Remove numpy<2 pins

ci/win_test_installer.cmd

@@ -22,7 +22,7 @@ C:\Python39\python -c "import neuron; neuron.test(); quit()" || set "errorfound=
 C:\Python310\python -c "import neuron; neuron.test(); quit()" || set "errorfound=y"
 C:\Python311\python -c "import neuron; neuron.test(); quit()" || set "errorfound=y"
 :: install numpy dependency
-python -m pip install "numpy<2"
+python -m pip install "numpy"
 :: run also using whatever is system python
 python --version
 python -c "import neuron; neuron.test(); quit()" || set "errorfound=y"

docs/docs_requirements.txt

@@ -10,7 +10,7 @@ bokeh<3
 # do not check import of next line
 ipython
 plotnine
-numpy<2
+numpy
 plotly
 nbsphinx
 jinja2

docs/install/install_instructions.md

@@ -472,24 +472,3 @@ export CFLAGS="-fno-strict-aliasing -fno-common -dynamic -g -Os -pipe -DMACOSX -
 ```
 
 If you see any other issues, please open [an issue here](https://github.com/neuronsimulator/nrn/issues/new/choose).
-
-* **I'm seeing compiler errors related to Python and RXD.***
-The error can manifest as follows:
-```
-share/lib/python/neuron/rxd/geometry3d/surfaces.cpp:14605:41: error: no member named 'subarray' in '_PyArray_Descr'
-    __Pyx_INCREF(((PyObject*)__pyx_v_d->subarray->shape));
-                             ~~~~~~~~~  ^
-```
-often there's something related to NumPy nearby, e.g. `npy`.
-
-The issue is that certain versions of NEURON (9.0 and earlier) are not
-compatible with `numpy>=2`. Check the numpy version, e.g.,
-```
-python -c "import numpy; print(numpy.__version__)"
-```
-
-If it prints `2.0` or higher, try installing an older version:
-```
-pip install "numpy<2"
-```
-(mind the quotes.) Then delete the build directory, reconfigure and compile. If the error persists, carefully check which version of Python NEURON picked up by checking the output of the CMake configure command and make sure that that exact version of Python doesn't pick up an incompatible version of Numpy.

nrn_requirements.txt

@@ -11,5 +11,5 @@ packaging
 pytest<=8.1.1 # potential bug from 8.2.0 due to parallelism?
 pytest-cov
 mpi4py<4 # MUSIC not compatible with MPI 4
-numpy<2
+numpy
 find_libpython

packaging/python/test_wheels.sh

@@ -260,7 +260,7 @@ $python_exe -m pip install --upgrade pip
 # install numpy, pytest and neuron
 # we install setuptools because since python 3.12 it is no more installed
 # by default
-$python_exe -m pip install "numpy<2" pytest setuptools
+$python_exe -m pip install "numpy" pytest setuptools
 $python_exe -m pip install $python_wheel
 $python_exe -m pip show neuron || $python_exe -m pip show neuron-nightly
 

setup.py

@@ -354,7 +354,7 @@ def setup_package():
     NRN_COLLECT_DIRS = ["bin", "lib", "include", "share"]
 
     docs_require = []  # sphinx, themes, etc
-    maybe_rxd_reqs = ["numpy<2", "Cython"] if Components.RX3D else []
+    maybe_rxd_reqs = ["numpy", "Cython"] if Components.RX3D else []
     maybe_docs = docs_require if "docs" in sys.argv else []
     maybe_test_runner = ["pytest-runner"] if "test" in sys.argv else []