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Python中所有可能組合的隨機化

[英]Randomizing in all possible combinations in Python

 原文  2015-03-04 19:52:31  4   3    python/ list/ random/ psychopy

問題描述

這是我的代碼： 

if condition == '1':
    a = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist1/*")
    c = glob.glob("DDtest/targetimagelist2/*")
    d = glob.glob("DDtest/distractorimagelist3/*")
    e = glob.glob("DDtest/targetimagelist4/*")
elif condition == '2':
    a = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist1/*")
    c = glob.glob("DDtest/targetimagelist2/*")
    e = glob.glob("DDtest/distractorimagelist3/*")
    d = glob.glob("DDtest/targetimagelist4/*")
elif condition == '3':
    a = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist1/*")
    e = glob.glob("DDtest/targetimagelist2/*")
    d = glob.glob("DDtest/distractorimagelist3/*")
    c = glob.glob("DDtest/targetimagelist4/*")
elif condition == '4':
    a = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist1/*")
    e = glob.glob("DDtest/targetimagelist2/*")
    c = glob.glob("DDtest/distractorimagelist3/*")
    d = glob.glob("DDtest/targetimagelist4/*")
elif condition == '5':
    a = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist1/*")
    d = glob.glob("DDtest/targetimagelist2/*")
    c = glob.glob("DDtest/distractorimagelist3/*")
    e = glob.glob("DDtest/targetimagelist4/*")
elif condition == '6':
    a = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist1/*")
    d = glob.glob("DDtest/targetimagelist2/*")
    e = glob.glob("DDtest/distractorimagelist3/*")
    c = glob.glob("DDtest/targetimagelist4/*")
elif condition == '7':
    d = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist2/*")
    a = glob.glob("DDtest/targetimagelist2/*")
    c = glob.glob("DDtest/distractorimagelist3/*")
    e = glob.glob("DDtest/targetimagelist4/*")
elif condition == '8':
    d = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist2/*")
    a = glob.glob("DDtest/targetimagelist2/*")
    e = glob.glob("DDtest/distractorimagelist3/*")
    c = glob.glob("DDtest/targetimagelist4/*")
elif condition == '9':
    d = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist3/*")
    e = glob.glob("DDtest/targetimagelist2/*")
    a = glob.glob("DDtest/distractorimagelist3/*")
    c = glob.glob("DDtest/targetimagelist4/*")
elif condition == '10':
    d = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist4/*")
    e = glob.glob("DDtest/targetimagelist2/*")
    c = glob.glob("DDtest/distractorimagelist3/*")
    a = glob.glob("DDtest/targetimagelist4/*")
elif condition == '11':
    d = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist4/*")
    c = glob.glob("DDtest/targetimagelist2/*")
    e = glob.glob("DDtest/distractorimagelist3/*")
    a = glob.glob("DDtest/targetimagelist4/*")
elif condition == '12':
    d = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist3/*")
    c = glob.glob("DDtest/targetimagelist2/*")
    a = glob.glob("DDtest/distractorimagelist3/*")
    e = glob.glob("DDtest/targetimagelist4/*")
elif condition == '13':
    c = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist2/*")
    a = glob.glob("DDtest/targetimagelist2/*")
    d = glob.glob("DDtest/distractorimagelist3/*")
    e = glob.glob("DDtest/targetimagelist4/*")
elif condition == '14':
    c = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist2/*")
    a = glob.glob("DDtest/targetimagelist2/*")
    e = glob.glob("DDtest/distractorimagelist3/*")
    d = glob.glob("DDtest/targetimagelist4/*")
elif condition == '15':
    c = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist3/*")
    e = glob.glob("DDtest/targetimagelist2/*")
    a = glob.glob("DDtest/distractorimagelist3/*")
    d = glob.glob("DDtest/targetimagelist4/*")
elif condition == '16':
    c = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist4/*")
    e = glob.glob("DDtest/targetimagelist2/*")
    d = glob.glob("DDtest/distractorimagelist3/*")
    a = glob.glob("DDtest/targetimagelist4/*")
elif condition == '17':
    c = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist4/*")
    d = glob.glob("DDtest/targetimagelist2/*")
    e = glob.glob("DDtest/distractorimagelist3/*")
    a = glob.glob("DDtest/targetimagelist4/*")
elif condition == '18':
    c = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist3/*")
    d = glob.glob("DDtest/targetimagelist2/*")
    a = glob.glob("DDtest/distractorimagelist3/*")
    e = glob.glob("DDtest/targetimagelist4/*")
elif condition == '19':
    e = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist2/*")
    a = glob.glob("DDtest/targetimagelist2/*")
    c = glob.glob("DDtest/distractorimagelist3/*")
    d = glob.glob("DDtest/targetimagelist4/*")
elif condition == '20':
    e = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist2/*")
    a = glob.glob("DDtest/targetimagelist2/*")
    d = glob.glob("DDtest/distractorimagelist3/*")
    c = glob.glob("DDtest/targetimagelist4/*")
elif condition == '21':
    e = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist3/*")
    c = glob.glob("DDtest/targetimagelist2/*")
    a = glob.glob("DDtest/distractorimagelist3/*")
    d = glob.glob("DDtest/targetimagelist4/*")
elif condition == '22':
    e = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist4/*")
    c = glob.glob("DDtest/targetimagelist2/*")
    d = glob.glob("DDtest/distractorimagelist3/*")
    a = glob.glob("DDtest/targetimagelist4/*")
elif condition == '23':
    e = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist4/*")
    d = glob.glob("DDtest/targetimagelist2/*")
    c = glob.glob("DDtest/distractorimagelist3/*")
    a = glob.glob("DDtest/targetimagelist4/*")
elif condition == '24':
    e = glob.glob("DDtest/targetimagelist1/*")
    b = glob.glob("DDtest/distractorimagelist3/*")
    d = glob.glob("DDtest/targetimagelist2/*")
    a = glob.glob("DDtest/distractorimagelist3/*")
    c = glob.glob("DDtest/targetimagelist4/*")

基本上，這是基於a，c，d，e的所有組合從不同的列表中提取的，並使a和b對應。 該代碼可以正常工作，但不是很漂亮。 我想知道是否有人建議我用更少的代碼行做同樣的事情。 最重要的是，我只是想擴展我的代碼編寫知識，因此，如果您知道一種更雄辯的編寫方法，請告訴我。 :)

3 個解決方案

解決方案1
 2  2015-03-04 20:23:40

不確定“使a和b對應”是什么意思，但是也許可以： 

from itertools import permutations
from random import choice

globs = [glob.glob("DDtest/targetimagelist1/*"),
         glob.glob("DDtest/distractorimagelist1/*"),
         glob.glob("DDtest/targetimagelist2/*"),
         glob.glob("DDtest/distractorimagelist3/*"),
         glob.glob("DDtest/targetimagelist4/*")]

glob_permutations = list(permutations(globs))

a, b, c, d, e = choice(glob_permutations)

解決方案2
 1  2015-03-04 20:24:40

內置的itertools庫具有用於排列而不重復的功能： 

#!/usr/bin/env python2
import itertools
import glob

p = [
    glob.glob("DDtest/targetimagelist1/*"),
    glob.glob("DDtest/distractorimagelist4/*"),
    glob.glob("DDtest/targetimagelist2/*"),
    glob.glob("DDtest/distractorimagelist3/*"),
    glob.glob("DDtest/targetimagelist4/*"),
]

perm = itertools.permutations(p)

print(len(perm))

=> 120個排列

解決方案3
 0  2015-03-04 19:58:55

也許那樣嗎？ 

setup = {'1': ('1','1','2','3','4'),
         '2': ('1','1','2','3','4'),
        #...
        }
a = glob.glob("DDtest/targetimagelist" + setup[condition][0] + "/*")
b = glob.glob("DDtest/distractorimagelist" + setup[condition][1] + "/*")
c = glob.glob("DDtest/targetimagelist" + setup[condition][2] + "/*")
d = glob.glob("DDtest/distractorimagelist" + setup[condition][3] + "/*")
e = glob.glob("DDtest/targetimagelist" + setup[condition][4] + "/*")

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