Json字符串:检查名称以"a string“开头但所有值为空的所有键

import json

def find_keys_with_empty_values(json_str):
    data = json.loads(json_str)
    keys_with_empty_values = []

    for key, value in data.items():
        if key.startswith("a string") and value == "":
            keys_with_empty_values.append(key)

    return keys_with_empty_values

json_str = '{"a string1": "", "a string2": "value2", "a string3": "", "another key": "another value"}'
result = find_keys_with_empty_values(json_str)
print(result)