python iterate through dictionary

dictionary = {52:"E",126:"A",134:"B",188:"C",189:"D"}
for key, value in dictionary.items():
	print(key)
	print(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

#iterate the dict by keys
for key in a_dict:
	print(key)
#iterate the dict by items - (key,value)
for item in a_dict.items():
    print(item)
#iterate the dict by values
for value in a_dict.values():
    print(value)

new_list = [something(key, value) for key, value in a_dict.items()]

for x, y in thisdict.items():
	print(x, y) 

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

a_dict = {"color": "blue", "fruit": "apple", "pet": "dog"}
for key in a_dict:
  print(key, '->', a_dict[key])

# Output:
# color -> blue
# fruit -> apple
# pet -> dog

for key in dictionary_name: