Python Pandas - 如果索引中所有標籤都比已傳遞標籤晚,則從索引返回標籤


要從索引中返回標籤(如果索引中的所有標籤都比已傳遞的標籤晚),請在 Pandas 中使用 index.asof() 方法。

首先,匯入必需的庫 -

import pandas as pd

建立 Pandas 索引 -

index = pd.Index([10, 20, 30, 40, 50, 60, 70])

顯示 Pandas 索引 -

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

從索引中返回標籤。如果索引中的所有標籤都比已傳遞的標籤晚,則返回 NaN -

print("\nGet the label from the index...\n",index.asof(6))

示例

以下是程式碼 -

import pandas as pd

# Creating Pandas index
index = pd.Index([10, 20, 30, 40, 50, 60, 70])

# 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 label from the index
# Returns NaN when if all of the labels in the index are later than the passed label
print("\nGet the label from the index...\n",index.asof(6))

輸出

這將生成以下輸出 -

Pandas Index...
Int64Index([10, 20, 30, 40, 50, 60, 70], dtype='int64')

Number of elements in the index...
7

Get the label from the index...
Nan

更新於: 14-10-2021

85 次瀏覽

開啟你的職業生涯

完成課程,獲得認證

開始學習
廣告
© . All rights reserved.