快速删除或替换嵌套字典中的<null>值

def remove_null_values(data):
    if isinstance(data, dict):
        return {k: remove_null_values(v) for k, v in data.items() if v is not None and v != '<null>'}
    elif isinstance(data, list):
        return [remove_null_values(item) for item in data if item is not None and item != '<null>']
    else:
        return data

def replace_null_values(data):
    if isinstance(data, dict):
        return {k: replace_null_values(v) if v != '<null>' else None for k, v in data.items()}
    elif isinstance(data, list):
        return [replace_null_values(item) if item != '<null>' else None for item in data]
    else:
        return data