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81 行
3.4 KiB
81 行
3.4 KiB
import json
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import numpy as np
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from .exception import UnityEnvironmentException
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class Curriculum(object):
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def __init__(self, location, default_reset_parameters):
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"""
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Initializes a Curriculum object.
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:param location: Path to JSON defining curriculum.
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:param default_reset_parameters: Set of reset parameters for environment.
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"""
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self.lesson_number = 0
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self.lesson_length = 0
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self.measure_type = None
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if location is None:
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self.data = None
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else:
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try:
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with open(location) as data_file:
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self.data = json.load(data_file)
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except FileNotFoundError:
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raise UnityEnvironmentException(
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"The file {0} could not be found.".format(location))
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except UnicodeDecodeError:
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raise UnityEnvironmentException("There was an error decoding {}".format(location))
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self.smoothing_value = 0
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for key in ['parameters', 'measure', 'thresholds',
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'min_lesson_length', 'signal_smoothing']:
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if key not in self.data:
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raise UnityEnvironmentException("{0} does not contain a "
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"{1} field.".format(location, key))
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parameters = self.data['parameters']
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self.measure_type = self.data['measure']
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self.max_lesson_number = len(self.data['thresholds'])
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for key in parameters:
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if key not in default_reset_parameters:
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raise UnityEnvironmentException(
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"The parameter {0} in Curriculum {1} is not present in "
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"the Environment".format(key, location))
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for key in parameters:
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if len(parameters[key]) != self.max_lesson_number + 1:
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raise UnityEnvironmentException(
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"The parameter {0} in Curriculum {1} must have {2} values "
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"but {3} were found".format(key, location,
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self.max_lesson_number + 1, len(parameters[key])))
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@property
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def measure(self):
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return self.measure_type
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def get_lesson_number(self):
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return self.lesson_number
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def set_lesson_number(self, value):
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self.lesson_length = 0
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self.lesson_number = max(0, min(value, self.max_lesson_number))
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def get_lesson(self, progress):
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"""
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Returns reset parameters which correspond to current lesson.
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:param progress: Measure of progress (either reward or percentage steps completed).
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:return: Dictionary containing reset parameters.
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"""
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if self.data is None or progress is None:
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return {}
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if self.data["signal_smoothing"]:
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progress = self.smoothing_value * 0.25 + 0.75 * progress
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self.smoothing_value = progress
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self.lesson_length += 1
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if self.lesson_number < self.max_lesson_number:
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if ((progress > self.data['thresholds'][self.lesson_number]) and
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(self.lesson_length > self.data['min_lesson_length'])):
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self.lesson_length = 0
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self.lesson_number += 1
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config = {}
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parameters = self.data["parameters"]
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for key in parameters:
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config[key] = parameters[key][self.lesson_number]
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return config
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