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Pandas DataFrame eval() 方法

❮ DataFrame 参考


示例

计算两列的和

import pandas as pd

data = {
  "Women": [125, 230, 412],
  "Men": [219, 185, 452]
}

df = pd.DataFrame(data)

print(df.eval("Women + Men"))
亲自尝试 »

定义和用法

eval() 方法评估字符串表达式并返回结果。

您可以通过指定列标签来引用特定列。


语法

dataframe.eval(expr, inplace, kwargs)

参数

inplace 参数是 关键字参数

参数 描述
expr   必需。要评估的字符串
inplace True
False
可选,默认值为 False。如果希望在现有 DataFrame 上执行评估而不是返回一个新的 DataFrame,则将其设置为 True。

 返回值

包含评估结果的 pandas 对象。


❮ DataFrame 参考

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