python iterate dictionary key value

a_dict = {'color': 'blue', 'fruit': 'apple', 'pet': 'dog'}
for key, value in a_dict.items():
  print(key, '->', value)

a_dict = {'apple':'red', 'grass':'green', 'sky':'blue'}
for key in a_dict:
  print key # for the keys
  print a_dict[key] # for the values

>>> for key, value in a_dict.items():
...     print(key, '->', value)
...
color -> blue
fruit -> apple
pet -> dog

# Python3 code to iterate through all key, value  
# pairs in a dictionary 
  
statesAndCapitals = { 
                     'Gujarat' : 'Gandhinagar', 
                     'Maharashtra' : 'Mumbai', 
                     'Rajasthan' : 'Jaipur', 
                     'Bihar' : 'Patna'
                    } 
  
# Iterating over values 
for state, capital in statesAndCapitals.items(): 
    print(state, ":", capital)