<?xml version="1.0"?>
<VTKFile type="UnstructuredGrid" version="0.1" byte_order="LittleEndian">
  <UnstructuredGrid>
    <Piece NumberOfPoints="10471" NumberOfCells="64892">
      <PointData>
        <DataArray type="Float64" Name="potential" NumberOfComponents="1" format="appended" offset="0"/>
        <DataArray type="Float64" Name="electric field" NumberOfComponents="3" format="appended" offset="83772"/>
      </PointData>
      <CellData>
        <DataArray type="Int32" Name="GeometryIds" format="appended" offset="335080"/>
      </CellData>
      <Points>
        <DataArray type="Float64" NumberOfComponents="3" format="appended" offset="594652"/>
      </Points>
      <Cells>
        <DataArray type="Int32" Name="connectivity" format="appended" offset="845960"/>
        <DataArray type="Int32" Name="offsets" format="appended" offset="1865068"/>
        <DataArray type="Int32" Name="types" format="appended" offset="2124640"/>
      </Cells>
    </Piece>
  </UnstructuredGrid>
<AppendedData encoding="raw">

import numpy
from vtk import vtkUnstructuredGridReader
from vtk.util import numpy_support as VN
reader = vtkUnstructuredGridReader()
reader.SetFileName("charged_wire.vtu")
reader.ReadAllVectorsOn()
reader.ReadAllScalarsOn()
reader.Update()
data = reader.GetOutput()
potential = data.GetPointData().GetScalars("potential")
print(type(potential))