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Python Pandas - 获取 MultiIndex 中的级别

2024-05-20 16:18:07 399

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']]

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Python Pandas - 获取 MultiIndex 中的级别

示例

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