This package provides a collection that is basically a “dict of sets”, named MetaSet.
Links
Package on PyPI: http://pypi.python.org/pypi/metaset/
Source on GitHub: http://github.com/Polyconseil/metaset/
Build on Travis CI: http://travis-ci.org/lionel-panhaleux/metaset/
Quickstart
Install the package from PyPI, using pip:
Or from GitHub:
Import it in your code:
Usage is quite straight forward, basic set operations are supported via the binary operators + - | ^.
Detailed considerations
They are two ways to consider the “dict of sets” notion, differing on how you handle the empty values for keys.
The easiest idea is to consider that a key with no content is non-existent. This is how the dictset package is implemented.
In this alternative implementation, we chose to keep the empty keys as meaningful elements, allowing for smart unions and intersections.
So, beware of how empty-keys are handled, and consider using dictset if it is a better match for your use case. The behavior for subtraction and symmetric difference, although sound on a mathematical point of view, may not be what you want.
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