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@yatsu
Created April 28, 2018 13:43
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Python dict deep merge
from copy import deepcopy
from functools import reduce
def deep_merge(*dicts, update=False):
"""
Merges dicts deeply.
Parameters
----------
dicts : list[dict]
List of dicts.
update : bool
Whether to update the first dict or create a new dict.
Returns
-------
merged : dict
Merged dict.
"""
def merge_into(d1, d2):
for key in d2:
if key not in d1 or not isinstance(d1[key], dict):
d1[key] = deepcopy(d2[key])
else:
d1[key] = merge_into(d1[key], d2[key])
return d1
if update:
return reduce(merge_into, dicts[1:], dicts[0])
else:
return reduce(merge_into, dicts, {})
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