大 pandas 随机抽取 [英] Pandas random sample with remove

问题描述

我知道了DataFrame.sample()，但是我该怎么做，还要从数据集中删除样本? (注意:AFAIK与替换采样无关)

I'm aware of DataFrame.sample(), but how can I do this and also remove the sample from the dataset? (Note: AFAIK this has nothing to do with sampling with replacement)

例如，这是我要实现的目标的本质，这实际上是行不通的:

For example here is the essence of what I want to achieve, this does not actually work:

len(df) # 1000

df_subset = df.sample(300)
len(df_subset) # 300

df = df.remove(df_subset)
len(df) # 700

推荐答案

如果您的索引是唯一的

df = df.drop(df_subset.index)

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示例

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example

df = pd.DataFrame(np.arange(10).reshape(-1, 2))

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样本

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sample

df_subset = df.sample(2)
df_subset

放置

drop

df.drop(df_subset.index)

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