Added from None to exception

Author: hoxbro

geoviews/util.py

@@ -106,7 +106,7 @@ def project_extents(extents, src_proj, dest_proj, tol=1e-6):
                              'to %s projection. Ensure the coordinate '
                              'reference system (crs) matches your data '
                              'and the kdims.' %
-                             (src_name, dest_name))
+                             (src_name, dest_name)) from None
     else:
         geom_in_crs = boundary_poly.intersection(domain_in_src_proj)
     return geom_in_crs.bounds