remove duplicates from nested dictionaries in list

Question

quick and very basic newbie question.

If i have list of dictionaries looking like this:

L = []
L.append({\"value1\": value1, \"value2\": value2, \"value3         


        

Answer 1

In Python 2.6 or 3.*:

import itertools
import pprint

L = [{"value1": "fssd", "value2": "dsfds", "value3": "abcd", "value4": "gk"},
    {"value1": "asdasd", "value2": "asdas", "value3": "dafdd", "value4": "sdfsdf"},
    {"value1": "sdfsf", "value2": "sdfsdf", "value3": "abcd", "value4": "gk"},
    {"value1": "asddas", "value2": "asdsa", "value3": "abcd", "value4": "gk"},
    {"value1": "asdasd", "value2": "dskksks", "value3": "ldlsld", "value4": "sdlsld"}]

getvals = operator.itemgetter('value3', 'value4')

L.sort(key=getvals)

result = []
for k, g in itertools.groupby(L, getvals):
    result.append(g.next())

L[:] = result
pprint.pprint(L)

Almost the same in Python 2.5, except you have to use g.next() instead of next(g) in the append.