3 MultiIndex / Advanced Indexing

This section covers indexing with a MultiIndex and more advanced indexing features.

See the Indexing and Selecting Data for general indexing documentation.

Warning

Whether a copy or a reference is returned for a setting operation, may depend on the context. This is sometimes called chained assignment and should be avoided. See Returning a View versus Copy

Warning

In 0.15.0 Index has internally been refactored to no longer sub-class ndarray but instead subclass PandasObject, similarly to the rest of the pandas objects. This should be a transparent change with only very limited API implications (See the Internal Refactoring)

See the cookbook for some advanced strategies

Contents

In [1]: import numpy as np

In [2]: import pandas as pd

In [3]: np.random.seed(123456)

In [4]: np.set_printoptions(precision=4, suppress=True)

In [5]: pd.options.display.max_rows=8