Imputer was deprecated in version 0.20 and will be removed in 0.22. Import impute.SimpleImputer from sklearn instead.

[fenglixa]

/kind bug

What steps did you take and what happened:
[A clear and concise description of what the bug is.]
Following the steps in https://github.com/kubeflow/fairing/tree/master/examples/prediction
Error appeard during import Imputer

sklearn.version
'0.22'
from sklearn.preprocessing import Imputer
Traceback (most recent call last):
File "", line 1, in
ImportError: cannot import name 'Imputer' from 'sklearn.preprocessing' (/Users/fengli/go/src/github.com/kubeflow/venv/lib/python3.8/site-packages/sklearn/preprocessing/init.py)

What did you expect to happen:
No Error

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]
Search from Google, Imputer was deprecated in version 0.20 and will be removed in 0.22. Import impute.SimpleImputer from sklearn instead.

Environment:

• Fairing version: (use python -c "import kubeflow.fairing; print(kubeflow.fairing.__version__)"):
• Kubeflow version: (version number can be found at the bottom left corner of the Kubeflow dashboard):
• Minikube version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

NOTE: If you are using fair from master, please provide us the git commit hash.

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