NameError: name 'cross_validation' is not defined

[tmhsa]

I am curious why you have line 8, the import of the definition commented out? This will throw the error if it is not defined.

import math
import csv
import random
import numpy as np
import pandas as pd
import sklearn
from sklearn.ensemble import RandomForestClassifier
#from sklearn import cross_validation, linear_model
from sklearn.model_selection import cross_validate
from sklearn import linear_model
from sklearn.model_selection import cross_val_score
from sklearn.model_selection import train_test_split

The reason is that it throws up this specific error:

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-2-f28d8d77736c> in <module>
      6 import sklearn
      7 from sklearn.ensemble import RandomForestClassifier
----> 8 from sklearn import cross_validation, linear_model
      9 from sklearn.model_selection import cross_validate
     10 from sklearn import linear_model

ImportError: cannot import name 'cross_validation' from 'sklearn' (/anaconda3/lib/python3.7/site-packages/sklearn/__init__.py)

---

Sometimes, the best way to get answers to questions is by asking yourself or rather asking others that may not have the answer.
Here's the solution:

I simply modified the following line:
from:

print(cross_validation.cross_val_score(model, np.array(X), np.array(y), cv=10, scoring='accuracy').mean())

TO:

print(sklearn.model_selection.cross_val_score(model, np.array(X), np.array(y), cv=10, scoring='accuracy').mean())

Specifically, the object cross_validation is deprecated or obsolete(I think) and sklearn.model_selection works now like charm.
Thanks to you all.