def __init__(self):
        self.calls = []
        self.pendingResults = []
read proxy list from website
dataset/ETHPy150Open twisted/twisted/twisted/names/test/test_rootresolve.py/StubResolver.__init__--crossover with--dataset/ETHPy150Open sk1418/zhuaxia/zhuaxia/proxypool.py/ProxyPool.load_list