We already have machine_learning/multilayer_perceptron_classifier.py. However, this file is a how-to that simply uses the scikit-learn built-in multilayer perceptron model (see #6216), so it must be replaced. We welcome you (or any other contributor) to propose a replacement that implements the multilayer perceptron model. If you want to contribute, simply open a PR—we don't assign issues.

I have seen that

Projects asking contributors to submit assorted data structures and algorithms

are excluded from Hacktoberfest
Is this repo still valid for Hacktoberfest ?

CONTRIBUTING.md says:

Do not create an issue to contribute an algorithm. Please submit a pull request instead.