I noticed that the random library does not provide `random.randbool()`.
Generating bool value is quite common in the use-case when we generated faked data
(unittest, machine learning training, etc)

Somebody can say write your own library but it's too common use-case and in physically some isolated environments is hard to use 3rd party library.

Since the bool value is the built-in type of python, I think that is very useful when we provide this function.

I would like to get opinions from Raymond and then proceed with this issue.

Here is the candidate implementation:

def randbool():
    return bool(getrandbits(1))