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Active reading [<https://en.wikipedia.org/wiki/History_of_Python#Version_2> <https://en.wikipedia.org/wiki/History_of_Python#Version_3>].

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edited Sep 29, 2022 at 21:29

(For Python2Python 2.7* only; there are simpler solutions for Python3*Python 3*.)

If you're not averse to importing a standard library module, you can do

from functools import reduce

def merge_dicts(*dicts):
    return reduce(lambda a, d: a.update(d) or a, dicts, {})

(The or a bit in the lambda is necessary because dict.update always returns None on success.)

(For Python2.7* only; there are simpler solutions for Python3*.)

If you're not averse to importing a standard library module, you can do

from functools import reduce

def merge_dicts(*dicts):
    return reduce(lambda a, d: a.update(d) or a, dicts, {})

(The or a bit in the lambda is necessary because dict.update always returns None on success.)

(For Python 2.7* only; there are simpler solutions for Python 3*.)

If you're not averse to importing a standard library module, you can do

from functools import reduce

def merge_dicts(*dicts):
    return reduce(lambda a, d: a.update(d) or a, dicts, {})

(The or a bit in the lambda is necessary because dict.update always returns None on success.)

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created Mar 28, 2016 at 13:13

(For Python2.7* only; there are simpler solutions for Python3*.)

If you're not averse to importing a standard library module, you can do

from functools import reduce

def merge_dicts(*dicts):
    return reduce(lambda a, d: a.update(d) or a, dicts, {})

(The or a bit in the lambda is necessary because dict.update always returns None on success.)