Getting error while runnning pytest

[AnkitAhlawat7742]

System details

Darwin AnkitAhawatsMBP 23.4.0 Darwin Kernel Version 23.4.0: Wed Feb 21 21:44:54 PST 2024; root:xnu-10063.101.15~2/RELEASE_ARM64_T6030 arm64

(venv13-ankit) ankitahlawat@AnkitAhlawats-MacBook-Pro pywt % pip install --no-cache-dir .

Processing /Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
Requirement already satisfied: numpy<3,>=1.25 in /Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/venv13-ankit/lib/python3.13/site-packages (from PyWavelets==1.9.0.dev0) (2.2.4)
Building wheels for collected packages: PyWavelets
  Building wheel for PyWavelets (pyproject.toml) ... done
  Created wheel for PyWavelets: filename=pywavelets-1.9.0.dev0-cp313-cp313-macosx_14_0_arm64.whl size=4329963 sha256=e496a22aef91487bcab6e73def0216d26b6d0ac7978ce09c05b20bc933f8836f
  Stored in directory: /private/var/folders/t0/mp5xbrlj599cg_k4m7sxqtnw0000gn/T/pip-ephem-wheel-cache-ncbnui_a/wheels/b5/af/95/8f4692197be3d52049455219f60b607ce89417ac54ee85bd5d
Successfully built PyWavelets
Installing collected packages: PyWavelets
  Attempting uninstall: PyWavelets
    Found existing installation: PyWavelets 1.9.0.dev0
    Uninstalling PyWavelets-1.9.0.dev0:
      Successfully uninstalled PyWavelets-1.9.0.dev0
Successfully installed PyWavelets-1.9.0.dev0

[notice] A new release of pip is available: 24.3.1 -> 25.0.1
[notice] To update, run: pip install --upgrade pip
(venv13-ankit) ankitahlawat@AnkitAhlawats-MacBook-Pro pywt % pytest .
========================================================================== test session starts ===========================================================================
platform darwin -- Python 3.13.1, pytest-8.3.4, pluggy-1.5.0
PySide6 6.8.2.1 -- Qt runtime 6.8.2 -- Qt compiled 6.8.2
rootdir: /Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt
configfile: pytest.ini
plugins: qt-4.4.0, cov-6.0.0, flaky-3.8.1, anyio-4.6.0, timeout-2.3.1, mock-3.14.0, xdist-3.6.1
collected 0 items / 1 error

================================================================================= ERRORS =================================================================================
_________________________________________________________________________ ERROR collecting pywt __________________________________________________________________________
/opt/homebrew/Cellar/python@3.13/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/importlib/__init__.py:88: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
        level      = 0
        name       = 'pywt.conftest'
        package    = None
<frozen importlib._bootstrap>:1387: in _gcd_import
    ???
        level      = 0
        name       = 'pywt.conftest'
        package    = None
<frozen importlib._bootstrap>:1360: in _find_and_load
    ???
        import_    = <function _gcd_import at 0x1029444a0>
        module     = <object object at 0x1028f4060>
        name       = 'pywt.conftest'
<frozen importlib._bootstrap>:1310: in _find_and_load_unlocked
    ???
        import_    = <function _gcd_import at 0x1029444a0>
        name       = 'pywt.conftest'
        parent     = 'pywt'
        parent_spec = None
        path       = None
<frozen importlib._bootstrap>:488: in _call_with_frames_removed
    ???
        args       = ('pywt',)
        f          = <function _gcd_import at 0x1029444a0>
        kwds       = {}
<frozen importlib._bootstrap>:1387: in _gcd_import
    ???
        level      = 0
        name       = 'pywt'
        package    = None
<frozen importlib._bootstrap>:1360: in _find_and_load
    ???
        import_    = <function _gcd_import at 0x1029444a0>
        module     = <object object at 0x1028f4060>
        name       = 'pywt'
<frozen importlib._bootstrap>:1331: in _find_and_load_unlocked
    ???
        import_    = <function _gcd_import at 0x1029444a0>
        name       = 'pywt'
        parent     = ''
        parent_spec = None
        path       = None
        spec       = ModuleSpec(name='pywt', loader=<_frozen_importlib_external.SourceFileLoader object at 0x1060dd430>, origin='/Users/ank.../pywt/__init__.py', submodule_search_locations=['/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt'])
<frozen importlib._bootstrap>:935: in _load_unlocked
    ???
        module     = <module 'pywt' from '/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt/__init__.py'>
        spec       = ModuleSpec(name='pywt', loader=<_frozen_importlib_external.SourceFileLoader object at 0x1060dd430>, origin='/Users/ank.../pywt/__init__.py', submodule_search_locations=['/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt'])
<frozen importlib._bootstrap_external>:1026: in exec_module
    ???
        code       = <code object <module> at 0x104c28220, file "/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt/__init__.py", line 1>
        module     = <module 'pywt' from '/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt/__init__.py'>
        self       = <_frozen_importlib_external.SourceFileLoader object at 0x1060dd430>
<frozen importlib._bootstrap>:488: in _call_with_frames_removed
    ???
        args       = (<code object <module> at 0x104c28220, file "/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt/__ini...uction module.\n', '__file__': '/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt/__init__.py', ...})
        f          = <built-in function exec>
        kwds       = {}
pywt/__init__.py:13: in <module>
    from ._extensions._pywt import *
E   ModuleNotFoundError: No module named 'pywt._extensions._pywt'
        __builtins__ = <builtins>
        __cached__ = '/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt/__pycache__/__init__.cpython-313.pyc'
        __doc__    = '\nDiscrete forward and inverse wavelet transform, stationary wavelet transform,\nwavelet packets signal decomposition and reconstruction module.\n'
        __file__   = '/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt/__init__.py'
        __loader__ = <_frozen_importlib_external.SourceFileLoader object at 0x1060dd430>
        __name__   = 'pywt'
        __package__ = 'pywt'
        __path__   = ['/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt']
        __spec__   = ModuleSpec(name='pywt', loader=<_frozen_importlib_external.SourceFileLoader object at 0x1060dd430>, origin='/Users/ank.../pywt/__init__.py', submodule_search_locations=['/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt'])
        _extensions = <module 'pywt._extensions' from '/Users/ankitahlawat/Desktop/AnkitAhlawat/ModelInformation/pywt/pywt/_extensions/__init__.py'>
======================================================================== short test summary info =========================================================================
ERROR pywt - ModuleNotFoundError: No module named 'pywt._extensions._pywt'
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
============================================================================ 1 error in 0.10s ============================================================================

I tried installing the package using the command pip install --no-cache-dir ., and I also attempted to use python -m build . --wheel followed by installing the package, but the issue persists.

[agriyakhetarpal]

Hi @AnkitAhlawat7742, could you please switch to a different folder when trying to run the tests? As PyWavelets doesn't use the src format for packaging, running pytest in the root directory makes it pick up the pywt folder where extension modules don't exist. You may switch to another folder, say, doc/ and run the tests against the installed version of PyWavelets from there: pytest --pyargs pywt.

In case you're building from source for contributing to PyWavelets, you may use the editable installation using pip install -e . --no-build-isolation (note that you'll need to install the build-time dependencies separately before that: https://pywavelets.readthedocs.io/en/latest/dev/installing_build_dependencies.html). pytest works with editable hooks, so you should be able to run pytest in the root directory if you use an editable installation.

[rgommers]

The question was answered and there is no problem in pywt, so closing.