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

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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.

Posted 29-Jan-19 9:22am

Member 12743673

Updated 29-Jan-19 9:28am

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honey the codewitch 2-Oct-20 15:33pm

Presumably you have a reason you'd like the order preserved but the JSON spec does not guarantee the order of named items - that's what XML is for. Basically what you want is to hack the JSON protocol to meet your requirements. Not that it can't be done, but know that what you want to be doing is a hack.

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Richard MacCutchan · Accepted Answer · 2019-01-29T09:29:00

I just ran your code and got the following result:

{'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'}

I can only assume there is something in your code that you have not shown us. Although I note from the documentation:

Quote:
It is best to think of a dictionary as an unordered set of key: value pairs

See also: python sort dictionary - Google Search[^].