Python Pandas - 如何使用每个索引级别的名称创建 MultiIndex

要创建MultiIndex，请使用pandas。MultiIndex.from_arrays()方法。要设置每个索引级别的名称，请使用names参数。

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))

显示多索引-

print("The Multi-index...\n",multiIndex)

获取Multiindex中的级别名称-

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

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()isusedtocreateaMultiindex multiIndex = pd.MultiIndex.from_arrays(arrays, names=(ranks, student)) #displaytheMultiindex print("The Multi-index...\n",multiIndex) #getthenamesoflevelsinMultiindex print("\nThe names of levels in Multi-index...\n",multiIndex.names)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 names of levels in Multi-index... [ranks, student]