DatetimeIndex.hasnans = None

DatetimeIndex.groupby(values)

DatetimeIndex.nunique(dropna=True)

DatetimeIndex.T return the transpose, which is by definition self

DatetimeIndex.freqstr Return the frequency object as a string if its set, otherwise None

DatetimeIndex.to_pydatetime()

DatetimeIndex.second The seconds of the datetime

DatetimeIndex.get_loc(key, method=None, tolerance=None)

DatetimeIndex.all(other=None)

DatetimeIndex.argsort(*args, **kwargs)