Question

我编写了一个简短的程序，该程序实际上是从3个列表中选择3个对象，对选择进行索引，然后应该再也不能做出相同的选择。这非常接近，唯一的问题是而不是再也不会选择序列了，它总是选择相同的序列吗？

trial_index = 0 
trials = [None] 

digits = ['0', '1','2','3'] 
word = [ "word1", "word2"]
images = [image1, image2, image3] 

digit_index = random.randint(0,3) 
word_index = random.randint(0,1)
image_index = random.randint(0,2) 

trials[trial_index] = digit_index + word_index + image_index

trial_index+=1 

selected_trial = " " 
selected_trial = trials

# Up until this point behaviour functions as expected I think... 

# This doesn't work, I assumed that what would occur is that as long as this evaluated to TRUE it would run this code forcing it to choose a new sequence? 

while selected_trial in trials: 

    digit_index = random.randint(0,3)
    word_index = random.randint(0,1)
    image_index = random.randint(0,13)
    selected_trial = digit_index + word_index + image_index 
    trials[trial_index] = selected_trial
    trial_index += 1

Answer 1

Using random.choice I made it simpler - and now it works correctly.

import random

digits = ['0', '1','2','3'] 
word   = ['word1', 'word2']
images = ['image1', 'image2', 'image3'] 

trials = []

d = random.choice(digits)
w = random.choice(word)
i = random.choice(images)

trials.append( (d,w,i) )

while (d,w,i) in trials:
    d = random.choice(digits)
    w = random.choice(word)
    i = random.choice(images)

trials.append( (d,w,i) )

print(trials)

EDIT: this works with indexes

import random

trials = [] 
trial_index = 0 

digits = ['0', '1', '2', '3'] 
word   = [ "word1", "word2"]
images = ['image1', 'image2', 'image3'] 

digit_index = random.randint(0, 3) 
word_index  = random.randint(0, 1)
image_index = random.randint(0, 2) 

selected_trial = (digit_index, word_index, image_index)

trials.append( selected_trial )
trial_index += 1 
#trial_index = len(trials)

while selected_trial in trials: 

    digit_index = random.randint(0, 3)
    word_index  = random.randint(0, 1)
    image_index = random.randint(0, 2)
    selected_trial = (digit_index, word_index, image_index)

trials.append( selected_trial )
trial_index += 1
#trial_index = len(trials)

print( trials )

使用while循环的奇怪行为（不符合预期！）

1 个答案: