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222

Structural diff between two dictionaries — nested keys become dotted paths instead of opaque subtree replacements.

The import name is p222 because a Python module cannot start with a digit:

from p222 import dict_diff

Install

pip install 222

Usage

from p222 import apply_diff, dict_diff

left = {"db": {"port": 5432, "host": "a"}, "tags": ["x"], "gone": 1}
right = {"db": {"port": 6543, "host": "a"}, "tags": ["y"], "new": 2}

diff = dict_diff(left, right)
# {
#   'db.port': ('changed', 5432, 6543),
#   'gone':    ('removed', 1, None),
#   'new':     ('added', None, 2),
#   'tags':    ('changed', ['x'], ['y']),
# }

apply_diff(left, diff) == right     # True

Output shape

{dotted.key: (kind, old_value, new_value)} where kind is one of added, removed, changed. Missing sides are reported as None.

License

MIT

Metadata

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