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https://github.com/Farama-Foundation/Gymnasium.git
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ad79b0ad0f
* typing in spaces.Box and spaces.Discrete * adds typing to dict and tuple spaces * Typecheck all spaces * Explicit regex to include all files under space folder * Style: use native types and __future__ annotations * Allow only specific strings for Box.is_bounded args * Add typing to changes from #2517 * Remove Literal as it's not supported by py3.7 * Use more recent version of pyright * Avoid name clash for type checker * Revert "Avoid name clash for type checker" This reverts commit 1aaf3e0e0328171623a17a997b65fe734bc0afb1. * Ignore the error. It's reported as probable bug at https://github.com/microsoft/pyright/issues/2852 * rebase and add typing for `_short_repr`
52 lines
1.4 KiB
Python
52 lines
1.4 KiB
Python
from typing import Optional
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import numpy as np
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from .space import Space
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class Discrete(Space[int]):
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r"""A discrete space in :math:`\{ 0, 1, \\dots, n-1 \}`.
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A start value can be optionally specified to shift the range
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to :math:`\{ a, a+1, \\dots, a+n-1 \}`.
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Example::
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>>> Discrete(2)
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>>> Discrete(3, start=-1) # {-1, 0, 1}
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"""
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def __init__(self, n: int, seed: Optional[int] = None, start: int = 0):
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assert n > 0, "n (counts) have to be positive"
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assert isinstance(start, (int, np.integer))
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self.n = int(n)
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self.start = int(start)
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super().__init__((), np.int64, seed)
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def sample(self) -> int:
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return self.start + self.np_random.randint(self.n)
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def contains(self, x) -> bool:
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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 (
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x.dtype.char in np.typecodes["AllInteger"] and x.shape == ()
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):
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as_int = int(x) # type: ignore
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else:
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return False
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return self.start <= as_int < self.start + self.n
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def __repr__(self) -> str:
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if self.start != 0:
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return "Discrete(%d, start=%d)" % (self.n, self.start)
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return "Discrete(%d)" % self.n
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def __eq__(self, other) -> bool:
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return (
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isinstance(other, Discrete)
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and self.n == other.n
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and self.start == other.start
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)
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