How to convert python nested dict to non-nested dict?

Question

How to convert below src dict (nested dict)

{
    'a':{'b':1, 'c':{'d':2}},
    'b':3,
    'c':{'d':4, 'a':5}
}

to dst dict (not nested) below?

{
    'a.b':1,
    'a.c.d':2,
    'b':3,
    'c.d':4,
    'c.a':5
}

The src dict is nested dict. And the dst dict is not nested dict.

Any easy method to do this convention?

Answer 1

This is python package for flatten dictionary. You can use this

https://pypi.org/project/flatten-dict/

Implementation:

from flatten_dict import flatten

nested = {'a': {'b': 1, 'c': {'d': 2}},
          'b': 3,
          'c': {'d': 4, 'a': 5}}

flat = flatten(nested, reducer=lambda k1, k2: k2 if k1 is None else k1 + '.' + k2)
print(flat)
# {'a.b': 1, 'a.c.d': 2, 'b': 3, 'c.d': 4, 'c.a': 5}