Describe the bug
The transform method of LabelEncoder raises an exception when providing y with a keyword argument.
I mentioned this in discussion #26841 but I am more and more certain this is a bug. And even if it isn't and there is some good reason it fails, the error message is completely unclear since it refers to a parameter that is not present in the method.
Steps/Code to Reproduce
from sklearn.preprocessing import LabelEncoder
le = LabelEncoder().fit_transform(y=[0, 2, 2, 0])
Expected Results
Normal output of the transform method. Same as when calling LabelEncoder().fit_transform([0, 1, 2]) (withoyt y=), which in the above example would be array([0, 1, 1, 0], dtype=int64).
Actual Results
Versions
System:
python: 3.10.9 (tags/v3.10.9:1dd9be6, Dec 6 2022, 20:01:21) [MSC v.1934 64 bit (AMD64)]
executable: C:\repos\dblib\venv\Scripts\python.exe
machine: Windows-10-10.0.22621-SP0
Python dependencies:
sklearn: 1.3.0
pip: 23.2
setuptools: 65.5.1
numpy: 1.25.1
scipy: 1.11.1
Cython: None
pandas: 1.4.4
matplotlib: None
joblib: 1.3.1
threadpoolctl: 3.2.0
Built with OpenMP: True
threadpoolctl info:
user_api: openmp
internal_api: openmp
num_threads: 8
prefix: vcomp
filepath: C:\repos\dblib\venv\Lib\site-packages\sklearn\.libs\vcomp140.dll
version: None
user_api: blas
internal_api: openblas
num_threads: 8
prefix: libopenblas
filepath: C:\repos\dblib\venv\Lib\site-packages\numpy\.libs\libopenblas64__v0.3.23-gcc_10_3_0.dll
version: 0.3.23
threading_layer: pthreads
architecture: SkylakeX
user_api: blas
internal_api: openblas
num_threads: 8
prefix: libopenblas
filepath: C:\repos\dblib\venv\Lib\site-packages\scipy.libs\libopenblas_v0.3.20-571-g3dec11c6-gcc_10_3_0-c2315440d6b6cef5037bad648efc8c59.dll
version: 0.3.21.dev
threading_layer: pthreads
architecture: SkylakeX
Describe the bug
The transform method of LabelEncoder raises an exception when providing
ywith a keyword argument.I mentioned this in discussion #26841 but I am more and more certain this is a bug. And even if it isn't and there is some good reason it fails, the error message is completely unclear since it refers to a parameter that is not present in the method.
Steps/Code to Reproduce
Expected Results
Normal output of the transform method. Same as when calling
LabelEncoder().fit_transform([0, 1, 2])(withoyty=), which in the above example would bearray([0, 1, 1, 0], dtype=int64).Actual Results
Versions
System: python: 3.10.9 (tags/v3.10.9:1dd9be6, Dec 6 2022, 20:01:21) [MSC v.1934 64 bit (AMD64)] executable: C:\repos\dblib\venv\Scripts\python.exe machine: Windows-10-10.0.22621-SP0 Python dependencies: sklearn: 1.3.0 pip: 23.2 setuptools: 65.5.1 numpy: 1.25.1 scipy: 1.11.1 Cython: None pandas: 1.4.4 matplotlib: None joblib: 1.3.1 threadpoolctl: 3.2.0 Built with OpenMP: True threadpoolctl info: user_api: openmp internal_api: openmp num_threads: 8 prefix: vcomp filepath: C:\repos\dblib\venv\Lib\site-packages\sklearn\.libs\vcomp140.dll version: None user_api: blas internal_api: openblas num_threads: 8 prefix: libopenblas filepath: C:\repos\dblib\venv\Lib\site-packages\numpy\.libs\libopenblas64__v0.3.23-gcc_10_3_0.dll version: 0.3.23 threading_layer: pthreads architecture: SkylakeX user_api: blas internal_api: openblas num_threads: 8 prefix: libopenblas filepath: C:\repos\dblib\venv\Lib\site-packages\scipy.libs\libopenblas_v0.3.20-571-g3dec11c6-gcc_10_3_0-c2315440d6b6cef5037bad648efc8c59.dll version: 0.3.21.dev threading_layer: pthreads architecture: SkylakeX