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Pandas DataFrame isna() 方法

❮ DataFrame 参考


示例

将 DataFrame 中所有非数字 (NaN) 值替换为 True,其他值替换为 False。

在本例中,我们使用一个名为 data.csv 的 .csv 文件。

import pandas as pd

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

newdf = df.isna()
自己尝试一下 »

定义和用法

isna() 方法返回一个 DataFrame 对象,其中所有值都被替换为布尔值:对于 NA(非数字)值替换为 True,其他值替换为 False。


语法

dataframe.isna()

参数

此方法不接受任何参数。


返回值

一个包含布尔值的 DataFrame


❮ DataFrame 参考

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