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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steveo at syslang.net
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