""" A simple top-down parser. """ import re import sys import simpy import pyactr as actr try: SIMULATION = int(sys.argv[1]) except IndexError: SIMULATION = 1 environment = actr.Environment(focus_position=(320, 180)) actr.chunktype("parsing_goal", "stack_top stack_middle stack_bottom parsed_word task") actr.chunktype("parse_state", "mother daughter1 daughter2") actr.chunktype("word", "form cat") parser = actr.ACTRModel(environment) dm = parser.decmem g = parser.goal imaginal = parser.set_goal(name="imaginal", delay=0.05) dm.add(actr.chunkstring(string=""" isa word form evidence cat N """)) dm.add(actr.chunkstring(string=""" isa word form doctor cat N """)) dm.add(actr.chunkstring(string=""" isa word form the cat D """)) dm.add(actr.chunkstring(string=""" isa word form examined cat V """)) dm.add(actr.chunkstring(string=""" isa word form talked cat V """)) dm.add(actr.chunkstring(string=""" isa word form about cat P """)) dm.add(actr.chunkstring(string=""" isa word form by cat P """)) g.add(actr.chunkstring(string=""" isa parsing_goal task read_word stack_top S """)) parser.productionstring(name="press spacebar", string=""" =g> isa parsing_goal task press_space stack_top ~None ?manual> state free ==> =g> isa parsing_goal task read_word +manual> isa _manual cmd 'press_key' key 'space' ~imaginal> """) parser.productionstring(name="encode word", string=""" =g> isa parsing_goal task read_word =visual> isa _visual value =val ==> =g> isa parsing_goal task get_word_cat parsed_word =val ~visual> """) parser.productionstring(name="retrieve category", string=""" =g> isa parsing_goal task get_word_cat parsed_word =w ==> +retrieval> isa word form =w =g> isa parsing_goal task match_category """) parser.productionstring(name="match category", string=""" =g> isa parsing_goal task match_category ?retrieval> state free buffer full =retrieval> isa word cat =c ==> =g> isa parsing_goal task parsing parsed_word =c """) parser.productionstring(name="expand: S ==> NP VP", string=""" =g> isa parsing_goal task parsing stack_top S stack_middle =x ==> =g> isa parsing_goal stack_top NP stack_middle VP stack_bottom =x +imaginal> isa parse_state mother S daughter1 NP daughter2 VP """) parser.productionstring(name="expand: NP ==> NP VP", string=""" =g> isa parsing_goal task parsing stack_top NP stack_middle =x =imaginal> isa parse_state mother ~NP ==> =g> isa parsing_goal stack_top NP stack_middle VP stack_bottom =x +imaginal> isa parse_state mother NP daughter1 NP daughter2 VP """, utility=-1) #utility above 0 ensures that this rule takes precendence #over the rule expand: NP ==> D N parser.productionstring(name="expand: NP ==> D N", string=""" =g> isa parsing_goal task parsing stack_top NP stack_middle =x ?imaginal> state free ==> =g> isa parsing_goal stack_top D stack_middle N stack_bottom =x +imaginal> isa parse_state mother NP daughter1 D daughter2 N """) parser.productionstring(name="expand: VP ==> V NP", string=""" =g> isa parsing_goal task parsing stack_top VP stack_middle =x ==> =g> isa parsing_goal stack_top V stack_middle NP stack_bottom =x +imaginal> isa parse_state mother VP daughter1 V daughter2 NP """) parser.productionstring(name="expand: VP ==> V PP", string=""" =g> isa parsing_goal task parsing stack_top VP stack_middle =x ==> =g> isa parsing_goal stack_top V stack_middle PP stack_bottom =x +imaginal> isa parse_state mother VP daughter1 V daughter2 PP """, utility=1) #utility>0 ensures that this rule takes precedence #over the rule expand: VP ==> V NP parser.productionstring(name="expand: PP ==> P NP", string=""" =g> isa parsing_goal task parsing stack_top PP stack_middle =x ==> =g> isa parsing_goal stack_top P stack_middle NP stack_bottom =x +imaginal> isa parse_state mother PP daughter1 P daughter2 NP """) parser.productionstring(name="scan: word", string=""" =g> isa parsing_goal task parsing stack_top =y stack_middle =x stack_bottom =b parsed_word =y ==> =g> isa parsing_goal task press_space stack_top =x stack_middle =b stack_bottom None parsed_word None """) if __name__ == "__main__": stimuli = [ [{1: {'text': 'the', 'position': (320, 180)}}, {1: {'text': 'doctor', 'position': (320, 180)}}, {1: {'text': 'talked', 'position': (320, 180)}}, {1: {'text': 'about', 'position': (320, 180)}}, {1: {'text': 'the', 'position': (320, 180)}}, {1: {'text': 'evidence', 'position': (320, 180)}}, ], [{1: {'text': 'the', 'position': (320, 180)}}, {1: {'text': 'evidence', 'position': (320, 180)}}, {1: {'text': 'examined', 'position': (320, 180)}}, {1: {'text': 'by', 'position': (320, 180)}}, {1: {'text': 'the', 'position': (320, 180)}}, {1: {'text': 'doctor', 'position': (320, 180)}} ]] parser_sim = parser.simulation( realtime=SIMULATION, gui=SIMULATION, environment_process=environment.environment_process, stimuli=stimuli[0], triggers='space') if not SIMULATION: while True: try: parser_sim.step() except simpy.core.EmptySchedule: break if re.search("^KEY PRESSED: SPACE", parser_sim.current_event.action): print(parser.goals["g"]) input() else: parser_sim.run(3) sortedDM = sorted(([item[0], time] for item in dm.items()\ for time in item[1]),\ key=lambda item: item[1]) print("\nParse states in declarative memory at the end of the simulation", "\nordered by time of (re)activation:") for chunk in sortedDM: if chunk[0].typename == "parse_state": print(chunk[1], "\t", chunk[0])