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52 lines
1.6 KiB
Python
52 lines
1.6 KiB
Python
import numpy as np
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from .space import Space
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class Tuple(Space):
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"""
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A tuple (i.e., product) of simpler spaces
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Example usage:
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self.observation_space = spaces.Tuple((spaces.Discrete(2), spaces.Discrete(3)))
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"""
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def __init__(self, spaces):
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self.spaces = spaces
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for space in spaces:
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assert isinstance(space, Space), "Elements of the tuple must be instances of gym.Space"
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super(Tuple, self).__init__(None, None)
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def seed(self, seed=None):
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[space.seed(seed) for space in self.spaces]
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def sample(self):
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return tuple([space.sample() for space in self.spaces])
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def contains(self, x):
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if isinstance(x, list):
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x = tuple(x) # Promote list to tuple for contains check
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return (
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isinstance(x, tuple)
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and len(x) == len(self.spaces)
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and all(space.contains(part) for (space, part) in zip(self.spaces, x))
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)
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def __repr__(self):
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return "Tuple(" + ", ".join([str(s) for s in self.spaces]) + ")"
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def to_jsonable(self, sample_n):
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# serialize as list-repr of tuple of vectors
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return [space.to_jsonable([sample[i] for sample in sample_n]) for i, space in enumerate(self.spaces)]
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def from_jsonable(self, sample_n):
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return [sample for sample in zip(*[space.from_jsonable(sample_n[i]) for i, space in enumerate(self.spaces)])]
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def __getitem__(self, index):
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return self.spaces[index]
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def __len__(self):
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return len(self.spaces)
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def __eq__(self, other):
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return isinstance(other, Tuple) and self.spaces == other.spaces
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