import copy
from jsonpath import JSONPatch, JSONPatchError, JSONPatchTestFailure
test_dict = {"a":{"b":{"c": 1}}}
patcher = JSONPatch(ops=[
       { "op": "replace", "path": "/a/b/c", "value": 42 },
       { "op": "test", "path": "/a/b/c", "value": "C" }
     ])
test_copy = copy.deepcopy(test_dict)
patcher.atomic(test_dict) # raised exception as expected
test_dict == test_copy
True
print(test_dict)
{'a': {'b': {'c': 1}}}
print(test_copy)
{'a': {'b': {'c': 1}}}