svgpathtools/CONTRIBUTING.md

Contributing to svgpathtools

The following is a few and guidelines regarding the current philosophy, style, flaws, and the future directions of svgpathtools. These guidelines are meant to make it easy to contribute.

Being a Hero

We need better automated testing coverage. Please, submit unittests! See the Testing Style section below for info.

Here's a list of things that need (more) unittests:

• TBA (feel free to help)

Submitting Bugs

If you find a bug, please submit an issue along with an easily reproducible example. Feel free to make a pull-request too (see relevant section below).

Submitting Pull-Requests

New features come with unittests and docstrings.

If you want to add a cool/useful feature to svgpathtools, that's great! Just make sure your pull-request includes both thorough unittests and well-written docstrings. See relevant sections below on "Testing Style" and "Docstring Style" below.

Modifications to old code may require additional unittests.

Certain submodules of svgpathtools are poorly covered by the current set of unittests. That said, most functionality in svgpathtools has been tested quite a bit through use. The point being, if you're working on functionality not currently covered by unittests (and your changes replace more than a few lines), then please include unittests designed to verify that any affected functionary still works.

Style

Coding Style

• Follow the PEP8 guidelines unless you have good reason to violate them (e.g. you want your code's variable names to match some official documentation, or PEP8 guidelines contradict those present in this document).
• Include docstrings and in-line comments where appropriate. See "Docstring Style" section below for more info.
• Use explicit, uncontracted names (e.g. parse_transform instead of parse_trafo). Maybe the most important feature for a name is how easy it is for a user to guess (after having seen other names used in svgpathtools).
• Use a capital 'T' denote a Path object's parameter, use a lower case 't' to denote a Path segment's parameter. See the methods Path.t2T and Path.T2t if you're unsure what I mean. In the ambiguous case, use either 't' or another appropriate option (e.g. "tau").

Testing Style

You want to submit unittests?! Yes! Please see the svgpathtools/test folder for examples.

Docstring Style

All docstrings in svgpathtools should (roughly) adhere to the Google Python Style Guide. Currently, this is not the case... but for the sake of consistency, Google Style is the officially preferred docstring style of svgpathtools.
Some nice examples of Google Python Style docstrings