How to avoid duplication of random elements in python

Python can avoid duplication of random elements by using the sample() function of the random module, which returns a new list that stores random non-repeating elements.

Function usage example: (Recommended learning: Python video tutorial)

range() range can only be integers

random.sample(population, k)

Returns a k-length list of unique elements selected from the overall sequence or collection (potution) (list). The new list stores random non-repeating elements. Used for random sampling without replacement.

import random

list = [1, 2, 3]
print(random.sample(list ,2))

list = ["china","python","sky"]
print(random.sample(list ,2))

list = range(1, 10000)
print(random.sample(list ,5))

输出：
[1, 2]
['python', 'sky']
[6912, 1869, 5991, 721, 3388]

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