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First solution in Uncategorized category for The Flat Dictionary by sean.chen4
def flatten(dictionary: dict[str, str | dict], parent_key: str = "") -> dict[str, str]:
result = {}
for k, v in dictionary.items():
key = parent_key + "/" + k if parent_key else k
if isinstance(v, dict):
if v:
result.update(flatten(v, key))
else:
result[key] = ""
else:
result[key] = v
return result
print("Example:")
print(flatten({"key": "value"}))
# These "asserts" are used for self-checking
assert flatten({"key": "value"}) == {"key": "value"}
assert flatten({"key": {"deeper": {"more": {"enough": "value"}}}}) == {
"key/deeper/more/enough": "value"
}
assert flatten({"empty": {}}) == {"empty": ""}
assert flatten(
{
"name": {"first": "One", "last": "Drone"},
"job": "scout",
"recent": {},
"additional": {"place": {"zone": "1", "cell": "2"}},
}
) == {
"name/first": "One",
"name/last": "Drone",
"job": "scout",
"recent": "",
"additional/place/zone": "1",
"additional/place/cell": "2",
}
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Nov. 15, 2025
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