`sys.last_type' is missing and thus, traceback.print_last() is not working.

$ python
Python 2.6.1 (r261:67515, Dec  7 2008, 18:56:39) 
[GCC 4.3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.

>>> import sys
>>> try: raise Exception('asdf')
... except: print sys.last_type
... 
Traceback (most recent call last):
  File "<stdin>", line 4, in <module>
AttributeError: 'module' object has no attribute 'last_type'

>>> import traceback
>>> try: raise Exception('asdf')
... except: traceback.print_last()
... 
Traceback (most recent call last):
  File "<stdin>", line 4, in <module>
AttributeError: 'module' object has no attribute 'last_type'

Fixed in r70552.

Is the fix really correct? The documentation clearly states about
`sys.last_type`: "These three variables are not always defined; they are set
when an exception is not handled and the interpreter prints an error
message and a stack traceback." And there is already
`traceback.print_exc()`, which is a shorthand for
"print_exception(sys.exc_type, sys.exc_value, sys.exc_traceback, limit,
file)". So, in my opinion, the previous behaviour was intended behaviour,
and the OP needs to use `traceback.print_exc()`.

Trundle, you are correct. Reverted in r697553.