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Pandas DataFrame last() 方法

❮ DataFrame 参考


示例

返回过去 5 天的行

import pandas as pd

jan = pd.date_range(start='2021-01-01', end='2021-01-31')

data = {
  "registered": [5, 4, 3, 4, 3, 5, 1, 6, 1, 9, 5, 3, 7, 2, 8, 4, 4, 6, 4, 3, 2, 5, 3, 4, 2, 6, 8, 5, 3, 4, 5]
}
df = pd.DataFrame(data, index=jan)

print(df.last('5D'))
自己尝试 »

定义和用法

last() 方法根据指定的值返回最后 n 行。

为了使此方法按预期工作,索引必须是日期。


语法

dataframe.last(offset)

参数

参数 描述
offset 必填。字符串或日期偏移量。指定要返回的日期

返回值

一个 DataFrame,包含指定行。


❮ DataFrame 参考

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