Caching a box resuts in read error

[srikiran-cpn]

I have a use case where I want to cache boxes and read them back again. Below is a MWE using joblib for caching but I also found it doesn't work Flask caching. I think some metadata is lost when caching the box, so the retrieved box somehow is not a box with box_dots = True.

Code

import box
print(box.__version__)
from box import Box
import joblib
print(joblib.__version__)
b2 = Box(
    {
        "l1": {
            "time_range_selected_utc": {
                "left": "2023-03-01 10:00:00",
                "right": "2023-06-01 10:00:00",
            }
        }
    },
    box_dots=True,
    conversion_box=False,
    frozen_box=False,
)
print(b2.l1.time_range_selected_utc.left)
print(b2["l1.time_range_selected_utc.right"])
print(b2["l1.time_range_selected_utc.left"])

joblib.dump(b2, "boxdump.joblib")

b3 = joblib.load("boxdump.joblib")
print(b3.l1.time_range_selected_utc.left)
print(b3["l1.time_range_selected_utc.right"]) # this will fail
print(b3["l1.time_range_selected_utc.left"])

Output

7.1.1
1.3.2
2023-03-01 10:00:00
2023-06-01 10:00:00
2023-03-01 10:00:00
2023-03-01 10:00:00
---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
File [~/opt/miniconda3/envs/om3/lib/python3.9/site-packages/box/box.py:592](https://file+.vscode-resource.vscode-cdn.net/Users/sriki/Documents/cpnet/OmegaMuller/~/opt/miniconda3/envs/om3/lib/python3.9/site-packages/box/box.py:592), in box.box.Box.__getitem__()

KeyError: 'l1.time_range_selected_utc.right'

During handling of the above exception, another exception occurred:

KeyError                                  Traceback (most recent call last)
File [~/opt/miniconda3/envs/om3/lib/python3.9/site-packages/box/box.py:592](https://file+.vscode-resource.vscode-cdn.net/Users/sriki/Documents/cpnet/OmegaMuller/~/opt/miniconda3/envs/om3/lib/python3.9/site-packages/box/box.py:592), in box.box.Box.__getitem__()

KeyError: 'time_range_selected_utc.right'

...

[cdgriffith]

It seems that when pickling the box, only the outer most box is set to box_dots=True for some reason.

from box import Box
import pickle

b2 = Box(
    {
        "l1": {
            "time_range_selected_utc": {
                "left": "2023-03-01 10:00:00",
                "right": "2023-06-01 10:00:00",
            }
        },
    },
    **{'box_dots': True, 'conversion_box': False, 'frozen_box': False}
)

pickle.dump(b2, open("testpickle", "wb"))
loaded = pickle.load(open("testpickle", "rb"))

print(loaded._box_config)
print(loaded["l1"])  # Works

print(loaded["l1"]._box_config)
print(loaded["l1.time_range_selected_utc"])  # Works

print(loaded["l1.time_range_selected_utc"]._box_config)
print(loaded["l1.time_range_selected_utc.left"])  # Breaks