解析水肥控制器状态上报

def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd, json
    devs_csv = open_url(____).read()
    devs = pd.read_csv(StringIO(____))
    def parse_fertigation(____):
        p = json.loads(____)
        nutrients = p.get(____)
        n_ratio = nutrients.get(____)
        p_ratio = nutrients.get(____)
        k_ratio = nutrients.get(____)
        ratio_sum = n_ratio + p_ratio + k_ratio
        valve_states = p.get(____)
        open_valves = [k for k, v in valve_states.items() if v]
        return {'____':p['____'],'____':p.get(____),'____':p.get(____),'____':p.get(____),'____':str(____)+"____"+str(____)+"____"+str(____),'____':ratio_sum==____,'____':open_valves}
    payload = '____'
    r = parse_fertigation(____)
    print(r['____'] + "____" + str(____) + "____" + str(____) + "____" + str(____))
    print("____" + r['____'] + "____" + str(____))
    print("____" + str(____))