Resolve warning "A NumPy version >=1.16.5 and <1.23.0 is required for this version of SciPy"?

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When I import SciPy or a library dependent on it, I receive the following warning message:

UserWarning: A NumPy version >=1.16.5 and <1.23.0 is required for this version of SciPy (detected version 1.23.1

It's true that I am running NumPy version 1.23.1, however this message is a mystery to me since I am running SciPy version 1.7.3, which, according to SciPy's documentation, is compatible with NumPy <1.24.0.

Anyone having this problem or know how to resolve it?

I am using Conda as an environment manager, and all my packages are up to date as far as I know.

  • python: 3.9.12
  • numpy: 1.23.1
  • scipy: 1.7.3

Thanks in advance if anyone has any clues !

conda scipy numpy python
2 Answers

I have the same issue.

The scipy 1.7.3 docs specifies 1.16.5 <= numpy <1.24.0 while in scipy 1.7.3 code setup.py and __init__.py we have np_maxversion = '1.23.0'.

As I rely on conda channel defaults to setup Intel MKL libraries for numpy and scipy I decided to pin "numpy>=1.22.3,<1.23.0" until a newer scipy is release on conda channel defaults:

conda create -n myenv python "numpy>=1.22.3,<1.23.0" scipy
user_36452540

According to the setup.py file of the scipy 1.7.3, numpy is indeed <1.23.0. As @Libra said, the docs must be incorrect. You can:

  1. Ignore this warning
  2. Use scipy 1.8
  3. Use numpy < 1.23.0

Edit:

This is now fixed in the dev docs of scipy https://scipy.github.io/devdocs/dev/toolchain.html

user_61101600
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