Schediazo is a vector drawing package in Python which writes to SVG files. There are other SVG writers/readers, for example Orsinium-labs/svg.py but I already had my own SVG code and routines that did additional vector drawing tasks, for example to align drawing objects or to fit Bezier curves (not yet included) so this repo exists mainly for my own use. I've also used it as an exercise in type hinting and multiple inheritance.

The word Schediazo is related to the Greek word for drawing.

This package includes a 2D alignment facility that can align edges of parts via rotation and translation. This is performed by solving Wahba's problem by finding (through gradient descent minimisation) the rotation that provides a consistent translation and then solving for the translation.

A specific facility that is used is that since SVG uses Painter's algorithm for drawing, we need to be able to order the elements in a drawing. This package uses a re-implementation and extension of OrderedDict for all drawing parts that can contain other parts. For example, an SVG group (g) tag can contain a set of renderable shapes and we want to be able to control this. The PartDict base class is similar to an OrderedDict in that it is a dictionary that retains memory about the insertion order but this order can be manipulated at will. Parts can be moved forwards, backwards, to the front, to the back arbitrarily, but still retrieved using a key as a standard dictionary.

To install schediazo use pip.

pip install .

or to install in editable mode:

pip install --editable .