pandas.api.extensions.ExtensionArray.shift

ExtensionArray. shift ( periods=1, fill_value=None ) [source]

Shift values by desired number.

Newly introduced missing values are filled with self.dtype.na_value.

Parameters

periods :int, default 1

The number of periods to shift. Negative values are allowed for shifting backwards.

fill_value :object, optional

The scalar value to use for newly introduced missing values. The default is self.dtype.na_value.

Returns

ExtensionArray

Shifted.

Notes

If self is empty or periods is 0, a copy of self is returned.

If periods > len(self), then an array of size len(self) is returned, with all values filled with self.dtype.na_value.