New in version 2.5.
List performer names:
abjad> for pair in scoretools.list_primary_performer_names():
... pair
...
('accordionist', 'acc.')
('baritone', 'baritone')
('bass', 'bass')
('bassist', 'vb.')
('bassoonist', 'bsn.')
('cellist', 'vc.')
('clarinetist', 'cl. in B-flat')
('contralto', 'contralto')
('flutist', 'fl.')
('guitarist', 'gt.')
('harpist', 'hp.')
('harpsichordist', 'hpschd.')
('hornist', 'hn.')
('mezzo-soprano', 'mezzo-soprano')
('oboist', 'ob.')
('pianist', 'pf.')
('saxophonist', 'alto sax.')
('soprano', 'soprano')
('tenor', 'tenor')
('trombonist', 'ten. trb.')
('trumpeter', 'tp.')
('tubist', 'tb.')
('violinist', 'vn.')
('violist', 'va.')
Return list.