Python Pandas - 在條件為 False 的情況下替換索引值


若要在條件為 False 的情況下替換索引值,請使用 Pandas 中的 index.isin() 方法。首先,匯入所需的庫 -

import pandas as pd

建立 Pandas 索引 -

index = pd.Index(['Electronics','Accessories','Decor', 'Books', 'Toys'], name ='Products')

顯示 Pandas 索引 -

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

替換條件為 False 的值。在此處,除了 'Decor' 之外,所有其他元素都得到了替換 -

print("\nReplace index vales where condition is False...\n",index.where(index.isin(['Decor']), 'Miscellaneous'))

示例

以下是程式碼 -

import pandas as pd

# Creating Pandas index
index = pd.Index(['Electronics','Accessories','Decor', 'Books', 'Toys'], name ='Products')

# 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)

# replace values where condition is False
# Here, except the 'Decor', every other element gets replaced
print("\nReplace index vales where condition is False...\n",index.where(index.isin(['Decor']), 'Miscellaneous'))

輸出

這將產生以下輸出 -

Pandas Index...
Index(['Electronics', 'Accessories', 'Decor', 'Books', 'Toys'], dtype='object', name='Products')

Number of elements in the index...
5

The dtype object...
object

Replace index vales where condition is False...
Index(['Miscellaneous', 'Miscellaneous', 'Decor', 'Miscellaneous','Miscellaneous'],dtype='object', name='Products')

更新於: 2021 年 10 月 13 日

210 次瀏覽

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