Panel.mask(cond, other=nan, inplace=False, axis=None, level=None, try_cast=False, raise_on_error=True)

DataFrame.sem(axis=None, skipna=None, level=None, ddof=1, numeric_only=None, **kwargs)

Resampler.fillna(method, limit=None)

Panel4D.shape Return a tuple of axis dimensions

Series.groupby(by=None, axis=0, level=None, as_index=True, sort=True, group_keys=True, squeeze=False, **kwargs)

Panel4D.sum(axis=None, skipna=None, level=None, numeric_only=None, **kwargs)

Panel4D.ix A primarily label-location based indexer, with integer position fallback. .ix[] supports

Panel.get_ftype_counts()

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

Series.str.isdigit()