pandas.DatetimeIndex.to_perioddelta

DatetimeIndex.to_perioddelta(freq)[source]

Calculate TimedeltaArray of difference between index values and index converted to PeriodArray at specified freq. Used for vectorized offsets.

Parameters
freq:Period frequency
Returns
TimedeltaArray/Index

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https://pandas.pydata.org/pandas-docs/version/1.3.4/reference/api/pandas.DatetimeIndex.to_perioddelta.html