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def run(action, music=None, value=0, delta=False, **kwargs):
for music in action.music_list(music):
music.seek(value=value, delta=delta)
def description(action, music=None, value=0, delta=False, **kwargs):
if delta:
if music is not None:
return "moving music « {} » by {:+d}s" \
.format(music.name, value)
else:
return "moving all musics by {:+d}s" \
.format(value)
else:
if music is not None:
return "moving music « {} » to position {}s" \
.format(music.name, value)
else:
return "moving all musics to position {}s" \
.format(value)
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