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windows 11 with python 3.14 support #1160

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@jdfoxito

tengo el error al instalar la libreria

Collecting opencv-python
Downloading opencv_python-4.12.0.88-cp37-abi3-win_amd64.whl.metadata (19 kB)
Collecting numpy<2.3.0,>=2 (from opencv-python)
Downloading numpy-2.2.6.tar.gz (20.3 MB)
---------------------------------------- 20.3/20.3 MB 21.8 MB/s 0:00:01
Installing build dependencies ... done
Getting requirements to build wheel ... done
Installing backend dependencies ... done
Preparing metadata (pyproject.toml) ... error
error: subprocess-exited-with-error

× Preparing metadata (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [49 lines of output]
Traceback (most recent call last):
File "D:\softapps\pyjdfx\Lib\site-packages\pip_vendor\pyproject_hooks_in_process_in_process.py", line 389, in
main()
~~~~^^
File "D:\softapps\pyjdfx\Lib\site-packages\pip_vendor\pyproject_hooks_in_process_in_process.py", line 373, in main
json_out["return_val"] = hook(**hook_input["kwargs"])
~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\softapps\pyjdfx\Lib\site-packages\pip_vendor\pyproject_hooks_in_process_in_process.py", line 178, in prepare_metadata_for_build_wheel
whl_basename = backend.build_wheel(metadata_directory, config_settings)
File "C:\Users\pythouser\AppData\Local\Temp\pip-build-env-bdkdpomy\overlay\Lib\site-packages\mesonpy_init_.py", line 1144, in wrapper
return func(*args, **kwargs)
File "C:\Users\pythouser\AppData\Local\Temp\pip-build-env-bdkdpomy\overlay\Lib\site-packages\mesonpy_init_.py", line 1197, in build_wheel
with project(config_settings) as project:
~~~~~~~~^^^^^^^^^^^^^^^^^
File "D:\softapps\pyjdfx\Lib\contextlib.py", line 141, in enter
return next(self.gen)
File "C:\Users\pythouser\AppData\Local\Temp\pip-build-env-bdkdpomy\overlay\Lib\site-packages\mesonpy_init
.py", line 1063, in project
yield Project(source_dir, build_dir, meson_args, editable_verbose)
~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\pythouser\AppData\Local\Temp\pip-build-env-bdkdpomy\overlay\Lib\site-packages\mesonpy_init
.py", line 675, in init
self._ninja = env_ninja_command()
~~~~~~~~~~~~~~~~~~^^
File "C:\Users\pythouser\AppData\Local\Temp\pip-build-env-bdkdpomy\overlay\Lib\site-packages\mesonpy_init
.py", line 1121, in _env_ninja_command
version = subprocess.run([ninja_path, '--version'], check=False, text=True, capture_output=True).stdout
~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\softapps\pyjdfx\Lib\subprocess.py", line 554, in run
with Popen(*popenargs, **kwargs) as process:
~~~~~^^^^^^^^^^^^^^^^^^^^^^
File "D:\softapps\pyjdfx\Lib\subprocess.py", line 1038, in init
self._execute_child(args, executable, preexec_fn, close_fds,
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pass_fds, cwd, env,
^^^^^^^^^^^^^^^^^^^
...<5 lines>...
gid, gids, uid, umask,
^^^^^^^^^^^^^^^^^^^^^^
start_new_session, process_group)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\softapps\pyjdfx\Lib\subprocess.py", line 1552, in _execute_child
hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
# no special security
^^^^^^^^^^^^^^^^^^^^^
...<4 lines>...
cwd,
^^^^
startupinfo)
^^^^^^^^^^^^
PermissionError: [WinError 5] Acceso denegado
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> numpy

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

Activity

  1. Satyamgupta2365 commented on Feb 2, 2026

    @Satyamgupta2365

    @jdfoxito This looks like a Python 3.14 compatibility problem on Windows.
    opencv-python wheels are not yet built for Python 3.14, so pip falls back to building numpy from source, which fails (ninja / WinError 5).
    Workaround: use Python 3.12 or 3.13 on Windows, or wait for official 3.14 wheels.
    Installing a prebuilt NumPy wheel or running pip with proper build tools/admin rights may also help.

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