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#!/bin/python3
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import unittest
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class RangeSet:
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def __init__(self, rangespec):
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self.ranges = self.parse_spec(rangespec)
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def __contains__(self, num):
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return any(num in r for r in self.ranges)
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def parse_spec(self, spec: str) -> list[range]:
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result = []
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parts = spec.split(',')
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parts = map(str.strip, parts)
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for part in parts:
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if '-' in part:
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start, end = part.split('-')
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result.append(range(int(start), int(end)+1))
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else:
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n = int(part)
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result.append(range(n, n+1))
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return result
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# TODO: iteration. Will require deduplication.
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# TODO: simplification of inner ranges
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# TODO: Set operations: union, intersection, difference?
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# TODO: Comparison to classic range objects (only to check that it represents the same numbers)
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class TestRangeSetBasic(unittest.TestCase):
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def test_number_sequence(self):
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rs = RangeSet('1,3,4,5')
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for x in [1,3,4,5]:
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self.assertIn(x, rs)
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self.assertNotIn(2, rs)
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if __name__ == '__main__':
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print('This is a library. Runing the testsuite instead.')
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unittest.main()
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