[bugfix] import of VTK library

R/ogs6_vtu.R

@@ -232,8 +232,7 @@ OGS6_vtu <- R6::R6Class(
             }else{
                 # Check class
                 private$.vtkUnstructuredGrid <- value
-                private$.dsa_vtkUnstructuredGrid <-
-                    vtk$numpy_interface$dataset_adapter$WrapDataObject(value)
+                private$.dsa_vtkUnstructuredGrid <- dsa$WrapDataObject(value)
             }
         },
 

R/zzz.R

@@ -3,6 +3,7 @@
 
 # Python vtk library reference
 vtk <- NULL
+dsa <- NULL
 
 .onLoad <- function(libname, pkgname){
 
@@ -30,6 +31,8 @@ vtk <- NULL
 
     # use superassignments to update global Python references
     vtk <<- reticulate::import("vtk", delay_load = TRUE)
+    dsa <<- reticulate::import("vtk.numpy_interface.dataset_adapter",
+                               delay_load = TRUE)
 
     return(invisible())
 }