Add changed callback after setting norm values

ksunden · ksunden · commit e908ac1344fd · 2023-09-05T12:11:20.000-05:00
diff --git a/lib/matplotlib/contour.py b/lib/matplotlib/contour.py
@@ -892,7 +892,8 @@ def __init__(self, ax, *args,
                 self.norm.vmin = vmin
             if vmax is not None:
                 self.norm.vmax = vmax
-            self._process_colors()
+        self.norm._changed()
+        self._process_colors()
 
         if self._paths is None:
             self._paths = self._make_paths_from_contour_generator()
