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Pandas DataFrame isin() 方法

❮ DataFrame 参考


示例

检查 DataFrame 中哪些单元格包含值 50 或 40

import pandas as pd

data = {
  "name": ["Sally", "Mary", "John"],
  "age": [50, 40, 30]
}

df = pd.DataFrame(data)

print(df.isin([50, 40]))
自己试试 »

定义和用法

The isin() 方法检查 DataFrame 是否包含指定的值。

它返回一个与原始 DataFrame 类似的 DataFrame,但原始值已替换为 True(如果该值是指定值之一),否则为 False


语法

dataframe.isin(values)

参数

参数 描述
values  必填。要检查 DataFrame 中是否存在的值。

可以是列表

df.isin([50, 30])

可以是字典

df.isin({'age': [50, 30]})

可以是 Series

values = pd.Series({"age": 50, "age": 40})
df.isin(values)

可以是 DataFrame

values = pd.DataFrame({'age': [50], 'name': ['Sally']})
df.isin(values)


返回值

具有所选结果的 DataFrame,如果结果仅包含一行,则为 Series


❮ DataFrame 参考

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