def METHOD_NAME():
  """Creates a suffix regex for human-readable byte counts."""
  human_bytes_re = r'(?P<num>\d*\.\d+|\d+)\s*(?P<suffix>%s)?'
  suffixes = []
  suffix_to_si = {}
  for i, si in enumerate(_EXP_STRINGS):
    si_suffixes = [s.lower() for s in list(si)[1:]]
    for suffix in si_suffixes:
      suffix_to_si[suffix] = i
    suffixes.extend(si_suffixes)
  human_bytes_re %= '|'.join(suffixes)
  matcher = re.compile(human_bytes_re)
  return suffix_to_si, matcher