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']