[vtkusers] python: GetNumberOfScalarsInFile identify only one scalar instead of four in binary Legacy vtk

[Jean-Christophe]

Hej,

I have tried to look through the archives of the mailing-list but 
couldn't find an answer to my problem.

A colleague of mine gave me a bunch of binary Legacy vtk files. They are 
structured points with 4 scalars. Here is how I try to read them in python

    import numpy as np
    import vtk

    reader = vtk.vtkStructuredPointReader()
    reader.SetFileName(filename)
    reader.ReadAllScalarsOn()
    reader.Update()
    reader.GetNumberOfScalarsInFile()


When I execute the last command, it returns that there is only one 
single scalar in my file though I actually have four of them. Would 
anyone have an idea of what is going on and how I could fix this?

Regards,
JC
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