【发布时间】：2013-08-11 14:40:50
【问题描述】：
所以我有一个 python 脚本，它生成一个图像，并保存过去作为背景图像的旧图像。
我尝试使用 crontab 让它运行，但无法让它工作，所以现在我只有一个 bash 脚本，它在我的 .bashrc 中运行一次，当我第一次登录时（我有一个 @987654323 @ 里面的东西）。
问题是，当背景更新时，它会不时闪烁黑色 - 这不是很好！
我目前让它每秒运行一次，但我不认为是 python 导致了黑屏，更多的是图像转换的方式......
有什么方法可以防止更新之间出现这些丑陋的黑屏吗？
这是运行它的所有代码，如果你想尝试一下......
从 PIL 导入 Image、ImageDraw、ImageFilter 导入颜色系统 从随机导入高斯
xSize, ySize = 1600,900
im = Image.new('RGBA', (xSize, ySize), (0, 0, 0, 0))
draw = ImageDraw.Draw(im)
class Cube(object):
def __init__(self):
self.tl = (0,0)
self.tm = (0,0)
self.tr = (0,0)
self.tb = (0,0)
self.bl = (0,0)
self.bm = (0,0)
self.br = (0,0)
def intify(self):
for prop in [self.tl, self.tm, self.tr, self.tb, self.bl, self.bm, self.br]:
prop = [int(i) for i in prop]
def drawCube((x,y), size, colour=(255,0,0)):
p = Cube()
colours = [list(colorsys.rgb_to_hls(*[c/255.0 for c in colour])) for _ in range(3)]
colours[0][1] -= 0
colours[1][1] -= 0.2
colours[2][1] -= 0.4
colours = [tuple([int(i*255) for i in colorsys.hls_to_rgb(*colour)]) for colour in colours]
p.tl = x,y #Top Left
p.tm = x+size/2, y-size/4 #Top Middle
p.tr = x+size, y #Top Right
p.tb = x+size/2, y+size/4 #Top Bottom
p.bl = x, y+size/2 #Bottom Left
p.bm = x+size/2, y+size*3/4 #Bottom Middle
p.br = x+size, y+size/2 #Bottom Right
p.intify()
draw.polygon((p.tl, p.tm, p.tr, p.tb), fill=colours[0])
draw.polygon((p.tl, p.bl, p.bm, p.tb), fill=colours[1])
draw.polygon((p.tb, p.tr, p.br, p.bm), fill=colours[2])
lineColour = (0,0,0)
lineThickness = 2
draw.line((p.tl, p.tm), fill=lineColour, width=lineThickness)
draw.line((p.tl, p.tb), fill=lineColour, width=lineThickness)
draw.line((p.tm, p.tr), fill=lineColour, width=lineThickness)
draw.line((p.tb, p.tr), fill=lineColour, width=lineThickness)
draw.line((p.tl, p.bl), fill=lineColour, width=lineThickness)
draw.line((p.tb, p.bm), fill=lineColour, width=lineThickness)
draw.line((p.tr, p.br), fill=lineColour, width=lineThickness)
draw.line((p.bl, p.bm), fill=lineColour, width=lineThickness)
draw.line((p.bm, p.br), fill=lineColour, width=lineThickness)
# -------- Actually do the drawing
size = 100
#Read in file of all colours, and random walk them
with open("/home/will/Documents/python/cubeWall/oldColours.dat") as coloursFile:
for line in coloursFile:
oldColours = [int(i) for i in line.split()]
oldColours = [int(round(c + gauss(0,1.5)))%255 for c in oldColours]
colours = [[ int(c*255) for c in colorsys.hsv_to_rgb(i/255.0, 1, 1)] for i in oldColours]
with open("/home/will/Documents/python/cubeWall/oldColours.dat", "w") as coloursFile:
coloursFile.write(" ".join([str(i) for i in oldColours]) + "\n")
for i in range(xSize/size+2):
for j in range(2*ySize/size+2):
if j%3 == 0:
drawCube((i*size,j*size/2), size, colour=colours[(i+j)%3])
elif j%3 == 1:
drawCube(((i-0.5)*size,(0.5*j+0.25)*size), size, colour=colours[(i+j)%3])
im2 = im.filter(ImageFilter.SMOOTH)
im2.save("cubes.png")
#im2.show()
然后运行这个：
#!/bin/sh
while [ 1 ]
do
python drawCubes.py
sleep 1
done
并设置桌面图片为cubes.png
【问题讨论】：
标签： python bash unix cron python-imaging-library