Edit the values in a list of dictionaries?

by

I did not do any timings, but you probably can’t get much better than

for d in my_dicts:
    d.update((k, "value3") for k, v in d.iteritems() if v == "value2")

Update for Python3

for d in my_dicts:
    d.update((k, "value3") for k, v in d.items() if v == "value2")

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