def union(si1, si2):
if si1.alpha == si2.alpha and si1.beta == si2.beta:
bigUnion = SpanningInterval(si1.alpha,
Interval.span(si1.i1, si2.i1),
Interval.span(si1.i2,
si2.i2), si1.beta)
bigUnionNotInSi1 = si1.complement().intersectInterval(bigUnion)
bigUnionNotInSi2 = si2.complement().intersectInterval(bigUnion)
if (all([i.subset(si2) for i in bigUnionNotInSi1])
and all([i.subset(si1) for i in bigUnionNotInSi2])):
return SpanningIntervalSet([bigUnion])
return SpanningIntervalSet([si1, si2])
def testSpan(self):
self.assertEqual(
Interval.span(Interval(OP, 1, 4, OP), Interval(CL, 2, 6, CL)),
Interval(OP, 1, 6, CL))