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Slycot Numpy 2.0 warning #241

Description

@tompkins-ct

Issue

The following warning is raised when using python-control:

Traceback (most recent call last):  File "./single_zone_temperature_controller.py", line 1, in <module>
    import control as ct
  File "/.venv/lib/python3.12/site-packages/control/__init__.py", line 77, in <module>
    from .statesp import *
  File "/.venv/lib/python3.12/site-packages/control/statesp.py", line 75, in <module>
    from slycot import ab13dd
  File "/.venv/lib/python3.12/site-packages/slycot/__init__.py", line 31, in <module>
    from .analysis import (ab01nd,
  File "/.venv/lib/python3.12/site-packages/slycot/analysis.py", line 22, in <module>
    from . import _wrapper
Traceback (most recent call last):
  File "/.venv/lib/python3.12/site-packages/numpy/core/_multiarray_umath.py", line 44, in __getattr__
    raise ImportError(msg)
ImportError: 
A module that was compiled using NumPy 1.x cannot be run in
NumPy 2.1.3 as it may crash. To support both 1.x and 2.x
versions of NumPy, modules must be compiled with NumPy 2.0.
Some module may need to rebuild instead e.g. with 'pybind11>=2.12'.

If you are a user of the module, the easiest solution will be to
downgrade to 'numpy<2' or try to upgrade the affected module.
We expect that some modules will need time to support NumPy 2.

System

  • MacOS 15.1.1
  • Python 3.12.2
  • slycot 0.6.0
  • control 0.10.1
  • numpy 2.1.3

Activity

  1. murrayrm commented on Dec 12, 2024

    @murrayrm
    Member

    How are you installing Slycot? See #240 if you are using pip.

  2. bnavigator commented on Dec 23, 2024

    @bnavigator
    Collaborator

    We do not publish compiled Slycot wheels. Conda-forge has Slycot compiled with NumPy 2.

    Reinstall Slycot, if you see this failure. Make sure to not use an old cache.

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