How to generate a random list of fixed length of values from given range?

Question

How to generate a random (but unique and sorted) list of a fixed given length out of numbers of a given range in Python?

Something like that:

>>         


        

Answer 1

import random


def simplest(list_length):
    core_items = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
    random.shuffle(core_items)
    return core_items[0:list_length]

def full_random(list_length):
    core_items = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
    result = []
    for i in range(list_length):
        result.append(random.choice(core_items))
    return result

Answer 2

A random sample like this returns list of unique items of sequence. Don't confuse this with random integers in the range.

>>> import random
>>> random.sample(range(30), 4)
[3, 1, 21, 19]

Answer 3

A combination of random.randrange and list comprehension would work.

import random
[random.randrange(1, 10) for _ in range(0, 4)]