How to reorder dynamic string keys for dictionary to save it to JSON

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JSON

REST

Python2.7

Django

How to sort the dynamic updated dictionary data every time new keys are updated in the dictionary? It gives me a random order for the keys whenever i try to print the dictionary after updating.

mydict ={"item_0": "apples"}
print(mydict)
mydict.update(item_1="banana")
print(mydict)
mydict.update(item_2="oranges")
print(mydict)
mydict.update(item_3="peaches")
print(mydict)
mydict.update(item_4="tangerines")
print(mydict)

Actual Results
{'item_0': 'apples'}
{'item_0': 'apples', 'item_1': 'banana'}
{'item_2': 'oranges', 'item_0': 'apples', 'item_1': 'banana'}
{'item_2': 'oranges', 'item_3': 'peaches', 'item_0': 'apples', 'item_1': 
'banana'}
{'item_4': 'tangerines', 'item_2': 'oranges', 'item_3': 'peaches', 
'item_0': 'apples', 'item_1': 'banana'}

Expected Results
{'item_0': 'apples'}
{'item_0': 'apples', 'item_1': 'banana'}
{'item_0': 'apples', 'item_1': 'banana', 'item_2': 'oranges'}
{'item_0': 'apples', 'item_1': 'banana', 'item_2': 'oranges', 'item_3': 
'peaches'}
{'item_0': 'apples', 'item_1': 'banana', 'item_2': 'oranges', 'item_3': 
'peaches', 'item_4': 'tangerines'}

What I have tried:

Using Sorted function doesn't seem to work in sorting the data dynamically or atleast not returning dictionary but returns list of tuples instead. I keep getting random order whenever new keys are added to dictionary and i need to sort them and update them in JSON formatted data.