Python gets the size and size of remote pictures

This code passes urllib2 Open remote picture , adopt cStringIO Read file contents , The information of the picture file can be read without saving to the disk

#!/usr/bin/env python
encoding=utf-8
import cStringIO, urllib2, Image
url = 'http://com/wp-content/uploads/2012/09/bg.png'
file = urllib2.urlopen(url)
tmpIm = cStringIO.StringIO(file.read())
im = Image.open(tmpIm)
print im.format, im.size, im.mode</pre>