def label_sections_in_treble_in_blue(treble, section_lengths):
treble_sections = sequencetools.partition_by_lengths(
treble[:], section_lengths, cyclic = True)
for section_index, treble_section in enumerate(treble_sections):
section_number = section_index + 1
if 1 < len(treble_section):
treble_leaves = list(iterate.naive(treble_section, _Leaf))
bracket = Bracket(treble_leaves[1:])
bracket.staff_padding = 8
bracket.color = 'blue'
bracket.dash_period = 2
bracket.dash_fraction = 0.25
section_markup = '\halign #0 \with-color #blue \circle { %s } " "'
section_markup %= section_number
bracket.bound_details__left__text = Markup(section_markup)
bracket.bound_details__left__stencil_align_dir_y = 'center'
else:
first_note = treble_section[0][1]
section_markup = '\with-color #blue \circle { %s } " "'
section_markup %= section_number
first_note.markup.up.append(section_markup)
first_note.text.staff_padding = 8
