CategoricalIndex.all(other=None)

GroupBy.head(n=5)

Resampler.pad(limit=None)

Series.dt.daysinmonth The number of days in the month New

SeriesGroupBy.unique() Return np.ndarray of unique values in the object. Significantly faster than numpy

Series.str.isdigit()

CategoricalIndex.is_categorical()

GroupBy.sem(ddof=1)

Series.itemsize return the size of the dtype of the item of the underlying data

DataFrame.pivot(index=None, columns=None, values=None)