New in version 1.1.
Get component n in the klasses of expr:
abjad> staff = Staff([])
abjad> durations = [Duration(n, 16) for n in range(1, 5)]
abjad> notes = notetools.make_notes([0, 2, 4, 5], durations)
abjad> rests = resttools.make_rests(durations)
abjad> from abjad.tools import sequencetools
abjad> leaves = sequencetools.interlace_sequences(notes, rests)
abjad> staff.extend(leaves)
abjad> print staff.format
\new Staff {
c'16
r16
d'8
r8
e'8.
r8.
f'4
r4
}
abjad> for n in range(4):
... componenttools.get_nth_component_in_expr(staff, Note, n)
...
Note("c'16")
Note("d'8")
Note("e'8.")
Note("f'4")
abjad> for n in range(4):
... componenttools.get_nth_component_in_expr(staff, Rest, n)
...
Rest('r16')
Rest('r8')
Rest('r8.')
Rest('r4')
abjad> componenttools.get_nth_component_in_expr(staff, Staff)
Staff{8}
Read right-to-left for negative values of n:
abjad> for n in range(3, -1, -1):
... componenttools.get_nth_component_in_expr(staff, Rest, n)
...
Rest('r4')
Rest('r8.')
Rest('r8')
Rest('r16')
Return component or none.
Changed in version 2.0: renamed iterate.get_nth() to componenttools.get_nth_component_in_expr().