Python Pandas - 对索引值进行排序并返回对索引进行排序的索引
要对索引值进行排序并返回对索引进行排序的索引,请使用. 该return_indexer参数被设置为真。index.sort_values()
首先,导入所需的库 -
import pandas as pd
创建熊猫索引 -
index = pd.Index([50, 10, 70, 95, 110, 90, 30])
显示熊猫指数 -
print("Pandas Index...\n",index)
排序索引值。默认情况下,按升序排序。使用值为 True 的“return_indexer”参数返回索引以对索引进行排序 -
print("\nSort and also return the indices that would sort the index...\n",index.sort_values(return_indexer=True))
示例
以下是代码 -
import pandas as pd输出结果# 创建 Pandas 索引
index = pd.Index([50, 10, 70, 95, 110, 90, 30])
# 显示 Pandas 索引
print("Pandas Index...\n",index)
# 返回索引中的元素数
print("\nNumber of elements in the index...\n",index.size)
# 排序索引值
# 默认情况下,按升序排序
# Return the indices to sort the index using the "return_indexer" parameter with value True
print("\nSort and also return the indices that would sort the index...\n",index.sort_values(return_indexer=True))
这将产生以下输出 -
Pandas Index...Int64Index([50, 10, 70, 95, 110, 90, 30], dtype='int64')
Number of elements in the index...
7
Sort and also return the indices that would sort the index...
(Int64Index([10, 30, 50, 70, 90, 95, 110], dtype='int64'), array([1, 6, 0, 2, 5, 3, 4], dtype=int64))
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