Adding pandarallel library

[manuelsh]

Pandarallel allows to execute pandas apply method in parallel, which allows to do data preprocessing faster and easier. This is very helpful in kernel only competitions.

For more information, see:

https://github.com/nalepae/pandarallel

[manuelsh]

@rosbo kindly review and comment if any, please

[rosbo]

Hi,

Thanks @manuelsh for adding this package.

Could you also add a simple test_pandarralel.py test file similar to https://github.com/Kaggle/docker-python/blob/master/tests/test_pandas.py to prevent regression of this package?

You will be able to run your test locally using the following command:

./test -i gcr.io/kaggle-images/python:PR-1005-staging -p test_pandarralel.py

This will run your new test against the image built from this PR with the pandarralel package installed.

Thank you

[manuelsh]

I built and run the test, all good! Thanks

test_pandarallel (test_pandarralel.TestPandarallel) ... ok

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Ran 1 test in 0.089s

OK