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'))
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