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Pandas DataFrame combine_first() 方法

❮ DataFrame 参考


示例

合并两个 DataFrames,如果第一个 DataFrame 中的值为 NULL,则使用第二个 DataFrame 中的值

import pandas as pd

df1 = pd.DataFrame([[1, 2], [None, 4]])
df2 = pd.DataFrame([[5, 6], [7, 8]])

print(df1.combine_first(df2))
自己尝试一下 »

定义和用法

The combine_first() 方法合并两个 DataFrame 对象,如果第一个 DataFrame 中的值为 NULL,则使用第二个 DataFrame 中的值。


语法

dataframe.combine_first(other)

参数

参数 描述
other 必填。一个 DataFrame。

返回值

一个 DataFrame 对象。


❮ DataFrame 参考

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