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Project description
Python library to calculate differences between objects.
Right now, it supports calculating differences between objects built up of dicts, lists, tuples and base types.
The major advantage compared to other diff tools is it is able to detect “slightly” changed objects that were repositioned in a list:
from differ import compare_objects
seq1 = [
{'a': 1, 'b': 1, 'c': 1},
{'a': 2, 'b': 2, 'c': 2},
{'a': 3, 'b': 3, 'c': 3},
]
seq2 = [
{'a': 30, 'b': 30, 'c': 3},
{'a': 2, 'b': 20, 'c': 2},
{'a': 1, 'b': 1, 'c': 10},
]
diff = compare_objects(seq1, seq2)
Result:
{'added': [],
'changed': [0, 1, 2],
'distance': 1.0,
'equal': [],
'removed': [],
'total': 3,
'changes': {
0: {
'diff': {
'added': [],
'changed': ['c'],
'changes': {'c': {'distance': 1.0, 'left': 1, 'right': 10}},
'distance': 0.3333333333333333,
'equal': ['a', 'b'],
'removed': [],
'total': 3},
'distance': 0.3333333333333333,
'pos': 2},
1: {
'diff': {
'added': [],
'changed': ['b'],
'changes': {'b': {'distance': 1.0, 'left': 2, 'right': 20}},
'distance': 0.3333333333333333,
'equal': ['a', 'c'],
'removed': [],
'total': 3},
'distance': 0.3333333333333333,
'pos': 1},
2: {
'diff': {
'added': [],
'changed': ['a', 'b'],
'changes': {'a': {'distance': 1.0, 'left': 3, 'right': 30},
'b': {'distance': 1.0, 'left': 3, 'right': 30}},
'distance': 0.6666666666666666,
'equal': ['c'],
'removed': [],
'total': 3},
'distance': 0.6666666666666666,
'pos': 0}}}
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