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Pandas DataFrame stack() 方法

❮ DataFrame 参考


示例

将一个表格形式的 DataFrame(每个索引有 4 列)转换为另一个表格,其中每个索引都有自己的级别,并且每一列对应一行。

在这个例子中,我们使用了一个名为 data.csv 的 .csv 文件。

import pandas as pd

df = pd.read_csv('data.csv')

newdf = df.stack()
自己尝试一下 »

定义和用法

stack() 方法将 DataFrame 重塑为一个表格,其中每个列都对应一个新的最内层行级别。


语法

dataframe.stack(level, dropna)

参数

dropna 参数是一个 关键字参数

参数 描述
level   必需,数字、字符串或列表,指定从列轴到行轴堆叠的级别。
dropna True
False
可选,默认为 True。指定是否丢弃空值。

返回值

一个重塑后的 DataFrame 对象。

此方法不会更改原始 DataFrame。


❮ DataFrame 参考

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