Series.tshift()
pandas.Series.tshift
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Series.tshift(periods=1, freq=None, axis=0)
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Shift the time index, using the index’s frequency if available.
Parameters: periods : int
Number of periods to move, can be positive or negative
freq : DateOffset, timedelta, or time rule string, default None
Increment to use from datetools module or time rule (e.g. ‘EOM’)
axis : int or basestring
Corresponds to the axis that contains the Index
Returns: shifted : NDFrame