fix `from_matplotlib` when Matplotlib colormaps does not provide colors property

supervision/draw/color.py

@@ -352,11 +352,17 @@ class ColorPalette:
         supervision-annotator-examples/visualized_color_palette.png)
         """  # noqa: E501 // docs
         mpl_palette = plt.get_cmap(palette_name, color_count)
-        colors = [
+
+        if hasattr(mpl_palette, 'colors'):
+            colors = mpl_palette.colors
+        else:
+            colors = [mpl_palette(i / (color_count - 1)) for i in range(color_count)]
+
+        return cls([
             Color(int(r * 255), int(g * 255), int(b * 255))
-            for r, g, b, _ in mpl_palette.colors
-        ]
-        return cls(colors)
+            for r, g, b, _
+            in colors
+        ])
 
     def by_idx(self, idx: int) -> Color:
         """