# New reader that use read two files using two already existing readers

**URL:** https://discourse.paraview.org/t/new-reader-that-use-read-two-files-using-two-already-existing-readers/10446
**Category:** ParaView Support
**Created:** [October 4, 2022, 11:31am UTC](https://discourse.paraview.org/t/new-reader-that-use-read-two-files-using-two-already-existing-readers/10446 "2022-10-04T11:31:23Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [October 7, 2022, 1:00am UTC](https://discourse.paraview.org/t/new-reader-that-use-read-two-files-using-two-already-existing-readers/10446/6 "2022-10-07T01:00:16Z")

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To read a new format, you need to create a plugin, the simplest way is to use python.

See this answer by @utkarsh.ayachit :

> [@Help on a python programmable filter plugin](https://discourse.paraview.org/t/help-on-a-python-programmable-filter-plugin/2104):
>
> Dear all, I’m trying to write a compiled plugin based on python programmable filter (following the example in [https://www.paraview.org/Wiki/Plugin\_Tutorial:\_Subclassing\_PythonProgrammableFilter](https://www.paraview.org/Wiki/Plugin_Tutorial:_Subclassing_PythonProgrammableFilter) ) to build a reader of a specific hdf5 file. This reader should have a GUI to choose with a slider an item in a numbered set of objects and the min-max of this slider should dinamically be set depending on the input file content. I’ve already written the requestData python script that generates an unst…

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