Issue #20197: Added support for the WebP image type in the imghdr module.

Patch by Fabrice Aneche and Claudiu Popa.

Doc/library/imghdr.rst

@@ -48,6 +48,11 @@ from :func:`what`:
 +------------+-----------------------------------+
 | ``'png'``  | Portable Network Graphics         |
 +------------+-----------------------------------+
+| ``'webp'`` | WebP files                        |
++------------+-----------------------------------+
+
+.. versionchanged:: 3.5
+   The *webp* type was added.
 
 You can extend the list of file types :mod:`imghdr` can recognize by appending
 to this variable:

Lib/imghdr.py

@@ -110,6 +110,12 @@ def test_bmp(h, f):
 
 tests.append(test_bmp)
 
+def test_webp(h, f):
+    if h.startswith(b'RIFF') and h[8:12] == b'WEBP':
+        return 'webp'
+
+tests.append(test_webp)
+
 #--------------------#
 # Small test program #
 #--------------------#

Lib/test/test_imghdr.py

@@ -16,7 +16,8 @@ TEST_FILES = (
     ('python.ras', 'rast'),
     ('python.sgi', 'rgb'),
     ('python.tiff', 'tiff'),
-    ('python.xbm', 'xbm')
+    ('python.xbm', 'xbm'),
+    ('python.webp', 'webp'),
 )
 
 class UnseekableIO(io.FileIO):

Misc/ACKS

@@ -42,6 +42,7 @@ Pehr Anderson
 Erik Andersén
 Oliver Andrich
 Ross Andrus
+Fabrice Aneche
 Juancarlo Añez
 Chris Angelico
 Jérémy Anger

Misc/NEWS

@@ -89,6 +89,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #20197: Added support for the WebP image type in the imghdr module.
+  Patch by Fabrice Aneche and Claudiu Popa.
+
 - Issue #21513: Speedup some properties of IP addresses (IPv4Address,
   IPv6Address) such as .is_private or .is_multicast.