Python Pandas - 形成兩個索引物件之間的交集並對結果進行排序
若要形成兩個索引物件之間的交集,請在 Pandas 中使用 index1.intersection(index2) 方法。若要對結果進行排序,請使用 sort 引數。
首先,匯入必需的庫 −
import pandas as pd
建立 Pandas index1 和 index2 −
index1 = pd.Index([4, 3, 2, 1]) index2 = pd.Index([8, 2, 6, 4])
顯示 Pandas index1 和 index2
print("Pandas Index1...\n",index1)
print("Pandas Index2...\n",index2)執行交集操作。使用“sort”引數對結果進行排序
res = index1.intersection(index2, sort=None)
示例
以下是程式碼 −
import pandas as pd
# Creating Pandas index1 and index2
index1 = pd.Index([4, 3, 2, 1])
index2 = pd.Index([8, 2, 6, 4])
# 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)
# Perform intersection
# The results are sorted using the "sort" parameter
res = index1.intersection(index2, sort=None)
# Intersection of both the indexes and returning sorted result
print("\nThe index1 and index2 intersection (sorted result)...\n",res)輸出
將產生以下輸出 −
Pandas Index1... Int64Index([4, 3, 2, 1], dtype='int64') Pandas Index2... Int64Index([8, 2, 6, 4], dtype='int64') Number of elements in index1... 4 Number of elements in index2... 4 The index1 and index2 intersection (sorted result)... Int64Index([2, 4], dtype='int64')
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