This is a Heroku buildpack for Python 3 apps with scikit-learn.

We use buildpack-multi and buildpack-apt to install the apt-packages python3-numpy and python3-scipy.

Set your app's buildpack to use buildpack-multi:

$ heroku config:set BUILDPACK_URL=https://github.com/heroku/heroku-buildpack-multi.git 

Let buildpack-multi knows that you will need to use at least the two following buildpacks:

$ echo -e "https://github.com/ddollar/heroku-buildpack-apt\nhttps://github.com/dwnld/heroku-buildpack-python3-sklearn" > .buildpacks 

Create an Aptfile in your project's root directory and add the following apt-packages:

python3-setuptools python3-pip python3-numpy python3-scipy libatlas-dev libatlas3gf-base 

Append scikit-learn to your requirements.txt if you haven't already done so:

echo "scikit-learn" >> requirements.txt 

Add the new files to your repo:

git add .buildpacks Aptfile requirements.txt 

That's it! You should now be able to use scikit-learn on heroku after deployment.

If you are using Python 2.7, I recommend that you use https://github.com/thenovices/heroku-buildpack-scipy