Make return value of _get_patch_verts always an array.

anntzer · anntzer · commit ae8931a2d46d · 2021-01-06T07:59:40.000+01:00
... instead of sometimes being a list.  At least the implementation of
bar3d assumes it's always an array (and the only other call site, in
`patch_2d_to_3d`, doesn't care).
diff --git a/lib/mpl_toolkits/mplot3d/art3d.py b/lib/mpl_toolkits/mplot3d/art3d.py
@@ -393,10 +393,7 @@ def _get_patch_verts(patch):
     trans = patch.get_patch_transform()
     path = patch.get_path()
     polygons = path.to_polygons(trans)
-    if len(polygons):
-        return polygons[0]
-    else:
-        return []
+    return polygons[0] if len(polygons) else np.array([])
 
 
 def patch_2d_to_3d(patch, z=0, zdir='z'):
