在python中获取随机布尔值

亚当的答案很快，但我发现random.getrandbits(1)比random.getrandbits(1)快得多.如果你真的想要布尔型而不是长型

bool(random.getrandbits(1))

仍然是random.choice([True, False])的两倍

这两种解决方案都需要import random

如果最高速度不是优先考虑的，那么random.choice肯定读起来更好.

注意，由于属性查找，random.choice()比choice()(from random import choice之后)慢.

$ python3 --version
Python 3.9.7
$ python3 -m timeit -s "from random import choice" "choice([True, False])"
1000000 loops, best of 5: 376 nsec per loop
$ python3 -m timeit -s "from random import choice" "choice((True, False))"
1000000 loops, best of 5: 352 nsec per loop
$ python3 -m timeit -s "from random import getrandbits" "getrandbits(1)"
10000000 loops, best of 5: 33.7 nsec per loop
$ python3 -m timeit -s "from random import getrandbits" "bool(getrandbits(1))"
5000000 loops, best of 5: 89.5 nsec per loop
$ python3 -m timeit -s "from random import getrandbits" "not getrandbits(1)"
5000000 loops, best of 5: 46.3 nsec per loop
$ python3 -m timeit -s "from random import random" "random() < 0.5"
5000000 loops, best of 5: 46.4 nsec per loop