Python Pandas - 从 MultiIndex 获取每个级别长度的元组

要从MultiIndex获取具有每个级别长度的元组，请使用Pandas中的MultiIndex.levshape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。from_arrays()用于创建Multiindex的uis-

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

获取每个级别长度的元组-

print("\nThe tuple with the length of each level in a Multi-index...\n",multiIndex.levshape)

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) #gettheintegernumberoflevelsinMultiindex print("\nThe number of levels in Multi-index...\n",multiIndex.nlevels) #getthelevelsinMultiindex print("\nThe levels in Multi-index...\n",multiIndex.levels) #getatuplewiththelengthofeachlevel print("\nThe tuple with the length of each level in a Multi-index...\n",multiIndex.levshape)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 number of levels in Multi-index... 2 The levels in Multi-index... [[1, 2, 3, 4, 5], [Chris, Jacob, John, Keiron, Tim]] The tuple with the length of each level in a Multi-index... (5, 5)