# Using module pynrrd in creation of extension

**URL:** <https://discourse.slicer.org/t/using-module-pynrrd-in-creation-of-extension/27330>\
**Category:** Support\
**Tags:** python, extensions\
**Created:** [January 18, 2023, 5:43pm UTC](https://discourse.slicer.org/t/using-module-pynrrd-in-creation-of-extension/27330 "2023-01-18T17:43:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![devD](https://avatars.discourse-cdn.com/v4/letter/d/f08c70/32.png) [@devD](https://discourse.slicer.org/u/devD)\
**Post date:** [January 18, 2023, 5:43pm UTC](https://discourse.slicer.org/t/using-module-pynrrd-in-creation-of-extension/27330/1 "2023-01-18T17:43:04Z")

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Hi,

I am currently creating an extension for Slicer that uses the model nrrd from pynrrd. However i get the error:  
ModuleNotFoundError: No module named ‘nrrd’

(I installed pynrrd by using “pip install pynrrd”)

What could this depend on and can it be fixed?

Thank you

---

<div class="post-metadata">

**Author:** ![mau\_igna\_06](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mau_igna_06/32/9056_2.png) [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Post date:** [January 18, 2023, 6:30pm UTC](https://discourse.slicer.org/t/using-module-pynrrd-in-creation-of-extension/27330/2 "2023-01-18T18:30:27Z")

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Maybe try:

```auto
import pynrrd

```

Hope it helps