如何基于Python获取图片的物理尺寸

#! -*- coding: utf-8 -*-
import requests
import io
url = "http://s1.sinaimg.cn/large/001Db1PVzy7qxVQWMjs06"
image = requests.get(url).content
image_b = io.BytesIO(image).read()
size = len(image_b)
print("{} byte\n{} kb\n{} Mb".format(size, size / 1e3, size / 1e6))

75264 byte
75.264 kb
0.075264 Mb