Mergin dict (https://stackoverflow.com/questions/73640524/merge-two-multi-dimention-dict-and-only-add-what-is-missing/73640771#73640771)

merging_dict.py

#!/usr/bin/env python3

import copy

A = {'v1': {'configuration': {'$schema': '...', 'network': {'$schema': '...'}}}}
E = {'v1': {'configuration': {'network': {'entries': {'$schema': '...'}}}}}

expected = {'v1': {'configuration': {'$schema': '...', 'network': {'$schema': '...', 'entries': {'$schema': '...'}}}}}

#def safe_update_dict(d_to: dict, d_from: dict):
#    for k in d_from:
#        if k in d_to:
#            if isinstance(d_to[k], dict):
#                d_to[k] = safe_update_dict(d_to[k], d_from[k])
#        else:
#            d_to[k] = d_from[k]
#    return d_to
#
#rtn = safe_update_dict(A, E)
#print(str(rtn))
#print(str(expected) == str(rtn))

#def safe_update_dict(d_to: dict, d_from: dict, inplace: bool=False):
#    def fn(d_to: dict, d_from: dict):
#        for k in d_from:
#            print(k)
#            if k in d_to:
#                if isinstance(d_to[k], dict):
#                    d_to[k] = safe_update_dict(d_to[k], d_from[k])
#            else:
#                d_to[k] = d_from[k]
#        return d_to
#    if inplace:
#        return fn(d_from, d_to)
#    return fn(fn({}, d_from), d_to)
#
#rtn = safe_update_dict(A, E)
#print(str(expected) == str(rtn))  # True

def safe_update_dict(d_to: dict, d_from: dict, inplace: bool=False):
    def fn(d_to: dict, d_from: dict):
        for k in d_from:
            if k in d_to:
                if isinstance(d_to[k], dict):
                    d_to[k] = fn(d_to[k], d_from[k])
            else:
                d_to[k] = d_from[k]
        return d_to
    if inplace:
        return fn(d_to, d_from)
    return fn(copy.deepcopy(d_to), d_from)

rtn = safe_update_dict(A, E)
print(str(expected) == str(rtn))  # True