[[yurttas/PL/SL/python/docs/core-python-programming/doc/16/lib/module-sndhdr.html|]]

[[yurttas/PL/SL/python/docs/core-python-programming/doc/16/lib/mmedia.html|]]

[[yurttas/PL/SL/python/docs/core-python-programming/doc/16/lib/module-rgbimg.html|]]

Python Library Reference

[[yurttas/PL/SL/python/docs/core-python-programming/doc/16/lib/contents.html|]]

[[yurttas/PL/SL/python/docs/core-python-programming/doc/16/lib/genindex.html|]]

Next: 14.10 sndhdr Up: 14. Multimedia Services Previous: 14.8 rgbimg

14.9 `imghdr` -- Determine the type of an image.

The imghdr module determines the type of image contained in a file or byte stream.

The imghdr module defines the following function:

what (filename[, h]): Tests the image data contained in the file named by filename, and returns a string describing the image type. If optional h is provided, the filename is ignored and h is assumed to contain the byte stream to test.

The following image types are recognized, as listed below with the return value from what():

You can extend the list of file types imghdr can recognize by appending to this variable:

tests: A list of functions performing the individual tests. Each function takes two arguments: the byte-stream and an open file-like object. When what() is called with a byte-stream, the file-like object will be None. The test function should return a string describing the image type if the test succeeded, or None if it failed.

Example:

>>> import imghdr
>>> imghdr.what('/tmp/bass.gif')
'gif'