我怎样才能使random.randint函数不吐两次相同的数字？

Question

我正在编写一个随机选择Rubik的立方体算法进行练习的代码，但我不想两次获得相同的数字。我怎样才能做到这一点？这是我的代码：

import random

one = 'Fi U2 Fi U2 F2 U2 Fi Ri Fi Di F2 D'
two = 'Ri Ui Fi U F R F2 U F2 Di F2 D R2'
three = 'Fi U2 F2 U F2 U F L2 B L Bi L'
four = 'Bi Li B2 L Bi R2 Di F2 U F2 R2 D'

print("How many scrambles do ypu want?")

try:
    qty = int(input("Scrambles: "))


except ValueError:

    print("please write a number")

for i in range(0, qty):
    scramble = random.randint(0, 4)
    #print (scramble)

    if scramble == 1:
        print(one)
    elif scramble == 2:
        print(two)
    elif scramble == 3:
        print(three)
    elif scramble == 4:
        print(four)