Portion Library for Python Intervals

The portion library (current version 2.6.1) provides a robust data structure and operations for intervals in Python. It supports various types of intervals (closed, open, finite, semi-infinite) with any comparable objects, including interval sets (disjunctions of atomic intervals). The library offers automatic simplification, comparison, transformation, intersection, union, complement, difference, containment, and discrete iteration, along with a dict-like structure (`IntervalDict`) to map intervals to data. It is actively maintained with regular releases.