Python Pandas - 获取 MultiIndex 中请求标签/级别的位置和切片索引
要获取 MultiIndex 中请求的标签/级别的位置和切片索引,请使用 Pandas 中的 get_loc_level() 方法。
首先,导入必需的库:
import pandas as pd
MultiIndex 是 pandas 对象的多级或层次索引对象:
multiIndex = pd.MultiIndex.from_arrays([list('pqrrss'), list('strvwx')],names=['One', 'Two'])显示 MultiIndex:
print("The MultiIndex...\n",multiIndex)
获取位置和切片索引:
print("\nGet the location and sliced index...\n",multiIndex.get_loc_level('r'))示例
以下为代码:
import pandas as pd
# MultiIndex is a multi-level, or hierarchical, index object for pandas objects
multiIndex = pd.MultiIndex.from_arrays([list('pqrrss'), list('strvwx')],names=['One', 'Two'])
# display the MultiIndex
print("The MultiIndex...\n",multiIndex)
# get the levels in MultiIndex
print("\nThe levels in MultiIndex...\n",multiIndex.levels)
# Get the location and sliced index
print("\nGet the location and sliced index...\n",multiIndex.get_loc_level('r'))输出
这将产生以下输出:
The MultiIndex...
MultiIndex([('p', 's'),
('q', 't'),
('r', 'r'),
('r', 'v'),
('s', 'w'),
('s', 'x')],
names=['One', 'Two'])
The levels in MultiIndex...
[['p', 'q', 'r', 's'], ['r', 's', 't', 'v', 'w', 'x']]
Get the location and sliced index...
(slice(2, 4, None), Index(['r', 'v'], dtype='object', name='Two'))
广告
数据结构
网络
RDBMS
操作系统
Java
iOS
HTML
CSS
Android
Python
C 编程
C++
C#
MongoDB
MySQL
Javascript
PHP