INNER CODE UNIT · Python

flatten

jupyterhub/zero-to-jupyterhub-k8s · tools/compare-values-schema-content.py:51

def flatten(d, parent_key="", sep="."):
    """
    Takes a nested dictionary and return all keys flattened using a separator,
    so one element returned would for example be "hub.image.tag".
    """
    items = []
    for k, v in d.items():
        new_key = parent_key + sep + k if parent_key else k
        if isinstance(v, MutableMapping):
            if v:
                items.append(new_key)
                items.extend(flatten(v, parent_key=new_key, sep=sep))
            else:
                items.append(new_key)
        else:
            items.append(new_key)
    if not parent_key:
        items = set(items)

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