Python Pandas - 返回不在其他索引中的索引的新索引,但不排序结果
要返回不在其他索引中的索引的新索引,但不排序结果,请使用 **difference()** 方法。将 **sort** 参数设置为 **False**。
首先,导入所需的库 −
import pandas as pd
创建两个 Pandas 索引 −
index1 = pd.Index([30, 10, 20, 50, 40]) index2 = pd.Index([80, 40, 60, 20, 55])
显示 Pandas index1 和 index2 −
print("Pandas Index1...\n",index1) print("Pandas Index2...\n",index2)
获取两个索引的差异。使用值为“False”的“sort”参数对结果进行不排序 −
res = index1.difference(index2, sort=False)
示例
以下为代码 −
import pandas as pd # Creating two Pandas index index1 = pd.Index([30, 10, 20, 50, 40]) index2 = pd.Index([80, 40, 60, 20, 55]) # Display the Pandas index1 and index2 print("Pandas Index1...\n",index1) print("Pandas Index2...\n",index2) # Return the number of elements in Index1 and Index2 print("\nNumber of elements in index1...\n",index1.size) print("\nNumber of elements in index2...\n",index2.size) # Get the difference of both the indexes # Results are unsorted using the "sort" parameter with value "False" res = index1.difference(index2, sort=False) # Difference of both the indexes i.e. return a new Index with elements of index not in other print("\nDifference...\n",res)
输出
这将产生以下输出 −
Pandas Index1... Int64Index([30, 10, 20, 50, 40], dtype='int64') Pandas Index2... Int64Index([80, 40, 60, 20, 55], dtype='int64') Number of elements in index1... 5 Number of elements in index2... 5 Difference... Int64Index([30, 10, 50], dtype='int64')
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