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 : boolean, default True
Returns:	str or None None if no discernible frequency TypeError if the index is not datetime-like ValueError if there are less than three values.