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from PIL import Image
img = Image.open('C:\\Users\仲益\Desktop\steak.jpg')
img_array = img.load()#加载图片
w,h = img.size
for x in range(w):
    for y in range(h):
        img_array[x,y] = (0,255,0)
img.save('C:\\Users\仲益\Desktop\green.jpg')