New in version 2.5.
List performer names:
abjad> for performer_name in scoretools.list_performer_names():
... performer_name
...
'accordionist'
'baritone'
'bass'
'bassist'
'bassoonist'
'cellist'
'clarinetist'
'contralto'
'flutist'
'guitarist'
'harpist'
'harpsichordist'
'hornist'
'mezzo-soprano'
'oboist'
'percussionist'
'pianist'
'saxophonist'
'soprano'
'tenor'
'trombonist'
'trumpeter'
'tubist'
'vibraphonist'
'violinist'
'violist'
'xylophonist'
Available values for locale are 'en-us' and 'en-uk'.