def test_simple_interval(self):
int_interval = Interval(5, 9)
assert int_interval.contains(7)
assert int_interval.contains(6)
assert Interval.intersects(int_interval, Interval(7, 10))
assert int_interval.intersection(Interval(7, 10)) == Interval(
7, 9).intersection(int_interval)
def sub_hct(self, sub_track_interval=None):
"""
Take a sub_track of this hct.
:param sub_track_interval: NmericInterval. If none, the entire hct.
:return:
"""
sub_track_interval = NumericInterval(Fraction(0), self.duration.duration) if sub_track_interval is None else \
sub_track_interval
new_track = HarmonicContextTrack()
for hc in self.hc_list():
hc_interval = NumericInterval(
hc.position.position,
hc.position.position + hc.duration.duration)
hc_intersect = hc_interval.intersection(sub_track_interval)
if hc_intersect is not None:
new_hc = HarmonicContext(hc.tonality, hc.chord,
Duration(hc_intersect.length()),
Position(hc_intersect.lower))
new_track.append(new_hc)
return new_track
