Pip Install not working (both on Mac and Windows)

[SeanPedersen]

As the title says pip install ncvis is not working.

I am using a Python 3.11 env with following packages installed:

numpy==1.26.1
Cython==3.0.2
pybind11==2.13.6

Still getting this error:
(ncvis) LeMacMini@Mac-mini-von-The ncvis % pixi add --pypi ncvis

Error:   × failed to solve the pypi requirements of 'default' 'osx-arm64'
  ├─▶ failed to resolve pypi dependencies
  ├─▶ Failed to download and build `ncvis==1.5.13`
  ├─▶ The build backend returned an error
  ╰─▶ Call to `setuptools.build_meta:__legacy__.build_wheel` failed (exit status: 1)

      [stdout]
      numpy/cython/pybind11 are not installed:
      >> pip install numpy cython pybind11

      hint: This usually indicates a problem with the package or the build environment.

Manually importing the packages in Python is working, so no clue what is going on. Any idea?

[WSH032]

I come from here

You need to add these dependencies in the build-system.requires section instead of installing them using pip install.

[SeanPedersen]

Ok thx, I did like so:

./src-tauri/pyproject.toml

[project]
name = "digger-solo"  
version = "0.1.0"
description = "Digger Solo - Search and Explore"
requires-python = ">=3.11"
dependencies = [
     ....
    "ncvis"
]

[project.entry-points.pytauri]
ext_mod = "digger_solo.ext_mod"

[build-system]
requires = ["numpy==1.26.1", "Cython==3.0.2", "pybind11==2.13.6", "setuptools>=61", "setuptools-rust==1.*", "setuptools_scm>=8"]
build-backend = "setuptools.build_meta"

[tool.setuptools.packages]
find = { where = ["python"] }

But still no luck:

LeMacMini@Mac-mini-von-The digger-solo % uv pip install \
    --exact \
    --python="./src-tauri/pyembed/python/bin/python3" \
    --reinstall-package=digger-solo \
    ./src-tauri
Using Python 3.11.11 environment at: src-tauri/pyembed/python
  × Failed to build `ncvis==1.5.13`
  ├─▶ The build backend returned an error
  ╰─▶ Call to `setuptools.build_meta:__legacy__.build_wheel` failed (exit status: 1)

      [stdout]
      numpy/cython/pybind11 are not installed:
      >> pip install numpy cython pybind11

      hint: This usually indicates a problem with the package or the build environment.
  help: `ncvis` (v1.5.13) was included because `digger-solo` (v0.1.0) depends on `ncvis`

[WSH032]

Ah, sorry, I made a mistake. This is an issue that only the author can fix.

These dependencies (numpy etc.) should be added to ncvis's build-system.requires, not downstream.

---

Here is the solution:

uv pip install \
    --python="./src-tauri/pyembed/python/bin/python3" \
    "numpy==1.26.1", "Cython==3.0.2", "pybind11==2.13.6" \
    ./src-tauri

# NOTE: no `--exact`
uv pip install \
    --python="./src-tauri/pyembed/python/bin/python3" \
    --reinstall-package=digger-solo \
    --no-build-isolation-package=ncvis \
    ./src-tauri

[SeanPedersen]

I did not include ncvis as dependency in pyproject.toml... if I do:

LeMacMini@Mac-mini-von-The digger-solo % uv pip install \
    --python="./src-tauri/pyembed/python/bin/python3" \
    "numpy==1.26.1" "Cython==3.0.2" "pybind11==2.13.6" \
    ./src-tauri
Using Python 3.11.11 environment at: src-tauri/pyembed/python
  × Failed to build `ncvis==1.5.13`
  ├─▶ The build backend returned an error
  ╰─▶ Call to `setuptools.build_meta:__legacy__.build_wheel` failed (exit status: 1)

      [stdout]
      numpy/cython/pybind11 are not installed:
      >> pip install numpy cython pybind11

      hint: This usually indicates a problem with the package or the build environment.
  help: `ncvis` (v1.5.13) was included because `digger-solo` (v0.1.0) depends on `ncvis`

So I removed ncvis from pyproject.toml.

I ran:

LeMacMini@Mac-mini-von-The digger-solo % uv pip install \
    --python="./src-tauri/pyembed/python/bin/python3" \
    "numpy==1.26.1" "Cython==3.0.2" "pybind11==2.13.6" \
    ./src-tauri

and:

LeMacMini@Mac-mini-von-The digger-solo % uv pip install \
    --python="./src-tauri/pyembed/python/bin/python3" \
    --reinstall-package=digger-solo \
    --no-build-isolation-package=ncvis \
    ./src-tauri

all worked fine, then I built the package:
...
tauri build --config="src-tauri/tauri.bundle.json" -- --profile bundle-release
But when I start the binary:
ModuleNotFoundError: No module named 'ncvis'

[WSH032]

Ah, another mistake i made. 😅

uv pip install \
    --python="./src-tauri/pyembed/python/bin/python3" \
    "numpy==1.26.1", "Cython==3.0.2", "pybind11==2.13.6"

uv pip install \
    --python="./src-tauri/pyembed/python/bin/python3" \
    --no-build-isolation-package=ncvis \
    ncvis

uv pip install \
    --python="./src-tauri/pyembed/python/bin/python3" \
    --exact \
    --reinstall-package=digger-solo \
    ./src-tauri

So I removed ncvis from pyproject.toml.

You don't need to do that.