Series.shift()
pandas.Series.shift
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Series.shift(periods=1, freq=None, axis=0)
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Shift index by desired number of periods with an optional time freq
Parameters: periods : int
Number of periods to move, can be positive or negative
freq : DateOffset, timedelta, or time rule string, optional
Increment to use from datetools module or time rule (e.g. ‘EOM’). See Notes.
axis : {0, ‘index’}
Returns: shifted : Series
Notes