python dropna subset

在Python中，`dropna`是一个用于处理缺失值的函数，用于删除包含缺失值的行或列。其中，`subset`是一个参数，用于指定要删除缺失值的特定列。你可以将需要删除缺失值的列作为一个列表传递给`subset`参数。例如，在一个DataFrame中，如果你想删除包含缺失值的列"column1"和"column2"，你可以这样使用`dropna`函数：`df.dropna(subset=['column1', 'column2'])`。这将删除列"column1"和"column2"中包含缺失值的行。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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