List of dict unique combination Python -


i have big data visualization purpose, example list of dict as,

input : 

a = [{'e1': 'a','e2': 'b'}, {'e1': 'b','e2': 'a'}, {'e1': 'a','e2': 'c'} ]

output : 

a = [{'e1': 'a','e2': 'b'}, {'e1': 'a','e2': 'c'}]

detail: if {'e1': 'a','e2': 'b'} , {'e1': 'b','e2': 'a'} pointing each others value want unique {'e1': 'a','e2': 'b'}.

so e1 source , e2 target. if connection exists between source , target should unique. here connected b should not consider b connected a.

you may try 1 

from itertools import groupby [j.next() , j in groupby(a, lambda x: sorted(x.values()))

output: 

[{'e1': 'a', 'e2': 'b'}, {'e1': 'a', 'e2': 'c'}]

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