matplotlib
diff --git a/‎lib/matplotlib/colorbar.py
Copy file name to clipboardExpand all lines: lib/matplotlib/colorbar.py
+8Lines changed: 8 additions & 0 deletions b/‎lib/matplotlib/colorbar.py
Copy file name to clipboardExpand all lines: lib/matplotlib/colorbar.py
+8Lines changed: 8 additions & 0 deletions
diff --git a/‎lib/matplotlib/colorizer.py
Copy file name to clipboardExpand all lines: lib/matplotlib/colorizer.py
+1-1Lines changed: 1 addition & 1 deletion b/‎lib/matplotlib/colorizer.py
Copy file name to clipboardExpand all lines: lib/matplotlib/colorizer.py
+1-1Lines changed: 1 addition & 1 deletion
@@ -491,6 +491,14 @@ def update_normal(self, mappable=None):
         and locator will be preserved.
         """
         if mappable:
+            # The mappable keyword argument exists because
+            # ScalarMappable.changed() emits self.callbacks.process('changed', self)
+            # in contrast, ColorizingArtist (and Colorizer) does not use this keyword.
+            # [ColorizingArtist.changed() emits self.callbacks.process('changed')]
+            # Also, there is no test where self.mappable == mappable is not True
+            # and possibly no use case.
+            # Therefore, the mappable keyword can be depreciated if cm.ScalarMappable
+            # is removed.
             self.mappable = mappable
         _log.debug('colorbar update normal %r %r', self.mappable.norm, self.norm)
         self.set_alpha(self.mappable.get_alpha())
 
@@ -29,7 +29,7 @@
     )
 
 
-class Colorizer():
+class Colorizer:
     """
     Class that holds the data to color pipeline
     accessible via `Colorizer.to_rgba(A)` and executed via
Original file line number	Diff line number	Diff line change
`@@ -29,7 +29,7 @@`
`29`	`29`	`)`
`30`	`30`
`31`	`31`
`32`		`-class Colorizer():`
	`32`	`+class Colorizer:`
`33`	`33`	`"""`
`34`	`34`	`Class that holds the data to color pipeline`
`35`	`35`	accessible via `Colorizer.to_rgba(A)` and executed via