Root mean square error function in the metric cannot be loaded

[MirandaLv]

Describe the bug

Hi,

I am trying to use the root mean square error function in the metric, but got below error. It was tested on python 3.8.18, with scikit-learn version 1.0.2. Another scikit-learn version of 0.23.1 was tested and had the same issue.

Steps/Code to Reproduce

from sklearn.metrics import root_mean_squared_error

Expected Results

the Root mean square error is imported without any error message.

Actual Results

from sklearn.metrics import root_mean_squared_error
Traceback (most recent call last):
File "", line 1, in
ImportError: cannot import name 'root_mean_squared_error' from 'sklearn.metrics' (/opt/conda/lib/python3.8/site-packages/sklearn/metrics/init.py)

Versions

System:
    python: 3.8.18 (default, Sep 11 2023, 13:40:15)  [GCC 11.2.0]
executable: /opt/conda/bin/python
   machine: Linux-4.15.0-130-generic-x86_64-with-glibc2.17

Python dependencies:
      sklearn: 1.2.2
          pip: 23.2.1
   setuptools: 68.0.0
        numpy: 1.22.4
        scipy: 1.9.1
       Cython: None
       pandas: 2.0.1
   matplotlib: 3.7.1
       joblib: 1.2.0
threadpoolctl: 3.1.0

Built with OpenMP: True

threadpoolctl info:
       user_api: openmp
   internal_api: openmp
         prefix: libgomp
       filepath: /opt/conda/lib/python3.8/site-packages/scikit_learn.libs/libgomp-a34b3233.so.1.0.0
        version: None
    num_threads: 64

       user_api: blas
   internal_api: openblas
         prefix: libopenblas
       filepath: /opt/conda/lib/python3.8/site-packages/numpy.libs/libopenblas64_p-r0-2f7c42d4.3.18.so
        version: 0.3.18
threading_layer: pthreads
   architecture: Zen
    num_threads: 64

       user_api: blas
   internal_api: openblas
         prefix: libopenblas
       filepath: /root/.local/lib/python3.8/site-packages/scipy.libs/libopenblasp-r0-9f9f5dbc.3.18.so
        version: 0.3.18
threading_layer: pthreads
   architecture: Zen
    num_threads: 64

[jeremiedbb]

Hi @MirandaLv, root_mean_squared_error is available since version 1.4, while you have 1.2.2.