ENH add narwhals as dependency (scikit-learn#31127)

Co-authored-by: Marco Gorelli <33491632+MarcoGorelli@users.noreply.github.com>

Author: lorentzenchr

README.rst

@@ -34,6 +34,7 @@
 .. |NumPyMinVersion| replace:: 1.24.1
 .. |SciPyMinVersion| replace:: 1.10.0
 .. |JoblibMinVersion| replace:: 1.3.0
+.. |NarwhalsMinVersion| replace:: 2.0.1
 .. |ThreadpoolctlMinVersion| replace:: 3.2.0
 .. |MatplotlibMinVersion| replace:: 3.6.1
 .. |Scikit-ImageMinVersion| replace:: 0.22.0
@@ -68,6 +69,7 @@ scikit-learn requires:
 - Python (>= |PythonMinVersion|)
 - NumPy (>= |NumPyMinVersion|)
 - SciPy (>= |SciPyMinVersion|)
+- Narwhals (>= |NarwhalsMinVersion|)
 - joblib (>= |JoblibMinVersion|)
 - threadpoolctl (>= |ThreadpoolctlMinVersion|)
 

asv_benchmarks/asv.conf.json

@@ -70,6 +70,7 @@
         "scipy": ["1.14.0"],
         "cython": ["3.1.2"],
         "joblib": ["1.3.2"],
+        "narwhals": ["2.0.1"],
         "threadpoolctl": ["3.2.0"],
         "pandas": ["2.2.2"]
     },

build_tools/circle/doc_environment.yml

@@ -10,6 +10,7 @@ dependencies:
   - scipy
   - cython
   - joblib
+  - narwhals
   - threadpoolctl
   - matplotlib
   - pandas

build_tools/circle/doc_linux-64_conda.lock

@@ -10,6 +10,7 @@ dependencies:
   - scipy=1.10.0  # min
   - cython=3.1.2  # min
   - joblib
+  - narwhals
   - threadpoolctl
   - matplotlib=3.6.1  # min
   - pyamg=5.0.0  # min

build_tools/circle/doc_min_dependencies_environment.yml

@@ -18,6 +18,8 @@ meson==1.11.1
     # via meson-python
 meson-python==0.19.0
     # via -r build_tools/github/debian_32bit_requirements.txt
+narwhals==2.20.0
+    # via -r build_tools/github/debian_32bit_requirements.txt
 ninja==1.13.0
     # via -r build_tools/github/debian_32bit_requirements.txt
 packaging==26.2

build_tools/circle/doc_min_dependencies_linux-64_conda.lock

@@ -3,6 +3,7 @@
 # build_tools/update_environments_and_lock_files.py
 cython
 joblib
+narwhals
 threadpoolctl
 pytest
 pytest-xdist

build_tools/github/debian_32bit_lock.txt

@@ -11,6 +11,7 @@ dependencies:
   - scipy
   - cython
   - joblib
+  - narwhals
   - threadpoolctl
   - matplotlib
   - pandas