New in version 2.3.
True when expr is a component with tempo mark attached:
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)
TempoMark(Duration(1, 8), 52)(Staff{4})
abjad> f(score)
\new Score <<
\tempo 8=52
\new Staff {
c'8
d'8
e'8
f'8
}
>>
abjad> contexttools.is_component_with_tempo_mark_attached(staff)
True
Otherwise false:
abjad> contexttools.is_component_with_tempo_mark_attached(staff[0])
False
Return boolean.