New in version 2.0.
Yield right-to-left instances of klass in expr with thread_signature:
abjad> from abjad.tools import threadtools
abjad> container = Container(Voice(notetools.make_repeated_notes(2)) * 2)
abjad> container.is_parallel = True
abjad> container[0].name = 'voice 1'
abjad> container[1].name = 'vocie 2'
abjad> staff = Staff(container * 2)
abjad> pitchtools.set_ascending_named_diatonic_pitches_on_nontied_pitched_components_in_expr(staff)
abjad> f(staff)
\new Staff {
<<
\context Voice = "voice 1" {
c'8
d'8
}
\context Voice = "vocie 2" {
e'8
f'8
}
>>
<<
\context Voice = "voice 1" {
g'8
a'8
}
\context Voice = "vocie 2" {
b'8
c''8
}
>>
}
abjad> signature = threadtools.component_to_thread_signature(staff[0])
abjad> for x in threadtools.iterate_thread_backward_in_expr(staff, Note, signature): # doctest: +SKIP
... x
Note("c''8")
Note("b'8")
Note("f'8")
Note("e'8")
The important thing to note is that the function yields only those leaves that sit in the same thread.
Compare with componenttools.iterate_components_backward_in_expr().
Changed in version 2.0: renamed iterate.thread_backward_in() to threadtools.iterate_thread_backward_in_expr().