Python Standard Library

The imghdr Module

The imghdr module identifies different image file formats. The current version identifies bmp, gif, jpeg, pbm, pgm, png, ppm, rast (Sun raster), rgb (SGI), tiff, and xbm images. Example 9-1 demonstrates.

Example 9-1. Using the imghdr Module

File: imghdr-example-1.py

import imghdr

result = imghdr.what("samples/sample.jpg")

if result:
    print "file format:", result
else:
    print "cannot identify file"

file format: jpeg

import Image

im = Image.open("samples/sample.jpg")
print im.format, im.mode, im.size