home-assistant.io/source/developers/development_environment.markdown

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---
layout: page
title: "Setup Development Environment"
description: "Setup your environment to start developing for Home Assistant."
date: 2014-12-21 13:32
sidebar: true
comments: false
sharing: true
footer: true
---
You'll need to set up a development environment if you want to develop a new feature or component for Home Assistant. Read on to learn how to set up.
1. Visit the [the Home Assistant repository](https://github.com/home-assistant/home-assistant) and click "fork."
* Consider setting up a virtual environment using [`venv`](https://docs.python.org/3.4/library/venv.html) before running the setup script.
```bash
$ git clone https://github.com/YOUR_GIT_USERNAME/home-assistant.git
$ cd home-assistant
$ git remote add upstream https://github.com/home-assistant/home-assistant.git
$ script/setup
```
* On Windows, you can use `python setup.py develop` instead of the setup script.
2. Run `hass` to invoke your local installation.
### Developing on Windows
If you are using Windows as a development platform, make sure that you have the correct Microsoft Visual C++ build tools installed. Check the [Windows Compilers](https://wiki.python.org/moin/WindowsCompilers) section on the [Python website](https://www.python.org/) for details. Validation using `tox` will fail if this is not done correctly.
Also, make sure to install or upgrade the `Setuptools` Python package -- it contains compatibility improvements and adds automatic use of compilers:
```bash
pip install --upgrade setuptools
```