pandas.errors.NullFrequencyError — pandas 3.0.0rc0+40.gecf28e538a documentation (original) (raw)

exception pandas.errors.NullFrequencyError[source]#

Exception raised when a freq cannot be null.

Particularly DatetimeIndex.shift, TimedeltaIndex.shift,PeriodIndex.shift.

See also

Index.shift

Shift values of Index.

Series.shift

Shift values of Series.

Examples

df = pd.DatetimeIndex(["2011-01-01 10:00", "2011-01-01"], freq=None) df.shift(2) Traceback (most recent call last): NullFrequencyError: Cannot shift with no freq

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