after i pip install infercnvpy , when i run "import infercnvpy" , my ipykernel always dies.

[Gossipforever]

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[grst]

This can have a lot of reasons. You'll need to check you jupyter logs to find out more.

[Gossipforever]

A module that was compiled using NumPy 1.x cannot be run in
NumPy 2.0.2 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.

Traceback (most recent call last):  File "<stdin>", line 1, in <module>
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/infercnvpy/__init__.py", line 5, in <module>
    from . import datasets, io, pl, pp, tl
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/infercnvpy/datasets/__init__.py", line 5, in <module>
    import scanpy as sc
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/scanpy/__init__.py", line 20, in <module>
    from ._utils import check_versions
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/scanpy/_utils/__init__.py", line 27, in <module>
    from anndata import __version__ as anndata_version
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/anndata/__init__.py", line 24, in <module>
    from ._core.anndata import AnnData
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/anndata/_core/anndata.py", line 18, in <module>
    import pandas as pd
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/pandas/__init__.py", line 26, in <module>
    from pandas.compat import (
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/pandas/compat/__init__.py", line 27, in <module>
    from pandas.compat.pyarrow import (
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/pandas/compat/pyarrow.py", line 8, in <module>
    import pyarrow as pa
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/pyarrow/__init__.py", line 65, in <module>
    import pyarrow.lib as _lib
AttributeError: _ARRAY_API not found

A module that was compiled using NumPy 1.x cannot be run in
NumPy 2.0.2 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.

Traceback (most recent call last):  File "<stdin>", line 1, in <module>
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/infercnvpy/__init__.py", line 5, in <module>
    from . import datasets, io, pl, pp, tl
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/infercnvpy/datasets/__init__.py", line 5, in <module>
    import scanpy as sc
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/scanpy/__init__.py", line 20, in <module>
    from ._utils import check_versions
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/scanpy/_utils/__init__.py", line 27, in <module>
    from anndata import __version__ as anndata_version
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/anndata/__init__.py", line 24, in <module>
    from ._core.anndata import AnnData
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/anndata/_core/anndata.py", line 18, in <module>
    import pandas as pd
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/pandas/__init__.py", line 49, in <module>
    from pandas.core.api import (
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/pandas/core/api.py", line 9, in <module>
    from pandas.core.dtypes.dtypes import (
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/pandas/core/dtypes/dtypes.py", line 24, in <module>
    from pandas._libs import (
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/testi/lib/python3.11/site-packages/pyarrow/__init__.py", line 65, in <module>
    import pyarrow.lib as _lib
AttributeError: _ARRAY_API not found``

then the kernel died and restart， i try to change numpy‘s version，and then it has no error but died directly。

[grst]

To me this looks a bit like your conda environment is corrupted, possibly by repeatedly installing new packages into it via pip.

I strongly recommend you start creating separate virtual environments for each project. By using the nb_conda_kernels package, these venvs will appear as different kernels in jupyter lab.

[Bioin-Mixologist]

Changing the installation content might solve the problem.
I encountered similar issues when I installed scanpy, bbknn, and then infercnvpy.
By changing to install only infercnv, the error no longer occurs (only warnings remain).
Here is my installation code:

conda create --name scCNV python=3.10
conda activate scCNV
pip install infercnvpy
conda install ipykernel
pip install ipympl
ipython kernel install --user --name=scCNV-kernel
conda deactivate