如何从列表中随机选择一个项目？

Question

Assume I have the following list:

foo = ['a', 'b', 'c', 'd', 'e']

What is the simplest way to retrieve an item at random from this list?

转载于:https://stackoverflow.com/questions/306400/how-to-randomly-select-an-item-from-a-list

Answer 1

Use random.choice:

import random

foo = ['a', 'b', 'c', 'd', 'e']
print(random.choice(foo))

For cryptographically secure random choices (e.g. for generating a passphrase from a wordlist), use random.SystemRandom class:

import random

foo = ['battery', 'correct', 'horse', 'staple']
secure_random = random.SystemRandom()
print(secure_random.choice(foo))