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Convenience functions for multiple range-like objects

Project description

Convenience functions for multiple range-like objects

An elementary package for Python >= 3.3

https://pypi.python.org/pypi/multirange/

Status

The code works, but it is not stable: functionality might be added or reorganized as long as the major version equals 0 (cf. http://semver.org/spec/v2.0.0.html, item #4). Hint: Stability grows quicker when you provide feedback.

multirange is not yet feature complete; most operations involving multiranges are missing.

Introduction

This library for Python >= 3.3 provides convenience functions for multiple range-like objects (corresponding to finite sets of consecutive integers).

It has 3 types of operations:

  • operations involving few range objects
  • operations involving an iterable of range objects (range iterable)
  • operations involving so-called multiranges; we define a multirange as an iterable of ranges, which have no mutual overlap, which are not adjacent, and which are ordered increasingly

Examples

>>> import multirange as mr
>>> mr.normalize(range(5, 0))
>>> mr.overlap(range(0, 10), range(5, 15))
range(5, 10)
>>> mr.is_disjunct([range(8, 10), range(0, 2), range(2, 4)])
True
>>> mr.covering_all([range(8, 10), range(0, 2), range(2, 4)])
range(0, 10)
>>> mr.contains(range(0, 10), range(0, 5))
True
>>> mr.is_covered_by([range(8, 10), range(0, 2)], range(0, 20))
True
>>> mr.intermediate(range(10, 15), range(0, 5))
range(5, 10)
>>> list(mr.gaps([range(4, 6), range(6, 7), range(8, 10), range(0, 3)]))
[range(3, 4), range(7, 8)]
>>> mr.difference(range(1, 9), range(2, 3))
(range(1, 2), range(3, 9))
>>> list(mr.normalize_multi([None, range(0, 5), range(5, 7), range(8, 20)]))
[range(0, 7), range(8, 20)]
>>> list(mr.difference_one_multi(range(0, 10), [range(-2, 2), range(4, 5)]))
[range(2, 4), range(5, 10)]

Please consult the unit tests for more examples.

See also

If multirange is not what you are searching for, you might be interested in one of these python modules:

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