Utilities (utils)# Data: MISSING Sentinel to indicate the lack of a value when None is ambiguous. Functions: get_in(keys, nested_dict[, default, factory]) open_notebook.utils.MISSING = MISSING# Sentinel to indicate the lack of a value when None is ambiguous. open_notebook.utils.get_in(keys, nested_dict, default=MISSING, factory=None)[source]# >>> foo = {"a": {"b": {"c": 1}}} >>> get_in(["a", "b"], foo) {'c': 1}