如何在Python中删除Json中的Null:[]

import json

json_data = '{"key1": null, "key2": "value2", "key3": null}'
data = json.loads(json_data)

def remove_null(obj):
    if isinstance(obj, list):
        return [remove_null(item) for item in obj if item is not None]
    elif isinstance(obj, dict):
        return {key: remove_null(value) for key, value in obj.items() if value is not None}
    else:
        return obj

clean_data = remove_null(data)

clean_json = json.dumps(clean_data)

import json

def remove_null(obj):
    if isinstance(obj, list):
        return [remove_null(item) for item in obj if item is not None]
    elif isinstance(obj, dict):
        return {key: remove_null(value) for key, value in obj.items() if value is not None}
    else:
        return obj

json_data = '{"key1": null, "key2": "value2", "key3": null}'
data = json.loads(json_data)
clean_data = remove_null(data)
clean_json = json.dumps(clean_data)
print(clean_json)