How do I handle Import Errors?

I got this error when trying to run a python file with:

from sklearn.model_selection import train_test_split

The error is:

ImportError: cannot import name 'ThreadPool' from 'multiprocessing.pool' (/usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/multiprocessing/pool.py)

However, when I execute the same line from the terminal as:

>>> from sklearn.model_selection import train_test_split

it works without any error.

Any idea what might cause this error? and how to fix it?