On 2018-12-28 16:15, Abdur-Rahmaan Janhangeer wrote: > greetings, > > let us say that i have a box of 5 balls, > > green balls - 2 with probability 2/5 > red balls 2 - with probability 2/5 > blue balls 1 - with probability 1/5 > > how to program the selection so that the random choices reflect the > probabilities?
You're looking for what are called "weighted choices" which the random.choice() function provides as of Py3.6 https://docs.python.org/3/library/random.html#random.choices >>> from random import choices >>> distribution = {"green":2, "red": 2, "blue", 1} >>> data, weights = zip(*distribution.items()) >>> sum(weights) 5 >>> sorted(choices(data, weights=weights, k=20)) ['blue', 'blue', 'blue', 'blue', 'green', 'green', 'green', 'green', 'green', 'green', 'green', 'green', 'red', 'red', 'red', 'red', 'red', 'red', 'red', 'red'] -tim -- https://mail.python.org/mailman/listinfo/python-list
