Python - 建立 Pandas 索引的新檢視


要建立 Pandas 索引的新檢視,請使用 index.view() 方法。首先,匯入所需的庫 −

import pandas as pd

建立 Pandas 索引 −

index = pd.Index([50, 10, 70, 110, 90, 50, 110, 90, 30])

顯示 Pandas 索引 −

print("Pandas Index...\n",index)

建立一個新檢視 −

res = index.view('uint8')

顯示新檢視 −

print("\nThe new view...\n",res)

它共享相同的基本值 −

print("\nView for 0th index...\n",res[0])
print("\nView for 1st index...\n",res[1])

示例

以下為程式碼 −

import pandas as pd

# Creating Pandas index
index = pd.Index([50, 10, 70, 110, 90, 50, 110, 90, 30])

# Display the Pandas index
print("Pandas Index...\n",index)

# Return the number of elements in the Index
print("\nNumber of elements in the index...\n",index.size)

# Return the dtype of the data
print("\nThe dtype object...\n",index.dtype)

# Create a new view
res = index.view('uint8')

# displaying the new view
print("\nThe new view...\n",res)

# shares the same underlying values
print("\nView for 0th index...\n",res[0])
print("\nView for 1st index...\n",res[1])

輸出

將產生以下輸出 −

Pandas Index...
Int64Index([50, 10, 70, 110, 90, 50, 110, 90, 30], dtype='int64')

Number of elements in the index...
9

The dtype object...
int64

The new view...
[ 50 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 70 0
  0 0 0 0 0 0 110 0 0 0 0 0 0 0 90 0 0 0
  0 0 0 0 50 0 0 0 0 0 0 0 110 0 0 0 0 0
  0 0 90 0 0 0 0 0 0 0 30 0 0 0 0 0 0 0]

View for 0th index...
50

View for 1st index...
0

更新日期: 14-Oct-2021

156 次瀏覽

開啟您的職業生涯

完成課程即可獲得認證

立即開始
廣告