列表中的平均时间值

Question

我想计算列表中日期之间的平均时间值.虽然以下效果很好,但我想知道是否有更聪明的方法？

delta = lambda last, next: (next - last).seconds + (next - last).days * 86400   
total = sum(delta(items[i-1], items[i]) for i in range(1, len(items)))
average = total / (len(items) - 1)

Answer 1

顺便说一下,如果你有一个timedeltas或datetimes列表,你为什么自己做数学？

datetimes = [ ... ]

# subtracting datetimes gives timedeltas
timedeltas = [datetimes[i-1]-datetimes[i] for i in range(1, len(datetimes))]

# giving datetime.timedelta(0) as the start value makes sum work on tds 
average_timedelta = sum(timedeltas, datetime.timedelta(0)) / len(timedeltas)

Answer 2

如果您有一个时间增量列表：

import pandas as pd
avg=pd.to_timedelta(pd.Series(yourtimedeltalist)).mean()