python-imaging-library - Python 图像库 : AttributeError: 'NoneType' object has no attribute XXX

Question

我用PIL打开了一张图片，但是当我尝试使用split()时拆分 channel 我收到以下错误:AttributeError: 'NoneType' object has no attribute 'bands'

import Image
img = Image.open('IMG_0007.jpg')

img.split()
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)

/home/blum/<ipython console> in <module>()

/usr/lib/python2.6/dist-packages/PIL/Image.pyc in split(self)
   1495         "Split image into bands"
   1496 
-> 1497         if self.im.bands == 1:
   1498             ims = [self.copy()]
   1499         else:

AttributeError: 'NoneType' object has no attribute 'bands'

Answer 1

通过谷歌搜索，我发现了这个 comment on SO, stating that PIL is sometimes 'lazy'打开后“忘记”加载。所以你必须这样做:

import Image
img = Image.open('IMG_0007.jpg')
img.load()
img.split()

也请+1原始评论!这个人做了真正的工作。