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Pandas DataFrame 的 astype() 方法

❮ DataFrame 参考


示例

返回一个新的 DataFrame,其中所有列的数据类型都已设置为 'int64'

import pandas as pd

data = {
  "Duration": [50, 40, 45],
  "Pulse": [109, 117, 110],
  "Calories": [409.1, 479.5, 340.8]
}

df = pd.DataFrame(data)

newdf = df.astype('int64')
自己尝试 »

定义和用法

astype() 方法返回一个新的 DataFrame,其中数据类型已更改为指定的类型。

您可以将整个 DataFrame 转换为一种特定数据类型,或者可以使用 Python 字典 为每一列指定数据类型,如下所示

{
  'Duration': 'int64',
  'Pulse'   : 'float',
  'Calories': 'int64'
}


语法

dataframe.astype(dtype, copy, errors)

参数

copy 和 errors 参数是 关键字参数

参数 描述
dtype 数据类型,或包含每列数据类型的字典
{
  'Duration': 'int64',
  'Pulse'   : 'float',
  'Calories': 'int64'
}
必需。指定数据类型
copy  True|False 可选。默认为 True。指定是返回副本 (True),还是在原始 DataFrame 中进行更改 (False)。
errors  'raise'|'ignore' 可选。默认为 'raise'。指定是在错误时忽略错误还是引发异常。

返回值

一个 Pandas DataFrame,其中更改根据指定的 dtype(s) 设置。


❮ DataFrame 参考

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