New in version 2.0.
Change LilyPond duration_string to rational list:
abjad> from abjad.tools import durationtools
abjad> durationtools.lilypond_duration_string_to_rational_list('8.. 32 8.. 32')
[Fraction(7, 32), Fraction(1, 32), Fraction(7, 32), Fraction(1, 32)]
Return list of fractions.