我有一个程序,随机生成一些元组,并将它们添加到一个列表中,用于制作位图图像。 问题是,我不断得到一个错误:
Traceback (most recent call last): File "/Users/Chill/Desktop/Untitled.py", line 27, in <module>
nextPixel((pixelList[-1])[0], (pixelList[-1])[1], t,) File "/Users/Chill/Desktop/Untitled.py", line 23, in nextPixel
if (i, j) not in pixelList: UnboundLocalError: local variable 'pixelList' referenced before assignment [Finished in 0.078s]
代码如下:
from random import randint
from PIL import Image
startPixel = (0, 0)
pixelList = [startPixel]
print(pixelList[-1])
print(pixelList[-1][0])
i = j = 0
#Replace 0 with timestamp for seed
t = 0
def nextPixel(i, j, t):
#Random from seed
iNew = i + randint(0, 2)
#Random from -seed
jNew = j + randint(0, 2)
if iNew == jNew:
jNew = (jNew + 1) % 2
iNew -= 1
jNew -= 1
#Checks pixel created does not already exist in the list
if (iNew, jNew) not in pixelList:
pixelList += (iNew, jNew)
while pixelList[-1][0] < 255:
nextPixel((pixelList[-1])[0], (pixelList[-1])[1], t)
有什么建议吗?你知道吗
似乎
pixelList
是一个元组列表,而nextPixel
函数意味着向它附加一个新元组。但是,行:实际上是试图连接新元组和列表。这将不起作用,因为未赋值的赋值将
pixelList
视为局部变量(该变量不存在,导致错误)。你知道吗你需要做的是:
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