ipython notebook 显示 pil 图像对象

pil.py

from PIL import Image
import requests
from IPython.display import Image as DisplayImage
import io

def get_im_by_url(url):
    r = requests.get(url)
    return Image.open(io.BytesIO(r.content))

def display(im):
    output = io.BytesIO()
    im.save(output, format='JPEG')
    return DisplayImage(data=output.getvalue())

url = 'http://userimg.qunar.com/imgs/201405/17/JhS1_t5BrR7WZerTJnormal.jpg'
im = get_im_by_url(url)
display(im)