Fails to understand new key in an existing object inside a list

[mwgamble]

I ran this code:

from patchdiff import diff
old_val = {"conditions": [{"type": "Ready"}]}
new_val = {"conditions": [{"type": "Ready", "message": "test"}]}
diff(old_val, new_val)

And received the following error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File ".venv/lib/python3.10/site-packages/patchdiff/diff.py", line 136, in diff
    return diff_dicts(input, output, ptr)
  File ".venv/lib/python3.10/site-packages/patchdiff/diff.py", line 110, in diff_dicts
    key_ops, key_rops = diff(input[key], output[key], ptr.append(key))
  File ".venv/lib/python3.10/site-packages/patchdiff/diff.py", line 134, in diff
    return diff_lists(input, output, ptr)
  File ".venv/lib/python3.10/site-packages/patchdiff/diff.py", line 88, in diff_lists
    padded_rops, _ = reduce(partial(pad, target=output), solution["rops"], [[], 0])
  File ".venv/lib/python3.10/site-packages/patchdiff/diff.py", line 83, in pad
    replace_ops, _ = diff(op["original"], op["value"], replace_ptr)
  File ".venv/lib/python3.10/site-packages/patchdiff/diff.py", line 136, in diff
    return diff_dicts(input, output, ptr)
  File ".venv/lib/python3.10/site-packages/patchdiff/diff.py", line 99, in diff_dicts
    rops.insert(0, {"op": "add", "path": ptr.append(key), "value": output[key]})
KeyError: 'message'

[berendkleinhaneveld]

Thanks for reporting!