目录pandas计算移动平均值pandas求滑动平均值总结pandas计算移动平均值 本人遇到遇到一个任务，计算同月份合约当天各合约总持仓量的移动平均值。
I\'m considering creating a singleton wrapper for a Context so my model objects, if necessary, can open and read from a database connection. My model objects do not have access to a Context, and I\'d
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