docs: def humanize_bandwidth(bits):
      '''
      Accept some number of bits/sec (i.e., a link capacity) as an
      integer, and return a string representing a 'human'(-like)
      representation of the capacity, e.g., 10 Mb/s, 1.5 Mb/s,
      900 Gb/s.
  
      As is the standard in networking, capacity values are assumed
      to be base-10 values (not base 2), so 1000 is 1 Kb/s.
      '''
      unit = ''
      divisor = 1
      if bits < 1000:
          unit = 'bits'
          divisor = 1
      elif bits < 1000000:
          unit = 'Kb'
          divisor = 1000
      elif bits < 1000000000:
          unit = 'Mb'
          divisor = 1000000
      elif bits < 1000000000000:
          unit = 'Gb'
          divisor = 1000000000
      elif bits < 1000000000000000:
          unit = 'Tb'
          divisor = 1000000000000
      else:
          raise Exception("Can't humanize that many bits.")
  
      if bits % divisor == 0:
          value = int(bits/divisor)
      else:
          value = bits/divisor
  
      return "{} {}/s".format(value, unit)