Python Pandas - 获取 MultiIndex 中的级别

要获取MultiIndex中的级别，请使用Pandas中的MultiIndex.levels属性。首先，导入所需的库-

import pandas as pd

MultiIndex是Pandas对象的多级或分层索引对象。创建数组-

arrays = [[1, 2, 3, 4, 5], [John, Tim, Jacob, Chris, Keiron]]

“names”参数设置每个索引级别的名称。将from_arrays()被用来创建一个多指标-

multiIndex = pd.MultiIndex.from_arrays(arrays, names=(ranks, student))

获取Multiindex中的级别-

print("\nThe levels in Multi-index...\n",multiIndex.levels)

示例

以下是代码-

import pandas as pd #MultiIndexisamulti-level,orhierarchical,indexobjectforpandasobjects #Createarrays arrays = [[1, 2, 3, 4, 5], [John, Tim, Jacob, Chris, Keiron]] # The "names" parameter sets the names for each of the index levels #Thefrom_arrays()uisusedtocreateaMultiindex multiIndex = pd.MultiIndex.from_arrays(arrays, names=(ranks, student)) #displaytheMultiindex print("The Multi-index...\n",multiIndex) #getthelevelsinMultiindex print("\nThe levels in Multi-index...\n",multiIndex.levels)输出结果

这将产生以下输出-

The Multi-index... MultiIndex([(1, John), (2, Tim), (3, Jacob), (4, Chris), (5, Keiron)], names=[ranks, student]) The levels in Multi-index... [[1, 2, 3, 4, 5], [Chris, Jacob, John, Keiron, Tim]]