实现设备令牌吊销与状态检查

def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd
    tokens_csv = open_url(____).read()
    tokens = pd.read_csv(StringIO(____))
    revoked_set = set(tokens[tokens['____']==____]['____'].tolist())
    def is_token_valid(____):
        if jti in revoked_set: return False, '____'
        if expires_at < now: return False, '____'
        return True, '____'
    print(____)
    for _, row in tokens.iterrows():
        ok, reason = is_token_valid(____)
        print(____)