Validation step fails when trying to set WRITEABLE flag to True #29182
Description
Describe the bug
Original issue: kedro-org/kedro#3674
Relates to #28824, #29103, #28899
The example below fails on validation step with ValueError: cannot set WRITEABLE flag to True of this array.
Steps/Code to Reproduce
import pickle
from sklearn.metrics import mean_absolute_error
with open("_data/X_test.pkl", "rb") as fh:
X_test = pickle.load(fh)
with open("_data/y_test.pkl", "rb") as fh:
y_test = pickle.load(fh)
with open("_data/regressor.pickle", "rb") as fh:
regressor = pickle.load(fh)
y_pred = regressor.predict(X_test)
mae = mean_absolute_error(y_test, y_pred)Attaching the contents of _data: _data.zip
Expected Results
No error is thrown.
Actual Results
Traceback (most recent call last):
File "/test_scikit_learn_issue/test.py", line 13, in <module>
mae = mean_absolute_error(y_test, y_pred)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/sklearn/utils/_param_validation.py", line 213, in wrapper
return func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/sklearn/metrics/_regression.py", line 216, in mean_absolute_error
y_type, y_true, y_pred, multioutput = _check_reg_targets(
^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/sklearn/metrics/_regression.py", line 112, in _check_reg_targets
y_true = check_array(y_true, ensure_2d=False, dtype=dtype)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/sklearn/utils/validation.py", line 1107, in check_array
array.flags.writeable = True
^^^^^^^^^^^^^^^^^^^^^
ValueError: cannot set WRITEABLE flag to True of this array
Versions
System:
python: 3.11.9 (main, Apr 19 2024, 11:44:45) [Clang 14.0.6 ]
executable: /bin/python
machine: macOS-10.16-x86_64-i386-64bit
Python dependencies:
sklearn: 1.5.0
pip: 24.0
setuptools: 69.5.1
numpy: 1.26.4
scipy: 1.13.1
Cython: None
pandas: 2.2.2
matplotlib: None
joblib: 1.4.2
threadpoolctl: 3.5.0
Built with OpenMP: True
threadpoolctl info:
user_api: blas
internal_api: openblas
num_threads: 10
prefix: libopenblas
filepath: /lib/python3.11/site-packages/numpy/.dylibs/libopenblas64_.0.dylib
version: 0.3.23.dev
threading_layer: pthreads
architecture: Nehalem
user_api: blas
internal_api: openblas
num_threads: 10
prefix: libopenblas
filepath: /lib/python3.11/site-packages/scipy/.dylibs/libopenblas.0.dylib
version: 0.3.27
threading_layer: pthreads
architecture: Nehalem
user_api: openmp
internal_api: openmp
num_threads: 10
prefix: libomp
filepath: /lib/python3.11/site-packages/sklearn/.dylibs/libomp.dylib
version: None