有没有办法动态过滤JSON？

import json

# 假设有以下JSON数据
json_data = '''
{
  "employees": [
    {
      "firstName": "John",
      "lastName": "Doe",
      "age": 30,
      "department": "IT"
    },
    {
      "firstName": "Jane",
      "lastName": "Smith",
      "age": 35,
      "department": "HR"
    },
    {
      "firstName": "Bob",
      "lastName": "Johnson",
      "age": 25,
      "department": "Sales"
    }
  ]
}
'''

# 将JSON数据解析为Python对象
data = json.loads(json_data)

# 根据条件筛选数据
filtered_data = [employee for employee in data['employees'] if employee['age'] > 30]

# 将筛选结果重新组织为JSON对象
filtered_json = {'employees': filtered_data}

# 将筛选后的JSON对象转换为字符串
filtered_json_str = json.dumps(filtered_json)

print(filtered_json_str)