

[Jonathan Lange (jml)]

Can you give an example of socket.error being displayed without the "socket." bit?

[Martin Packman (gz)]

Python 2.7.0+ (trunk, Oct 25 2010, 18:06:24) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import socket, traceback
>>> traceback.format_exception_only(socket.error, socket.error("fish"))
['error: fish\n']

Python 3.2a3+ (py3k, Oct 25 2010, 17:22:39) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import socket, traceback
>>> traceback.format_exception_only(socket.error, socket.error("fish"))
['socket.error: fish\n']

The testtools code does basically the same thing the Python 2 code does.

[Robert Collins (lifeless)]

I'd love to see this fixed with a helper - Raises and MatchesException want the same facility.

[Robert Collins (lifeless)]

Fixed by using traceback2.