ch11_02 时间序列

import pandas as pd import numpy as np from datetime import datetime WOM日期 WOM（Week of Month）是一种非常实用的频率类 # 每个月的第三个星期五 rng = pd.date_range('2012-01-01','2012-09-01',freq='WOM-3FRI') list(rng) [Timestam

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