Cannot import name 'available_if' from 'sklearn.utils.metaestimators'

Question

While importing "from imblearn.over_sampling import SMOTE", getting import error. Please check and help. I tried upgrading sklearn, but the upgrade was undone with 'OSError'. Firsty installed imbalance-learn through pip.

!pip install -U imbalanced-learn

• Using jupyter notebook

• Windows 10

• sklearn version - 0.24.1

• numpy version - 1.19.5

   --------------------------------------------------------------------------
   ImportError                               Traceback (most recent call last)
  

  in ----> 1 from imblearn.over_sampling import SMOTE

  ~\anaconda3\lib\site-packages\imblearn_init_.py in 35 import types 36 ---> 37 from . import combine 38 from . import ensemble 39 from . import exceptions

  ~\anaconda3\lib\site-packages\imblearn\combine_init_.py in 3 """ 4 ----> 5 from ._smote_enn import SMOTEENN 6 from ._smote_tomek import SMOTETomek 7

  ~\anaconda3\lib\site-packages\imblearn\combine_smote_enn.py in 8 from sklearn.utils import check_X_y 9 ---> 10 from ..base import BaseSampler 11 from ..over_sampling import SMOTE 12 from ..over_sampling.base import BaseOverSampler

  ~\anaconda3\lib\site-packages\imblearn\base.py in 13 from sklearn.utils.multiclass import check_classification_targets 14 ---> 15 from .utils import check_sampling_strategy, check_target_type 16 from .utils._validation import ArraysTransformer 17 from .utils._validation import _deprecate_positional_args

  ~\anaconda3\lib\site-packages\imblearn\utils_init_.py in 5 from ._docstring import Substitution 6 ----> 7 from ._validation import check_neighbors_object 8 from ._validation import check_target_type 9 from ._validation import check_sampling_strategy

  ~\anaconda3\lib\site-packages\imblearn\utils_validation.py in 14 from sklearn.base import clone 15 from sklearn.neighbors._base import KNeighborsMixin ---> 16 from sklearn.neighbors import NearestNeighbors 17 from sklearn.utils import column_or_1d 18 from sklearn.utils.multiclass import type_of_target

  ~\anaconda3\lib\site-packages\sklearn\neighbors_init_.py in 14 from ._nearest_centroid import NearestCentroid 15 from ._kde import KernelDensity ---> 16 from ._lof import LocalOutlierFactor 17 from ._nca import NeighborhoodComponentsAnalysis 18 from ._base import VALID_METRICS, VALID_METRICS_SPARSE

  ~\anaconda3\lib\site-packages\sklearn\neighbors_lof.py in 10 from ..base import OutlierMixin 11 ---> 12 from ..utils.metaestimators import available_if 13 from ..utils.validation import check_is_fitted 14 from ..utils import check_array

  ImportError: cannot import name 'available_if' from 'sklearn.utils.metaestimators' (C:\Users\dks_m\anaconda3\lib\site-packages\sklearn\utils\metaestimators.py)

Answer 1

IF in jupyter , restart the kernel.This fixed!

Answer 2

I believe the issue is with python versioning of scikit-learn. I was able to resolve by reinstalling the Python3 version:

pip uninstall scikit-learn -y

pip3 install scikit-learn 

Remember to restart terminal/notebook after package updates.

This gives me scikit-learn v1.0.2 which resolves error in Python3