#! /usr/bin/env python import sysimport os.pathfrom aubio import source, sink if __name__ == '__main__':    if len(sys.argv) < 3:        print('usage: %s <inputfile> <duration>' % sys.argv[0])        sys.exit(1)    source_file = sys.argv[1]    duration = float(sys.argv[2])    source_base_name, source_ext = os.path.splitext(os.path.basename(source_file))     hopsize = 256    slice_n, total_frames_written, read = 0, 0, hopsize     def new_sink_name(source_base_name, slice_n, duration = duration):        return source_base_name + '_%02.3f' % (slice_n*duration) + '.wav'     f = source(source_file, 0, hopsize)    samplerate = f.samplerate    g = sink(new_sink_name(source_base_name, slice_n), samplerate)     #print "new slice:", slice_n, 0, "+", 0, "=", 0    while read == hopsize:        vec, read = f()        start_of_next_region = int(duration * samplerate * (slice_n + 1))        remaining = start_of_next_region - total_frames_written        # number of samples remaining is less than what we got        if remaining <= read:            # write remaining samples from current region            g(vec[0:remaining], remaining)            # close this file            del g            #print "new slice", slice_n, total_frames_written, "+", remaining, "=", start_of_next_region            slice_n += 1            # create a new file for the new region            g = sink(new_sink_name(source_base_name, slice_n), samplerate)            # write the remaining samples in the new file            g(vec[remaining:read], read - remaining)        else:            g(vec[0:read], read)        total_frames_written += read    total_duration = total_frames_written / float(samplerate)    slice_n += 1    outstr = 'created %(slice_n)s slices from %(source_base_name)s%(source_ext)s' % locals()    outstr += ' (total duration %(total_duration).2fs)' % locals()    print(outstr)    # close source and sink files    del f, g