From f383308c57e2b70c2a32ce0e7b006e7d83d2443c Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Sat, 27 Feb 2021 21:28:38 +1100
Subject: [PATCH] Added IPythonViewer

---
 Tests/test_imageshow.py | 18 +++++++++++++++++-
 src/PIL/ImageShow.py    | 14 ++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/Tests/test_imageshow.py b/Tests/test_imageshow.py
index 78e80f521d6..5981e22c012 100644
--- a/Tests/test_imageshow.py
+++ b/Tests/test_imageshow.py
@@ -62,4 +62,20 @@ def test_viewer():
 
 def test_viewers():
     for viewer in ImageShow._viewers:
-        viewer.get_command("test.jpg")
+        try:
+            viewer.get_command("test.jpg")
+        except NotImplementedError:
+            pass
+
+
+def test_ipythonviewer():
+    pytest.importorskip("IPython", reason="IPython not installed")
+    for viewer in ImageShow._viewers:
+        if isinstance(viewer, ImageShow.IPythonViewer):
+            test_viewer = viewer
+            break
+    else:
+        assert False
+
+    im = hopper()
+    assert test_viewer.show(im) == 1
diff --git a/src/PIL/ImageShow.py b/src/PIL/ImageShow.py
index fceb6537838..f1cf83e33c5 100644
--- a/src/PIL/ImageShow.py
+++ b/src/PIL/ImageShow.py
@@ -114,6 +114,20 @@ def show_file(self, file, **options):
 # --------------------------------------------------------------------
 
 
+class IPythonViewer(Viewer):
+    def show_image(self, image, **options):
+        display(image)
+        return 1
+
+
+try:
+    from IPython.display import display
+except ImportError:
+    pass
+else:
+    register(IPythonViewer)
+
+
 class WindowsViewer(Viewer):
     """The default viewer on Windows is the default system application for PNG files."""