pandas.infer_freq

pandas.infer_freq(index, warn=True)[source]

Infer the most likely frequency given the input index. If the frequency is uncertain, a warning will be printed.

Parameters

index:DatetimeIndex or TimedeltaIndex

If passed a Series will use the values of the series (NOT THE INDEX).

warn:bool, default True

Returns

str or None

None if no discernible frequency.

Raises

TypeError

If the index is not datetime-like.

ValueError

If there are fewer than three values.

Examples

>>> idx = pd.date_range(start='2020/12/01', end='2020/12/30', periods=30)
>>> pd.infer_freq(idx)
'D'