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import stormpy
import stormpy.core
import stormpy.examples
import stormpy.examples.files
def example_exploration_02():
"""
Example to exploration of POMDPs.
:return:
"""
program = stormpy.parse_prism_program(stormpy.examples.files.prism_pomdp_maze)
prop = "R=? [F \"goal\"]"
properties = stormpy.parse_properties(prop, program)
model = stormpy.build_model(program, properties)
print(model.model_type)
# Internally, POMDPs are just MDPs with additional observation information.
# Thus, data structure exploration for MDPs can be applied as before.
initial_state = model.initial_states[0]
for state in model.states:
if state.id in model.initial_states:
print(state)
for action in state.actions:
for transition in action.transitions:
print("From state {} by action {}, with probability {}, go to state {}".format(state, action, transition.value(),
transition.column))
print(model.nr_observations)
for state in model.states:
print("State {} has observation id {}".format(state.id, model.observations[state.id]))
if __name__ == '__main__':
example_exploration_02()