True or false output based on a probability

问题

Is there a standard function for Python which outputs True or False probabilistically based on the input of a random number from 0 to 1?

example of what I mean:

def decision(probability):
    ...code goes here...
    return ...True or False...

the above example if given an input of, say, 0.7 will return True with a 70% probability and false with a 30% probability

回答1:

import random

def decision(probability):
    return random.random() < probability

回答2:

Given a function rand that returns a number between 0 and 1, you can define decision like this:

bool decision(float probability)
{
   return rand()<probability;
}

Assuming that rand() returns a value in the range [0.0, 1.0) (so can output a 0.0, will never output a 1.0).

回答3:

If you want to amass a lot of data, I would suggest using a map:

    from numpy import random as rn
    p = 0.15
    data = rn.random(100)
    final_data = list(map(lambda x: x < p, data))

来源：https://stackoverflow.com/questions/5886987/true-or-false-output-based-on-a-probability