python 2.7 - Not able to get running the timeout mechanism shown in https://github.com/tyarkoni/transitions/issues/198. -

need help.

trying put in place timeout functionality state machine mentioned here transitions library. on init of machine keep receiving:

typeerror: init() got unexpected keyword argument 'parent'

although cunstructor parameters propagated.

my code(python 2.7.6/ipython 5.1.0):

from transitions.extensions import hierarchicalmachine machine  import time threading import thread transitions import state   class timeout(thread):      def __init__(self, func, timeout):         super(timeout, self).__init__()         self.func = func         self.timeout = timeout         self.canceled = false         print 'starting countdown'         self.start()      def run(self):         time.sleep(self.timeout)         print 'timeout occurred'         if not self.canceled:             self.func()   class timeoutstate(state):      def __init__(self, name, timeout=none,  *args, **kwargs):         self.timeout = timeout          super(timeoutstate, self).__init__(name=name, *args, **kwargs)    class timeoutmachine(machine):      def __init__(self, model, states, transitions, initial, title):          super(machine, self).__init__(  model=model,                                          states=states,                                           transitions=transitions,                                           initial=initial,                                          name=title,                                          queued=true,                                           auto_transitions=true,                                           send_event=true)       def _create_state(self, *args, **kwargs):         return timeoutstate(*args, **kwargs)    class model():      def __init__(self):         self.timer = none      def set_timeout(self, event_data):         timeout=event_data.kwargs.pop('timeout',3)         self.timer = timeout(self.dotimeout, timeout)   model = model() transitions = [{'dotimeout', 'b', 'c'}] b = timeoutstate(name='b',timeout=5,  on_enter='set_timeout') machine = timeoutmachine(model=model, states=['a', b, 'c'],                           transitions=transitions, initial='a',                           title='testmachinewithtimeouts') 

error stack:

traceback (most recent call last):   file "/usr/local/lib/python2.7/dist-packages/ipython/core/interactiveshell.py", line 2881, in run_code     exec(code_obj, self.user_global_ns, self.user_ns)   file "<ipython-input-40-747d39e2dc66>", line 1, in <module>     t.timeoutmachine(model=model, states=['a', b, 'c'], transitions=transitions, initial='a', title='testmachinewithtimeouts')   file "/home/sge/workspace_neon/ocpp16j_dev/_test_.py", line 61, in __init__     send_event=true)   file "build/bdist.linux-i686/egg/transitions/core.py", line 364, in __init__     self.add_states(states)   file "build/bdist.linux-i686/egg/transitions/extensions/nesting.py", line 264, in add_states     new_states = self.traverse(states, *args, **kwargs)   file "build/bdist.linux-i686/egg/transitions/extensions/nesting.py", line 183, in traverse     ignore_invalid_triggers=ignore))   file "/home/sge/workspace_neon/ocpp16j_dev/_test_.py", line 78, in _create_state     return timeoutstate(*args, **kwargs)   file "/home/sge/workspace_neon/ocpp16j_dev/_test_.py", line 46, in __init__     super(timeoutstate, self).__init__(name=name, *args, **kwargs) typeerror: __init__() got unexpected keyword argument 'parent' 

what's wrong on it? clue?

thank you!

there (at least) 3 issues example:

• problem: hierarchicalmachine requires state of type transitions.extensions.nesting.nestedstate

  • solution: subclass correct state. easiest fix replace from transitions import state from transitions.extensions.nesting import nestedstate state

• problem: in timeoutmachine.__init__ call super base class instead of subclass. call __init__ method of base class of machine if there any.

  • solution: change super(machine, self).__init__ super(timeoutmachine, self).__init__

• problem: transition defined set transitions supports arrays or dictionaries purpose.

  • solution: change transitions = [{'dotimeout', 'b', 'c'}] either transitions=[['dotimeout', 'b', 'c']] or transitions=[{'trigger':'dotimeout', 'source':'b', 'dest':'c'}]

and 1 remark: since sublclass timeoutmachine , use timeoutstate default state, not have manually create states. define states instead: states = ['a', 'c', {'name': 'b', 'timeout': 5, 'on_enter': 'set_timeout'}]

working code:

from transitions.extensions import hierarchicalmachine machine import time threading import thread transitions.extensions.nesting import nestedstate state   class timeout(thread):      def __init__(self, func, timeout):         super(timeout, self).__init__()         self.func = func         self.timeout = timeout         self.canceled = false         print 'starting countdown'         self.start()      def run(self):         time.sleep(self.timeout)         print 'timeout occurred'         if not self.canceled:             self.func()   class timeoutstate(state):      def __init__(self, name, timeout=none,  *args, **kwargs):         self.timeout = timeout         super(timeoutstate, self).__init__(name=name, *args, **kwargs)   class timeoutmachine(machine):      def __init__(self, model, states, transitions, initial, title):         super(timeoutmachine, self).__init__(model=model,                                              states=states,                                              transitions=transitions,                                              initial=initial,                                              name=title,                                              queued=true,                                              auto_transitions=true,                                              send_event=true)      def _create_state(self, *args, **kwargs):         return timeoutstate(*args, **kwargs)   class model:      def __init__(self):         self.timer = none      def set_timeout(self, event_data):         timeout = event_data.kwargs.pop('timeout', 3)         self.timer = timeout(self.dotimeout, timeout)   model = model() transitions = [{'trigger': 'dotimeout', 'source':'b', 'dest':'c'}] states = ['a', 'c', {'name': 'b', 'timeout': 5, 'on_enter': 'set_timeout'}] machine = timeoutmachine(model=model, states=states,                          transitions=transitions, initial='a',                          title='testmachinewithtimeouts') model.to_b()