From: W. Trevor King Date: Sat, 21 Aug 2010 16:53:54 +0000 (-0400) Subject: Remove CommandStack.__getstate__ to avoid type ambiguity for command arguments. X-Git-Url: http://git.tremily.us/?p=hooke.git;a=commitdiff_plain;h=816713bbbb1a34d1975e608855af199bdab204d9 Remove CommandStack.__getstate__ to avoid type ambiguity for command arguments. --- diff --git a/hooke/command_stack.py b/hooke/command_stack.py index 234b3f3..6e84a91 100644 --- a/hooke/command_stack.py +++ b/hooke/command_stack.py @@ -39,7 +39,7 @@ class CommandStack (list): >>> c.append(CommandMessage('CommandB', {'param':'D'})) Implement a dummy :meth:`execute_command` for testing. - + >>> def execute_cmd(hooke, command_message, stack=None): ... cm = command_message ... print 'EXECUTE', cm.command, cm.arguments @@ -59,11 +59,10 @@ class CommandStack (list): >>> def filter(hooke, command_message): ... return command_message.command == 'CommandB' - >>> c.filter = filter Apply the stack to the current curve. - >>> c.execute(hooke=None) # doctest: +ELLIPSIS + >>> c.execute(hooke=None, filter=filter) # doctest: +ELLIPSIS EXECUTE CommandB {'param': 'B'} EXECUTE CommandB {'param': 'D'} @@ -80,19 +79,84 @@ class CommandStack (list): '', ''] - The data-type is also pickleable, to ensure we can move it between - processes with :class:`multiprocessing.Queue`\s and easily save it - to disk. + The data-type is also pickleable, which ensures we can move it + between processes with :class:`multiprocessing.Queue`\s and easily + save it to disk. We must remove the unpickleable dummy executor + before testing though. + + >>> c.execute_command # doctest: +ELLIPSIS + + >>> del(c.__dict__['execute_command']) + >>> c.execute_command # doctest: +ELLIPSIS + + + Lets also attach a child command message to demonstrate recursive + serialization (we can't append `c` itself because of + `Python issue 1062277`_). + + .. _Python issue 1062277: http://bugs.python.org/issue1062277 + + >>> import copy + >>> c.append(CommandMessage('CommandD', {'param': copy.deepcopy(c)})) + + Run the pickle (and YAML) tests. >>> import pickle >>> s = pickle.dumps(c) >>> z = pickle.loads(s) - >>> print [repr(cm) for cm in c] # doctest: +NORMALIZE_WHITESPACE - ['', - '', - '', - '', - ''] + >>> print '\\n'.join([repr(cm) for cm in c] + ... ) # doctest: +NORMALIZE_WHITESPACE, + + + + + + , + , + , + , + ]}> + >>> import yaml + >>> print yaml.dump(c) + !!python/object/new:hooke.command_stack.CommandStack + listitems: + - !!python/object:hooke.engine.CommandMessage + arguments: {param: A} + command: CommandA + - !!python/object:hooke.engine.CommandMessage + arguments: {param: B} + command: CommandB + - !!python/object:hooke.engine.CommandMessage + arguments: {param: C} + command: CommandA + - !!python/object:hooke.engine.CommandMessage + arguments: {param: D} + command: CommandB + - !!python/object:hooke.engine.CommandMessage + arguments: {param: E} + command: CommandC + - !!python/object:hooke.engine.CommandMessage + arguments: + param: !!python/object/new:hooke.command_stack.CommandStack + listitems: + - !!python/object:hooke.engine.CommandMessage + arguments: {param: A} + command: CommandA + - !!python/object:hooke.engine.CommandMessage + arguments: {param: B} + command: CommandB + - !!python/object:hooke.engine.CommandMessage + arguments: {param: C} + command: CommandA + - !!python/object:hooke.engine.CommandMessage + arguments: {param: D} + command: CommandB + - !!python/object:hooke.engine.CommandMessage + arguments: {param: E} + command: CommandC + command: CommandD + There is also a convenience function for clearing the stack. @@ -100,27 +164,17 @@ class CommandStack (list): >>> print [repr(cm) for cm in c] [] """ - def __getstate__(self): - state = [{'command':cm.command, 'arguments':cm.arguments} - for cm in self] - return state - - def __setstate__(self, state): - self.clear() - for cm_state in state: - self.append(CommandMessage( - command=cm_state['command'], - arguments=cm_state['arguments'])) - - def execute(self, hooke, stack=False): + def execute(self, hooke, filter=None, stack=False): """Execute a stack of commands. See Also -------- - _execute, filter + execute_command, filter """ + if filter == None: + filter = self.filter for command_message in self: - if self.filter(hooke, command_message) == True: + if filter(hooke, command_message) == True: self.execute_command( hooke=hooke, command_message=command_message, stack=stack) @@ -151,20 +205,10 @@ class FileCommandStack (CommandStack): super(FileCommandStack, self).__init__(*args, **kwargs) self.name = self.path = None - def __getstate__(self): - command_stack = super(FileCommandStack, self).__getstate__() - state = { - 'command stack': command_stack, - 'path': self.path, - 'name': self.name, - } - return state - def __setstate__(self, state): - super(FileCommandStack, self).__setstate__( - state.get('command stack', [])) - self.name = state.get('name', None) - self.path = None + self.name = self.path = None + for key,value in state.items: + setattr(self, key, value) self.set_path(state.get('path', None)) def set_path(self, path): diff --git a/hooke/curve.py b/hooke/curve.py index 75fbf75..64b4c61 100644 --- a/hooke/curve.py +++ b/hooke/curve.py @@ -194,36 +194,13 @@ class Curve (object): state = dict(self.__dict__) # make a copy of the attribute dict. state['info'] = dict(self.info) # make a copy of the info dict too. del(state['_hooke']) - dc = state['command_stack'] - if hasattr(dc, '__getstate__'): - state['command_stack'] = dc.__getstate__() - if state['info'].get('experiment', None) != None: - e = state['info']['experiment'] - assert isinstance(e, experiment.Experiment), type(e) - # HACK? require Experiment classes to be defined in the - # experiment module. - state['info']['experiment'] = e.__class__.__name__ return state def __setstate__(self, state): self.name = self._hooke = None for key,value in state.items(): - if key == 'path': - self.set_path(value) - continue - elif key == 'info': - if 'experiment' not in value: - value['experiment'] = None - elif value['experiment'] != None: - # HACK? require Experiment classes to be defined in the - # experiment module. - cls = getattr(experiment, value['experiment']) - value['experiment'] = cls() - elif key == 'command_stack': - v = CommandStack() - v.__setstate__(value) - value = v setattr(self, key, value) + self.set_path(state.get('path', None)) def set_hooke(self, hooke=None): if hooke != None: diff --git a/hooke/playlist.py b/hooke/playlist.py index 473e736..9ee3125 100644 --- a/hooke/playlist.py +++ b/hooke/playlist.py @@ -102,10 +102,10 @@ class NoteIndexList (list): if k == 'drivers': # HACK. Need better driver serialization. continue try: - yaml.safe_dump((k,v)) - except RepresenterError, e: + yaml.dump((k,v)) + except (TypeError, RepresenterError), e: raise NotImplementedError( - 'cannot convert %s.%s = %s (%s) to safe YAML' + 'cannot convert %s.%s = %s (%s) to YAML' % (owner.__class__.__name__, k, v, type(v))) def _setup_item(self, item): @@ -383,11 +383,14 @@ class FilePlaylist (Playlist): - info: {note: The first curve} name: one path: curve/one - - command_stack: - - arguments: {arg 0: 0, arg 1: X} - command: command A - - arguments: {arg 0: 1, arg 1: Y} - command: command B + - command_stack: !!python/object/new:hooke.command_stack.CommandStack + listitems: + - !!python/object:hooke.engine.CommandMessage + arguments: {arg 0: 0, arg 1: X} + command: command A + - !!python/object:hooke.engine.CommandMessage + arguments: {arg 0: 1, arg 1: Y} + command: command B info: {attr with spaces: 'The second curve with endlines'} @@ -410,11 +413,14 @@ class FilePlaylist (Playlist): - info: {note: The first curve} name: one path: /path/to/curve/one - - command_stack: - - arguments: {arg 0: 0, arg 1: X} - command: command A - - arguments: {arg 0: 1, arg 1: Y} - command: command B + - command_stack: !!python/object/new:hooke.command_stack.CommandStack + listitems: + - !!python/object:hooke.engine.CommandMessage + arguments: {arg 0: 0, arg 1: X} + command: command A + - !!python/object:hooke.engine.CommandMessage + arguments: {arg 0: 1, arg 1: Y} + command: command B info: {attr with spaces: 'The second curve with endlines'} @@ -462,11 +468,14 @@ class FilePlaylist (Playlist): ... items: ... - info: {note: The first curve} ... path: curve/one - ... - command_stack: - ... - arguments: {arg 0: 0, arg 1: X} - ... command: command A - ... - arguments: {arg 0: 1, arg 1: Y} - ... command: command B + ... - command_stack: !!python/object/new:hooke.command_stack.CommandStack + ... listitems: + ... - !!python/object:hooke.engine.CommandMessage + ... arguments: {arg 0: 0, arg 1: X} + ... command: command A + ... - !!python/object:hooke.engine.CommandMessage + ... arguments: {arg 0: 1, arg 1: Y} + ... command: command B ... info: {attr with spaces: 'The second curve ... ... with endlines'}