New in version 2.0.
Get effective tempo of component:
abjad> score = Score([])
abjad> staff = Staff("c'8 d'8 e'8 f'8")
abjad> score.append(staff)
abjad> contexttools.TempoMark(Duration(1, 8), 52)(staff[0])
TempoMark(Duration(1, 8), 52)(c'8)
abjad> f(score)
\new Score <<
\tempo 8=52
\new Staff {
c'8
d'8
e'8
f'8
}
>>
abjad> for note in staff:
... print note, contexttools.get_effective_tempo(note)
...
c'8 TempoMark(Duration(1, 8), 52)(c'8)
d'8 TempoMark(Duration(1, 8), 52)(c'8)
e'8 TempoMark(Duration(1, 8), 52)(c'8)
f'8 TempoMark(Duration(1, 8), 52)(c'8)
Return tempo mark or none.