如何在python中draw samples

https://stackoverflow.com/questions/10803135/weighted-choice-short-and-simple/15907274

[Youtube videos tutorial]https://www.youtube.com/watch?v=KzqSDvzOFNA&pbjreload=101&ab_channel=CoreySchafer

Since Python 3.6 there is a method choices from the random module.

import random
random.choices(population = [['a','b'], ['b','a'], ['c','b']],
               weights = [0.2, 0.2, 0.6],
               k = 10)

import random
random.choices(['one', 'two', 'three'], [0.2, 0.3, 0.5], k=10)

也可以用numpy模块

numpy.random.choice(items, trials, p = probs)

Since numpy version 1.7 you can use numpy.random.choice():

elements = ['one', 'two', 'three'] 
weights = [0.2, 0.3, 0.5]

from numpy.random import choice
print(choice(elements, p = weights))

通过这个语句可以按照一定的概率选取一个或几个元素，用来控制强化学习任务中的输钱和赢钱的

random.choices(population = ['H', 'T'], weights = [0.3, 0.7], k = 1)

Note that random.choices will sample with replacement, per the docs:

https://pynative.com/python-random-choice/

Use random.choice() to Randomly select an item from a list

import random
movie_list = ['The Godfather', 'The Wizard of Oz', 'Citizen Kane', 'The Shawshank Redemption', 'Pulp Fiction']

moview_item = random.choice(movie_list)
print ("Randomly selected item from list is - ", moview_item)

https://pynative.com/python-weighted-random-choices-with-probability/

random.choices()

Python 3.6 introduced a new function choices() in the random module. By using random.choices() we can make a weighted random choice with replacement. You can also call it a weighted random sample with replacement. Let’s have a look into the syntax of this function.