indifference 0.2.0

Track and compare differences between Python objects.

indifference

Track and compare differences between Python objects.

Installation

uv pip install indifference

Usage

import pickle
from copy import deepcopy
from indifference import diff, at


class Person:
    def __init__(self, name):
        self.name = name
        self.cache = {}
        self.secret = "hidden"

    def __deepcopy__(self, memo):
        return self

    def __reduce__(self):
        # Pickle excludes secret and modifies name
        state = {"name": "Bob", "cache": {}}
        return (self.__class__, (self.name,), state)

    def __setstate__(self, state):
        self.__dict__.update(state)


original = Person("Alice")

deepcopy_version = deepcopy(original)
pickle_version = pickle.loads(pickle.dumps(original))

deepcopy_story = diff(original, deepcopy_version)
pickle_story = diff(original, pickle_version)


# Use set operations to find differences
differences = deepcopy_story ^ pickle_story  # symmetric difference
common = deepcopy_story & pickle_story  # intersection
unique_to_pickle = pickle_story - deepcopy_story
all_changes = deepcopy_story | pickle_story

# Check what's different between the stories
assert differences == [at.name > "Bob"]

Development

• Install Task: https://taskfile.dev
• First run: task setup
• All checks: task