# Postprocessing AMRex data using Paraview python scripting

**URL:** https://discourse.paraview.org/t/postprocessing-amrex-data-using-paraview-python-scripting/10650
**Category:** ParaView Support
**Created:** [November 1, 2022, 8:24pm UTC](https://discourse.paraview.org/t/postprocessing-amrex-data-using-paraview-python-scripting/10650 "2022-11-01T20:24:52Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![jstandr](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/j/fbc32d/32.png) [@jstandr](https://discourse.paraview.org/u/jstandr)
#### Post date: [November 1, 2022, 8:24pm UTC](https://discourse.paraview.org/t/postprocessing-amrex-data-using-paraview-python-scripting/10650/1 "2022-11-01T20:24:52Z")

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Hello everyone,

I am a PhD student at Texas A&M University. I am doing CFD and want to do some data post-processing and visualization using paraview. The CFD code I am using (PeleC) is an AMRex code, and doesn’t have a way for me to calculate the flow gradients accurately or access them as calculated by the code.

The post-processing I am looking to do requires the gradients of several flow variables, as well as a matrix inversion at each cell in the flow. I believe doing the computation inside paraview is the best way to go, as I hope to use paraviews gradient filter and numpy for the matrix inversion. However, I am struggling to get access to the data inside the python shell, and I am having a hard time deciphering how paraview scripting works. So far I have the raw AMRex data, as well as the data saved in a pvsm file.

I made a couple of searches and wasn’t able to find anything of this sort in previous questions. I tried following the wiki, but always reached some step where I was missing some attribute after following the same steps. I appreciate any help or advice you guys have for me, or just example scripts- I am not understanding how the data flows or how I can access it/do computations on it so having an example to see what that would look like would be nice.

Thank you.

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### Author: ![Christos\_Tsolakis](https://discourse.paraview.org/user_avatar/discourse.paraview.org/christos_tsolakis/32/4450_2.png) [@Christos\_Tsolakis](https://discourse.paraview.org/u/Christos_Tsolakis)
#### Post date: [November 1, 2022, 9:43pm UTC](https://discourse.paraview.org/t/postprocessing-amrex-data-using-paraview-python-scripting/10650/2 "2022-11-01T21:43:17Z")

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take a look at [https://docs.paraview.org](https://docs.paraview.org) and especially the tutorials section . It should give you a general idea about common workflows.