matplotlib
diff --git a/‎lib/matplotlib/artist.py
Copy file name to clipboardExpand all lines: lib/matplotlib/artist.py
+5-18Lines changed: 5 additions & 18 deletions b/‎lib/matplotlib/artist.py
Copy file name to clipboardExpand all lines: lib/matplotlib/artist.py
+5-18Lines changed: 5 additions & 18 deletions
diff --git a/‎lib/matplotlib/collections.py
Copy file name to clipboardExpand all lines: lib/matplotlib/collections.py
+2-1Lines changed: 2 additions & 1 deletion b/‎lib/matplotlib/collections.py
Copy file name to clipboardExpand all lines: lib/matplotlib/collections.py
+2-1Lines changed: 2 additions & 1 deletion
diff --git a/‎lib/matplotlib/colorizer.py
Copy file name to clipboardExpand all lines: lib/matplotlib/colorizer.py
+16Lines changed: 16 additions & 0 deletions b/‎lib/matplotlib/colorizer.py
Copy file name to clipboardExpand all lines: lib/matplotlib/colorizer.py
+16Lines changed: 16 additions & 0 deletions
diff --git a/‎lib/matplotlib/image.py
Copy file name to clipboardExpand all lines: lib/matplotlib/image.py
+1-1Lines changed: 1 addition & 1 deletion b/‎lib/matplotlib/image.py
Copy file name to clipboardExpand all lines: lib/matplotlib/image.py
+1-1Lines changed: 1 addition & 1 deletion
@@ -1420,33 +1420,20 @@ def set_mouseover(self, mouseover):
 
 
 class ColorizingArtist(Artist):
-    def __init__(self, norm=None, cmap=None):
+    def __init__(self, colorizer):
         """
         Parameters
         ----------
-        norm : `colors.Normalize` (or subclass thereof) or str or `cm.Colorizer` or None
-            The normalizing object which scales data, typically into the
-            interval ``[0, 1]``.
-            If a `str`, a `colors.Normalize` subclass is dynamically generated based
-            on the scale with the corresponding name.
-            If `cm.Colorizer`, the norm an colormap on the `cm.Colorizer` will be used
-            If *None*, *norm* defaults to a *colors.Normalize* object which
-            initializes its scaling based on the first data processed.
-        cmap : str or `~matplotlib.colors.Colormap`
-            The colormap used to map normalized data values to RGBA colors.
+        colorizer : `colorizer.Colorizer`
         """
+        if not isinstance(colorizer, Colorizer):
+            raise ValueError("A `mpl.colorizer.Colorizer` object must be provided")
 
         Artist.__init__(self)
 
         self._A = None
-        if isinstance(norm, Colorizer):
-            self.colorizer = norm
-            if cmap:
-                raise ValueError("Providing a `cm.Colorizer` as the norm while "
-                                 "at the same time as a `cmap` is not supported..")
-        else:
-            self.colorizer = Colorizer(cmap, norm)
 
+        self.colorizer = colorizer
         self._id_colorizer = self.colorizer.callbacks.connect('changed', self.changed)
         self.callbacks = cbook.CallbackRegistry(signals=["changed"])
 
 
@@ -155,7 +155,8 @@ def __init__(self, *,
             Remaining keyword arguments will be used to set properties as
             ``Collection.set_{key}(val)`` for each key-value pair in *kwargs*.
         """
-        artist.ColorizingArtist.__init__(self, norm, cmap)
+
+        artist.ColorizingArtist.__init__(self, colorizer._get_colorizer(cmap, norm))
         # list of un-scaled dash patterns
         # this is needed scaling the dash pattern by linewidth
         self._us_linestyles = [(0, None)]
 
@@ -299,6 +299,22 @@ def clip(self, clip):
         self.norm.clip = clip
 
 
+def _get_colorizer(cmap, norm):
+    """
+    Passes or creates a Colorizer object.
+
+    Allows users to pass a Colorizer as the norm keyword
+    where a artist.ColorizingArtist is used as the artist.
+    If a Colorizer object is not passed, a Colorizer is created.
+    """
+    if isinstance(norm, Colorizer):
+        if cmap:
+            raise ValueError("Providing a `cm.Colorizer` as the norm while "
+                             "at the same time providing a `cmap` is not supported.")
+        return norm
+    return Colorizer(cmap, norm)
+
+
 class ColorizerShim:
 
     def _scale_norm(self, norm, vmin, vmax):
 
@@ -258,7 +258,7 @@ def __init__(self, ax,
                  interpolation_stage=None,
                  **kwargs
                  ):
-        martist.ColorizingArtist.__init__(self, norm, cmap)
+        martist.ColorizingArtist.__init__(self, colorizer._get_colorizer(cmap, norm))
         if origin is None:
             origin = mpl.rcParams['image.origin']
         _api.check_in_list(["upper", "lower"], origin=origin)