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35 lines
860 B
Python
35 lines
860 B
Python
import numpy as np
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from .space import Space
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class Discrete(Space):
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"""A discrete space in :math:`\{ 0, 1, \dots, n-1 \}`.
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Example::
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>>> Discrete(2)
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"""
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def __init__(self, n):
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assert n >= 0
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self.n = n
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super(Discrete, self).__init__((), np.int64)
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def sample(self):
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return self.np_random.randint(self.n)
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def contains(self, x):
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if isinstance(x, int):
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as_int = x
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elif isinstance(x, (np.generic, np.ndarray)) and (x.dtype.kind in np.typecodes['AllInteger'] and x.shape == ()):
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as_int = int(x)
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else:
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return False
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return as_int >= 0 and as_int < self.n
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def __repr__(self):
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return "Discrete(%d)" % self.n
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def __eq__(self, other):
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return isinstance(other, Discrete) and self.n == other.n
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