PIL: AttributeError: 'NoneType' object has no attribute 'show'
Question: I'm trying to use PIL to show an image loaded from a list of numbers.

My entire code looks like this:

    
    
    from PIL import Image
    import os, sys
    
    L = 4 #resolution increase
    
    LR_DIM = (2592, 1944)
    HR_DIM = (LR_DIM[0]*L, LR_DIM[1]*L)
    
    HR = [0] * (HR_DIM[0] * HR_DIM[1]) 
    
    #include low-res files
    LR = []
    LR.append([[250 for x in range(LR_DIM[0])] for y in range(LR_DIM[1])])
    
    img = Image.new("L", LR_DIM)
    img = img.putdata(LR[0])
    img.show()
    

and I got to the last line and get the error in the title.

What's wrong?

I'm on Windows, and using Python32 and a fresh install of both Python and PIL.


Answer: `img.putdata()` returns `None`; it alters the image in place.

Just use:

    
    
    img = Image.new("L", LR_DIM)
    img.putdata(LR[0])
    img.show()
    

