Catching exceptions on doctest

doctest exceptions

#Testing expected exceptions

>>> from exceptions import UserError
>>> try:
  ...     someOperation()
  ... except UserError as e:
  ...     e.message
  u'ExpectedMessage'
  >>> # continue test


#Debugging  

>>> try:
  ...     someOperation()
  ... except:
  ...     import pdb; pdb.set_trace()
  >>> # continue as normal