Question about raise and exceptions.

[Steven W. Orr]

In my class I have

     class Error(Exception):
         """Base class for exceptions in this module."""
         pass

     class TransitionError(Error):
         """Raised when an operation attempts a state transition that's not
         allowed.

         Attributes:
             previous -- state at beginning of transition
             next -- attempted new state
             message -- explanation of why the specific transition is not allowed
         """

         def __init__(self, previous, next, message):
             self.previous = previous
             self.next = next
             self.message = message

Also in my class I check to see if a transition is legal or not:

             newstate = self.fsm[self.curr_state][self._ev]
             if newstate == self.error_state:
                 raise TransitionError, self.curr_state, newstate, \
"Going to error state %d from state %d" % (self.curr_state, newstate)
             self.curr_state    = self.fsm[newstate][self._ev]

When I run it I get this:

884 > ./t_fsm.py
Traceback (most recent call last):
   File "./t_fsm.py", line 3, in ?
     from fsm import *
   File "/home/boston/VIASAT/sorr/py/fsm/fsm.py", line 76
     raise TransitionError, self.curr_state, newstate, "Going to error 
state %d from state %d" % (self.curr_state, newstate)
                                                     ^
SyntaxError: invalid syntax

(The carat is really under the comma before "Going.)

I hate to bother people with syntax problems, but I have no idea what to 
do. Sorry.

TIA :-(

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