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Diffstat (limited to 'sleekxmpp/thirdparty/statemachine.py')
-rw-r--r--sleekxmpp/thirdparty/statemachine.py15
1 files changed, 12 insertions, 3 deletions
diff --git a/sleekxmpp/thirdparty/statemachine.py b/sleekxmpp/thirdparty/statemachine.py
index 4b5ecd6b..6c504dce 100644
--- a/sleekxmpp/thirdparty/statemachine.py
+++ b/sleekxmpp/thirdparty/statemachine.py
@@ -15,7 +15,8 @@ log = logging.getLogger(__name__)
class StateMachine(object):
- def __init__(self, states=[]):
+ def __init__(self, states=None):
+ if not states: states = []
self.lock = threading.Condition()
self.__states = []
self.addStates(states)
@@ -33,7 +34,7 @@ class StateMachine(object):
self.lock.release()
- def transition(self, from_state, to_state, wait=0.0, func=None, args=[], kwargs={}):
+ def transition(self, from_state, to_state, wait=0.0, func=None, args=None, kwargs=None):
'''
Transition from the given `from_state` to the given `to_state`.
This method will return `True` if the state machine is now in `to_state`. It
@@ -64,15 +65,23 @@ class StateMachine(object):
values for `args` and `kwargs` are provided, they are expanded and passed like so:
`func( *args, **kwargs )`.
'''
+ if not args:
+ args = []
+ if not kwargs:
+ kwargs = {}
return self.transition_any((from_state,), to_state, wait=wait,
func=func, args=args, kwargs=kwargs)
- def transition_any(self, from_states, to_state, wait=0.0, func=None, args=[], kwargs={}):
+ def transition_any(self, from_states, to_state, wait=0.0, func=None, args=None, kwargs=None):
'''
Transition from any of the given `from_states` to the given `to_state`.
'''
+ if not args:
+ args = []
+ if not kwargs:
+ kwargs = {}
if not isinstance(from_states, (tuple, list, set)):
raise ValueError("from_states should be a list, tuple, or set")