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
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