def _parse_bytes(range_header):
  try:
    parsed_ranges = []
    units, ranges = range_header.split('=', 1)
    for range_value in ranges.split(','):
      range_value = range_value.strip()
      if range_value:
        parsed_ranges.append(_parse_range_value(range_value))
    if not parsed_ranges:
      return None
    return units, parsed_ranges
  except ValueError:
    return None
write some text to the physical file, assuming the node is a file
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/webapp/blobstore_handlers.py/_parse_bytes--crossover with--dataset/ETHPy150Open cournape/Bento/bento/core/node.py/Node.write