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First solution in Clear category for The Flat Dictionary by kavishhh
def flatten(dictionary: dict) -> dict:
result = {}
def _flatten_recursive(current_dict, path_prefix=""):
for key, value in current_dict.items():
new_path = f"{path_prefix}/{key}" if path_prefix else key
if isinstance(value, str):
result[new_path] = value
elif isinstance(value, dict):
if not value:
result[new_path] = ""
else:
_flatten_recursive(value, new_path)
_flatten_recursive(dictionary)
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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Oct. 29, 2025
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