实现设备最新读数缓存（TTL=5分钟）

def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd
    cache_csv = open_url(____).read()
    cache_log = pd.read_csv(StringIO(____))
    TTL = ____
    cache_store = {}
    results = []
    for _, row in cache_log.sort_values(____).iterrows():
        op = row['____']
        key = row['____']
        ts = float(____)
        if op == '____':
            cache_store[key] = {'____':ts,'____':TTL}
            results.append(____)
        elif op == '____':
            entry = cache_store.get(____)
            if entry and ts - entry['____'] < entry['____']:
                results.append(____)
            else:
                results.append(____)
        elif op in (____):
            cache_store.pop(____)
            results.append(____)
    reads = results.count(____) + results.count(____)
    hits = results.count(____)
    print("____"+str(____)+"____")
    print("____"+str(len(____)))
    print("____"+str(____)+"____"+str(____)+"____"+str(results.count(____))+"____")
    print("____"+str(round(____) if reads>____ else ____)+"____")
    print("____"+str(len(____)))