#20295: Teach imghdr to recognize OpenEXR format images.

Patch by Martin Vignali, test by Claudiu Popa.

Doc/library/imghdr.rst

@@ -50,6 +50,11 @@ from :func:`what`:
 +------------+-----------------------------------+
 | ``'webp'`` | WebP files                        |
 +------------+-----------------------------------+
+| ``'exr'``  | OpenEXR Files                     |
++------------+-----------------------------------+
+
+.. versionadded:: 3.5
+   The *exr* format was added.
 
 .. versionchanged:: 3.5
    The *webp* type was added.

Doc/whatsnew/3.5.rst

@@ -141,6 +141,12 @@ doctest
   *module* contains no docstrings instead of raising :exc:`ValueError`
   (contributed by Glenn Jones in :issue:`15916`).
 
+imghdr
+------
+
+* :func:`~imghdr.what` now recognizes the `OpenEXR <http://www.openexr.com>`_
+  format (contributed by Martin vignali and Cladui Popa in :issue:`20295`).
+
 importlib
 ---------
 

Lib/imghdr.py

@@ -116,6 +116,12 @@ def test_webp(h, f):
 
 tests.append(test_webp)
 
+def test_exr(h, f):
+    if h.startswith(b'\x76\x2f\x31\x01'):
+        return 'exr'
+
+tests.append(test_exr)
+
 #--------------------#
 # Small test program #
 #--------------------#

Lib/test/test_imghdr.py

@@ -18,6 +18,7 @@ TEST_FILES = (
     ('python.tiff', 'tiff'),
     ('python.xbm', 'xbm'),
     ('python.webp', 'webp'),
+    ('python.exr', 'exr'),
 )
 
 class UnseekableIO(io.FileIO):

Misc/NEWS

@@ -103,6 +103,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #20295: imghdr now recognizes OpenEXR format images.
+
 - Issue #21729: Used the "with" statement in the dbm.dumb module to ensure
   files closing.  Patch by Claudiu Popa.