numpy 2 error when importing pyaml.accelerator in example

[oscarxblanco]

Dear all,
I get the following error when importing pyaml.accelerator. It seems to be a problem with numpy 2.x.

This is part of the example : /examples/ESRF_ORM_example/correct_orbit.py

>>> from pyaml.accelerator import Accelerator
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/oblanco/Documents/public/progs/pyenv/pyenvat/lib/python3.11/site-packages/pyaml/accelerator.py", line 9, in <module>
    from .arrays.array import ArrayConfig
  File "/home/oblanco/Documents/public/progs/pyenv/pyenvat/lib/python3.11/site-packages/pyaml/arrays/array.py", line 9, in <module>
    from ..common.element_holder import ElementHolder
  File "/home/oblanco/Documents/public/progs/pyenv/pyenvat/lib/python3.11/site-packages/pyaml/common/element_holder.py", line 7, in <module>
    from ..arrays.bpm_array import BPMArray
  File "/home/oblanco/Documents/public/progs/pyenv/pyenvat/lib/python3.11/site-packages/pyaml/arrays/bpm_array.py", line 3, in <module>
    from ..bpm.bpm import BPM
  File "/home/oblanco/Documents/public/progs/pyenv/pyenvat/lib/python3.11/site-packages/pyaml/bpm/bpm.py", line 4, in <module>
    from ..lattice.abstract_impl import RBpmArray, RWBpmOffsetArray, RWBpmTiltScalar
  File "/home/oblanco/Documents/public/progs/pyenv/pyenvat/lib/python3.11/site-packages/pyaml/lattice/abstract_impl.py", line 1, in <module>
    import at
  File "/home/oblanco/Documents/public/progs/pyenv/pyenvat/lib/python3.11/site-packages/at/__init__.py", line 10, in <module>
    from .load import *
  File "/home/oblanco/Documents/public/progs/pyenv/pyenvat/lib/python3.11/site-packages/at/load/__init__.py", line 8, in <module>
    from .matfile import *  # noqa: F401, F403
    ^^^^^^^^^^^^^^^^^^^^^^
  File "/home/oblanco/Documents/public/progs/pyenv/pyenvat/lib/python3.11/site-packages/at/load/matfile.py", line 17, in <module>
    import h5py
  File "/home/oblanco/Documents/public/progs/pyenv/pyenvat/lib/python3.11/site-packages/h5py/__init__.py", line 25, in <module>
    from . import _errors
  File "h5py/_errors.pyx", line 1, in init h5py._errors
ValueError: numpy.dtype size changed, may indicate binary incompatibility. Expected 96 from C header, got 88 from PyObject

Here are my versions:

accelerator-commissioning     0.4.4
accelerator-middle-layer      0.2.3
numpy                         2.3.5

[oscarxblanco]

This error appears when installing pyaml with the tango-pyaml

[kparasch]

this looks like AT-numpy/h5py related rather than tango related to me.

[kparasch]

Could you also put versions of at and h5py?

[oscarxblanco]

I could put the h5py version but it is useless.

We better define a common requirement for numpy on pyaml and pySC. Currently the problem is that one uses numpy 1.x methods and fails with numpy 2.x, while the other requires 2.x and fails because some methods are missing in 1.x.

So, what I propose is that both should support the same numpy versions.

In any case,
h5py 3.9.0
h5py is complaining because numpy is incompatible. I had to downgraded manually to avoid this error, but then other errors appear already reported in separated issues.

[kparasch]

I don't think the h5py version is useless.

h5py support for numpy version 2 was introduced in h5py version 3.11
https://docs.h5py.org/en/latest/whatsnew/3.11.html

which is larger than your version of h5py.

It is true that some examples are incompatible with numpy version 1 but I don't see any pyaml incompatibility with numpy version 2.