# Development¶

Want to help make Vincent better? Here’s how to get started:

First, fork Vincent on Github. Then clone your fork into a local folder:

$git clone https://github.com/your_username/vincent  Set up your virtualenv: $virtualenv .env


Pip install the dependencies:

$pip install -r requirements.txt  Set up the package for development: $python setup.py develop


Now you’re set. Here are some area where Vincent could use contribution:

## Charts.py¶

Go take a look at charts.py within the main Vincent package and you’ll see that we’re using Vincent to build Vincent! This module is the home for convenience chart builds, such that we can do things like bar = vincent.Bar([10, 20, 30]). This package still needs maps, pie charts, donut charts, treemaps, faceted charts, etc. If you use Vincent to build a new chart, make a pull request for this module. Make sure you add a test with valid grammar to test_charts.py

## Transforms.py¶

There are still a number of Vega Transform types that have yet to be implemented. Start adding them to transforms.py and make a pull request.

## Testing¶

Vincent uses the Nose library for testing, and aims for reasonable test coverage. Take a look at test_charts.py and test_vega.py to get an idea of what our tests look like, and please add coverage for anything you add.