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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi David,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Users who mostly use VTK via Python wrapping are sometimes surprised how easily they can crash the application by accessing out-of-bounds elements in arrays.
For example, this crashes an application:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.5pt;font-family:Courier;color:black">>>>
</span><span style="font-size:8.5pt;font-family:Courier;color:#000096">a=vtk.vtkStringArray()</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:8.5pt;font-family:Courier;color:black">>>>
</span><span style="font-size:8.5pt;font-family:Courier;color:#000096">print(a.GetValue(0))<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.5pt;font-family:Courier;color:#000096"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I first thought that it should be handled by documentation and training, but it would be nicer if the wrappers could handle this.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Would it be feasible to add bounds check to VTK array accessors in Python wrappers, so that in case of an out of bounds access, a Python exception would be raised
instead of crashing the application?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Andras<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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