CategoricalIndex.dtype_str = None

DataFrame.isnull()

DataFrame.count(axis=0, level=None, numeric_only=False)

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

Index.max()

DataFrame.any(axis=None, bool_only=None, skipna=None, level=None, **kwargs)

Series.pop(item)

CategoricalIndex.append(other)

Index.argsort(*args, **kwargs)

pandas.pivot(index, columns, values)