Recognize image file formats based on their first few bytes.

Functions
		test() test_bmp(h, f) test_gif(h, f) GIF ('87 and '89 variants) test_jpeg(h, f) JPEG data in JFIF format test_pbm(h, f) PBM (portable bitmap) test_pgm(h, f) PGM (portable graymap) test_png(h, f) test_ppm(h, f) PPM (portable pixmap) test_rast(h, f) Sun raster file test_rgb(h, f) SGI image library test_tiff(h, f) TIFF (can be in Motorola or Intel byte order) test_xbm(h, f) X bitmap (X10 or X11) testall(list, recursive, toplevel) what(file, h=None)

Data
		__all__ = ['what'] tests = [<function test_rgb>, <function test_gif>, <function test_pbm>, <function test_pgm>, <function test_ppm>, <function test_tiff>, <function test_rast>, <function test_xbm>, <function test_jpeg>, <function test_bmp>, <function test_png>]