Iterating over key and value of defaultdict dictionaries

you need to iterate over dict.iteritems():

for k,v in d.iteritems():               # will become d.items() in py3k
  print "%s - %s" % (str(k), str(v))

Update: in py3 V3.6+

for k,v in d.items():
  print (f"{k} - {v}")