Make QuadMesh arguments with defaults keyword_only

timhoffm · timhoffm · commit 326576f3540e · 2021-05-16T01:06:34.000+02:00
diff --git a/doc/api/next_api_changes/deprecations/20237-TH.rst b/doc/api/next_api_changes/deprecations/20237-TH.rst
@@ -0,0 +1,4 @@
+QuadMesh keyword only parameters
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+``QuadMesh`` parameters ``antialiased`` and ``shading`` will become
+keyword-only in a future version.
diff --git a/lib/matplotlib/collections.py b/lib/matplotlib/collections.py
@@ -1991,6 +1991,8 @@ class QuadMesh(Collection):
 
     *shading* may be 'flat', or 'gouraud'
     """
+    @_api.make_keyword_only("3.5", "antialiased")
+    # See #20237 for further actions when the deprecation expires
     def __init__(self, meshWidth, meshHeight, coordinates,
                  antialiased=True, shading='flat', **kwargs):
         super().__init__(**kwargs)
