New in version 2.0.
Inventory inversion-equivalent diatonic interval-classes:
abjad> for dic in pitchtools.inventory_inversion_equivalent_diatonic_interval_classes():
... dic
...
InversionEquivalentDiatonicIntervalClass('P1')
InversionEquivalentDiatonicIntervalClass('aug1')
InversionEquivalentDiatonicIntervalClass('m2')
InversionEquivalentDiatonicIntervalClass('M2')
InversionEquivalentDiatonicIntervalClass('aug2')
InversionEquivalentDiatonicIntervalClass('dim3')
InversionEquivalentDiatonicIntervalClass('m3')
InversionEquivalentDiatonicIntervalClass('M3')
InversionEquivalentDiatonicIntervalClass('dim4')
InversionEquivalentDiatonicIntervalClass('P4')
InversionEquivalentDiatonicIntervalClass('aug4')
There are 11 inversion-equivalent diatonic interval-classes.
It is an open question as to whether octaves should be included.
Return list of inversion-equivalent diatonic interval-classes.