imagefacts discovers the screen dimensions of the commonest image formats from a URL or a bytestring.
Install the latest imagefacts from PyPI:
$ pip install imagefacts # or $ easy_install imagefacts
Use the imagefacts.facts() function to find an image's dimensions:
>>> import imagefacts
>>> imagefacts.facts(open('localfile.jpg').read()) # byte string
('image/jpeg', 1024, 768)
>>> imagefacts.facts(open('localfile.jpg')) # file object
('image/jpeg', 1024, 768)
>>> imagefacts.facts('localfile.jpg') # file name
('image/jpeg', 1024, 768)
>>> imagefacts.facts('http://example.com/image') # URL
('image/png', 400, 476)
>>>
You can also use imagefacts from the command line:
$ python -m imagefacts http://example.com/image
('image/png', 400, 476)
$
Portions of imagefacts are from the feedparser project by Mark Pilgrim and bfg-pages by zutesmog. Thanks!