Python docs PyPI optional dependencies example broken

[cdeil]

Checks

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pixi, using pixi --version.

Reproducible example

On MacOS follow the tutorial at https://pixi.sh/dev/tutorials/python except use quotes since zsh requires this.

pixi add 'black[cli]' --pypi

Issue description

$ pixi add 'black[cli]' --pypi
 WARN The feature 'test' is defined but not used in any environment
✔ Added black[cli]
Added these as pypi-dependencies.

Expected behavior

As stated in the docs and printed on the console, the black[cli] should be listed as dependency including the [cli] part.

However it remains without that part:

dependencies = ["black"]

[cdeil]

This is not what I see when I follow the tutorial page:

Also this is not what I see: https://pixi.sh/dev/tutorials/python/#installation-pixi-install

For me the default env was created much earlier and test is not an env but an unused feature.

At that point in the tutorial I get this:

(base) pix $ pixi install -e test
 WARN The feature 'test' is defined but not used in any environment
  × unknown environment 'test'

Did I make a mistake? Or did the way pixi work change and the docs need an update?

[cdeil]

@ruben-arts - I see you are working on this in #1856 .

Trying do adopt pixi for one of our projects I ran into this error.

Just mentioning it here in this one since probably that's just another manifestation of brackets not working properly yet?

(base) hpred $ pixi init --import environment-py12.yml
  × invalid bracket

(base) hpred $ pixi --version
pixi 0.27.1

(base) hpred $ cat environment-py12.yml 
name: hpred12
channels:
  - nodefaults
  - conda-forge
dependencies:
  - python=3.12
  - pandas[performance]
  - scikit-learn
  - numpy

  - sqlalchemy
  - psycopg
  - pymssql

  # data files
  - pyarrow   # Parquet
  - openpyxl  # Excel

  # ML
  - ruptures
  - category_encoders
  - ppscore
  - dill
  - imbalanced-learn
  - scikit-lego

  # local dev
  - pre-commit # Also for CI
  - jupyterlab
  - alembic

  # viz
  - matplotlib
  - seaborn
  - bokeh
  - hiplot
  - shap
  - ipywidgets

  # Panel apps
  - panel
  - param
  - pyinstrument
  - tabulate
  - python-duckdb
  - duckdb-cli
  - click
  - nbconvert
  - missingno

  # testing
  - pytest
  - pytest-mock
  - pytest-cov
  - pytest-postgresql

  - pip
  - pip:
    # data
    - sqlalchemy-json

    # Azure
    - azure-core
    - azure-identity
    - azure-keyvault-secrets
    - azure-storage-blob
    - azure-kusto-data[pandas]  # ADX
    - opencensus-ext-azure  # Azure Application Insights

    # app
    - schedule
    - pytest-playwright

    # local DS
    - dvc[azure]

    # Panel
    - pyjwt
    - typing-extensions