Python - 返回删除特定级别的索引
要返回删除特定级别的索引，请使用Pandas中的方法。首先，导入所需的库——multiIndex.droplevel()
import pandas as pd
创建多索引。names参数设置索引中级别的名称
multiIndex = pd.MultiIndex.from_arrays([[5, 10], [15, 20], [25, 30], [35, 40]], names=['a', 'b', 'c', 'd'])
下降一个级别。我们已经传递了要删除的级别的位置作为参数-
print("\nDropping a level...\n",multiIndex.droplevel(3))示例
以下是代码-
import pandas as pd
#Createamulti-index
#Thenamesparametersetsthenamesforthelevelsintheindex
multiIndex = pd.MultiIndex.from_arrays([[5, 10], [15, 20], [25, 30], [35, 40]],
names=['a', 'b', 'c', 'd'])
#displaythemulti-index
print("Multindex...\n",multiIndex)
#Droppingalevel
#Wehavepassedthepositionoftheleveltoberemovedasaparameter
print("\nDropping a level...\n",multiIndex.droplevel(3))输出结果这将产生以下输出-
Multindex... MultiIndex([( 5, 15, 25, 35),(10, 20, 30, 40)],names=['a', 'b', 'c', 'd']) Dropping a level... MultiIndex([( 5, 15, 25),(10, 20, 30)],names=['a', 'b', 'c'])