notetools.label_notes_in_expr_with_note_indices¶

abjad.tools.notetools.label_notes_in_expr_with_note_indices.label_notes_in_expr_with_note_indices(expr, markup_direction='down')[source]¶

New in version 2.0.

Label notes in expr with note indices:

abjad> staff = Staff("c'8 d'8 r8 r8 g'8 a'8 r8 c''8")

abjad> notetools.label_notes_in_expr_with_note_indices(staff)

abjad> f(staff)
\new Staff {
    c'8 _ \markup { \small 0 }
    d'8 _ \markup { \small 1 }
    r8
    r8
    g'8 _ \markup { \small 2 }
    a'8 _ \markup { \small 3 }
    r8
    c''8 _ \markup { \small 4 }
}

Return none.

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