如何根据时间戳过滤json？UNIX

import json
import time

def filter_json_by_timestamp(json_data, start_time, end_time):
    filtered_data = []
    for obj in json_data:
        timestamp = obj.get("timestamp")
        if timestamp >= start_time and timestamp <= end_time:
            filtered_data.append(obj)
    return filtered_data

# 示例JSON数据
json_str = '''
[
    {"timestamp": 1638297600, "data": "A"},
    {"timestamp": 1638384000, "data": "B"},
    {"timestamp": 1638470400, "data": "C"}
]
'''

# 解析JSON数据
json_data = json.loads(json_str)

# 设置时间范围（示例：过滤2021年12月1日至2021年12月5日的数据）
start_time = int(time.mktime(time.strptime("2021-12-01", "%Y-%m-%d")))
end_time = int(time.mktime(time.strptime("2021-12-05", "%Y-%m-%d")))

# 过滤JSON数据
filtered_json = filter_json_by_timestamp(json_data, start_time, end_time)

# 将过滤后的JSON数据转换为字符串
filtered_json_str = json.dumps(filtered_json)

print(filtered_json_str)