random – 伪随机数和选择

该 random 模块是 CPython random模块的严格子集。因此，用 CircuitPython 编写的代码可以在 CPython 中运行，但不一定反过来。

就像它的 CPython 表亲一样，CircuitPython 的随机种子在第一次使用时使用来自 os.urandom() 的真正随机数，或者其他情况下的正常运行时间。一旦播种，它将是确定性的，这就是为什么它对密码学不利。

警告

此模块中的数字密码不强！os.urandom直接使用字节来自真正的随机性。

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random._T
random.seed(seed: int) → None

设置随机数生成的起始种子。之后进一步调用 random将返回确定性结果。

random.getrandbits(k: int) → int

返回具有k 个随机位的整数。

random.randrange(stop: Tuple[int, int, int]) → int

从 中返回一个随机选择的整数。range(start, stop, step).

random.randint(a: int, b: int) → int

返回 a 和 b 之间随机选择的整数。相当于randrange(a, b + 1, 1)

random.choice(seq: Sequence[_T]) → _T

从给定的序列中返回一个随机选择的元素。当序列为空时引发 IndexError 。

random.random() → float

返回 0 到 1.0 之间的随机浮点数。

random.uniform(a: float, b: float) → float

返回 a 和 b 之间的随机浮点数。它可能包含也可能不包含，具体取决于浮动舍入。