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构建农业上报统一响应体（含下发指令）

未完成
初级参考 完整示例代码供参考，建议自己理解后重新输入 
def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd, json
    devs_csv = open_url("https://data.zuihe.com/dbd/ms-greenfarm/state_00/devices.csv").read()
    devs = pd.read_csv(StringIO(devs_csv))
    def build_ack(device_id, server_ts, cmd=None, errors=None):
        resp = {'ack':True,'server_ts':server_ts,'device_id':device_id}
        if cmd: resp['cmd'] = cmd
        if errors: resp['ack'] = False; resp['errors'] = errors
        return resp
    cases = [
        ('SOIL-A01', 1748736000, None, None),
        ('SOIL-A01', 1748736001, {'action':'irrigate','duration':300,'zone':'A'}, None),
        ('SOIL-X99', 1748736002, None, ['unknown_device']),
    ]
    for did, ts, cmd, errors in cases:
        resp = build_ack(did, ts, cmd, errors)
        print(did + ": " + json.dumps(resp, ensure_ascii=False)[:80])

示例

输入
solve()
期望输出
SOIL-A01: {"ack": true, "server_ts": 1748736000, "device_id": "SOIL-A01"}
SOIL-A01: {"ack": true, "server_ts": 1748736001, "device_id": "SOIL-A01", "cmd": {"action"
SOIL-X99: {"ack": false, "server_ts": 1748736002, "device_id": "SOIL-X99", "errors": ["unk
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