问TypeError:函数python中的“type”对象不可订阅

EN

from collections import Counter
import json  # Only for pretty printing `data` dictionary.


def get_keyword_counts(text: str, keywords: list[str]) -> dict[str, int]:
    return {
        word: count for word, count in Counter(text.split()).items()
        if word in set(keywords)
    }
// TypeError: 'type' object is not subscriptable

def main() -> None:
    data = {
        "policy": {
            "1": {
                "ID": "ML_0",
                "URL": "www.a.com",
                "Text": "my name is Martin and here is my code"
            },
            "2": {
                "ID": "ML_1",
                "URL": "www.b.com",
                "Text": "my name is Mikal and here is my code"
            }
        }
    }
    keywords = ['is', 'my']
    for policy in data['policy'].values():
        policy |= get_keyword_counts(policy['Text'], keywords)
    print(json.dumps(data, indent=4))


if __name__ == '__main__':
    main()