# How to save data within a jitted function

**URL:** <https://numba.discourse.group/t/how-to-save-data-within-a-jitted-function/2007>\
**Category:** Support: How do I do ...?\
**Created:** [June 30, 2023, 10:06am UTC](https://numba.discourse.group/t/how-to-save-data-within-a-jitted-function/2007 "2023-06-30T10:06:41Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![gorkamunoz](https://yyz2.discourse-cdn.com/free1/user_avatar/numba.discourse.group/gorkamunoz/32/857_2.png) [@gorkamunoz](https://numba.discourse.group/u/gorkamunoz)\
**Post date:** [June 30, 2023, 10:06am UTC](https://numba.discourse.group/t/how-to-save-data-within-a-jitted-function/2007/1 "2023-06-30T10:06:41Z")

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Hi, I want to save some data (e.g. a np.array) inside a jitted function / class. I have seen that np.save is not yet supported nor is the native python way of saving (e.g. file = open(…); file.write…) as File I/O will fallback to python.

Is there another way of saving a np.array into a file?

Thanks!

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**Author:** ![esc](https://yyz2.discourse-cdn.com/free1/user_avatar/numba.discourse.group/esc/32/49_2.png) [@esc](https://numba.discourse.group/u/esc)\
**Post date:** [June 30, 2023, 1:13pm UTC](https://numba.discourse.group/t/how-to-save-data-within-a-jitted-function/2007/2 "2023-06-30T13:13:21Z")

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You can use an object mode block:

[https://numba.readthedocs.io/en/stable/user/withobjmode.html](https://numba.readthedocs.io/en/stable/user/withobjmode.html)

You can call no.save inside that block.