Circular reference support about orjson HOT 4 CLOSED

import orjson

foo = []
foo.append(foo)

print(orjson.dumps(foo))  # TypeError: Recursion limit reached

# https://github.com/sindresorhus/decircular but for python

def decircular(obj, path=[], path_seen={}):
	if id(obj) in path_seen:
		return f"[Circular *{'.'.join(map(str, path_seen[id(obj)]))}]"
	match obj:
		case list():
			return [
				decircular(item, path + [i], path_seen | {id(obj): path})
				for i, item in enumerate(obj)
			]
		case dict():
			return {
				k: decircular(v, path + [k], path_seen | {id(obj): path})
				for k, v in obj.items()
			}
		case _:
			return obj

if __name__ == "__main__":
	obj = {
		"a": 1,
		"b": [
			123,
			{ "c": 2 }
		]
	}

	obj["b"][1]["d"] = obj["b"][1] # Creates a circular reference

	print(decircular(obj))
	# {'a': 1, 'b': [123, {'c': 2, 'd': '[Circular *b.1]'}]}