Python sets in dictionary not consistant sort behaviour

Asked Apr 19 '17 at 22:56

Active Apr 19 '17 at 22:59

Viewed 50 times

I created a dictionary of sets in Python:

graph = {'A': {'B', 'C'},
     'B': {'D', 'E'},
     'C': {'F','A'}}

print(graph['A'])
print(graph['B'])
print(graph['C'])

However the order that elements are printed differ everytime I execute my code!

{'B', 'C'}
{'E', 'D'}
{'F', 'A'}

and next time:

{'B', 'C'}
{'D', 'E'}
{'A', 'F'}

What causes this inconsistent behaviour?

asked Apr 19 '17 at 22:56

Lau

A better link to answer the question is http://stackoverflow.com/questions/14956313/why-is-dictionary-ordering-non-deterministic – Mark Ransom Apr 19 '17 at 22:58
@MarkRansom added it to the list of duplicates – vaultah Apr 19 '17 at 23:00
@vaultah thanks. I could have done it myself if I had remembered the ability to edit duplicate link lists. – Mark Ransom Apr 19 '17 at 23:03

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