new_contents: #!/usr/bin/env python2
  
  import pymacaroons
  import sys
  
  if len(sys.argv) == 1:
      sys.stderr.write("usage: %s macaroon [key]\n" % (sys.argv[0],))
      sys.exit(1)
  
  macaroon_string = sys.argv[1]
  key = sys.argv[2] if len(sys.argv) > 2 else None
  
  macaroon = pymacaroons.Macaroon.deserialize(macaroon_string)
  print macaroon.inspect()
  
  print ""
  
  verifier = pymacaroons.Verifier()
  verifier.satisfy_general(lambda c: True)
  try:
      verifier.verify(macaroon, key)
      print "Signature is correct"
  except Exception as e:
      print e.message
  
subject: Add macaroon inspection script