for a in a_list:
Note that IDW often includes a variable exponent that is applied to the distance before taking the inverse. For a given distance , the weight of the candidate becomes:
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据龙先生介绍，他用自己的手机号申请一张附属卡，交由母亲日常使用。母亲原先的手机号关联所有银行卡，作为一个纯粹的“安全验证工具”由他来管理，以确保转账时的验证码就由他来接收。