pandas.infer_freq

pandas.infer_freq(index)[source]

Infer the most likely frequency given the input index.

Parameters:

index:DatetimeIndex, TimedeltaIndex, Series or array-like

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

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'