随机和序列随机选择和样本

import random

洗牌()

你可以使用 random.shuffle()可变和可索引的顺序混合/随机化项目。例如一个 list

laughs = ["Hi", "Ho", "He"]

random.shuffle(laughs)     # Shuffles in-place! Don't do: laughs = random.shuffle(laughs)

print(laughs)
# Out: ["He", "Hi", "Ho"]  # Output may vary!

选择()

从任意序列中获取随机元素 :

print(random.choice(laughs))
# Out: He                  # Output may vary!

样品()

choice 一样,它从随机序列中获取随机元素,但你可以指定多少:

#                   |--sequence--|--number--|
print(random.sample(    laughs   ,     1    ))  # Take one element
# Out: ['Ho']                    # Output may vary!

它不会采用相同的元素两次:

print(random.sample(laughs, 3))  # Take 3 random element from the sequence.
# Out: ['Ho', 'He', 'Hi']        # Output may vary!

print(random.sample(laughs, 4))  # Take 4 random element from the 3-item sequence.

ValueError:大于人口的样本